Aclara Power Line Systems Y72572-1 Residential Metering Transponder User Manual UMT C KV User Guide

Aclara Power-Line Systems Inc. Residential Metering Transponder UMT C KV User Guide

User Manual

UNIVERSAL METERINGTRANSPONDER FOR kV2c METERUSER GUIDE Y10577-TUM REV C
Universal Metering Transponder for kV2c™ Meter User Guide ( Y10577-TUM Rev C)Proprietary NoticeInformation contained in this document is private to Distribution Control Systems, Inc., St. Louis, Missouri (DCSI). This information may not be published, reproduced, or otherwise disseminated without the express written authorization of DCSI.Any software or firmware described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license.DisclaimerThe information in this document is subject to change without notice and should not be construed as a commitment by DCSI. DCSI assumes no responsibility for any errors that may appear in this document.No responsibility is assumed for the use or reliability of software on equipment that is not supplied by DCSI.TWACS, the TWACS logo, and the DCSI logo are registered trademarks of Distribution Control Systems, Inc., St. Louis, Mo. All other registered trademarks are property of their respective owners. TWACS®Two-Way Automatic Communication System,a product ofDistribution Control Systems, Inc.Confidential and ProprietaryCopyright 2006, 2007. All Rights Reserved.
Universal Metering Transponder for kV2c™ Meter User Guide iFigures and Tables iiiChapter 1: Introduction 1Safety Warnings and Symbols . . . . . . . . . . . . . . . . . . . . . . . 2Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Product Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . 4Let Us Know How We’re Doing. . . . . . . . . . . . . . . . . . . . . . . 5TWACS System Overview . . . . . . . . . . . . . . . . . . . . . . . . . 6Chapter 2: Functional Description 9Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . 9Daylight Saving Time . . . . . . . . . . . . . . . . . . . . . . . . . . 10Universal Metering Transponder (UMT-C-KV) . . . . . . . . . . . . . . . . 10Functional Description of the UMT-C-KV . . . . . . . . . . . . . . . . . . 11Primary Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Data Retrieval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Loss of Power Handling . . . . . . . . . . . . . . . . . . . . . . . . . 18AC Input Voltage Tolerance Characteristics . . . . . . . . . . . . . . . 18Outage Duration Monitoring . . . . . . . . . . . . . . . . . . . . . . 19Power Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Power Reliability Indices. . . . . . . . . . . . . . . . . . . . . . . . 21Energy and Demand Measurement . . . . . . . . . . . . . . . . . . . . 22Total Consumption Present . . . . . . . . . . . . . . . . . . . . . . 22Meter Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Demand Measurement. . . . . . . . . . . . . . . . . . . . . . . . . 23Interval Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Additional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Configuration Monitoring . . . . . . . . . . . . . . . . . . . . . . . 25Installation With Instrument Transformers. . . . . . . . . . . . . . . . 25Tamper Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . 25Reverse Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 25No Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Voltage Agility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Voltage Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . 26EMTR-3-KV Interface (Multiport Capability) . . . . . . . . . . . . . . . 26On-Request Reads. . . . . . . . . . . . . . . . . . . . . . . . . . . 28Temperature Monitoring. . . . . . . . . . . . . . . . . . . . . . . . 29Historical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29480 Volt Applications . . . . . . . . . . . . . . . . . . . . . . . . . 29Calibration Testing . . . . . . . . . . . . . . . . . . . . . . . . . . 29Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30TWACS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Type and Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . 30Voltage Transformer (VT) Connected Meter/Transponder . . . . . . . . . . 31Verification of Equipment . . . . . . . . . . . . . . . . . . . . . . . 32Table of Contents
ii Universal Metering Transponder for kV2c™ Meter User GuideTable of ContentsInstallation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 32Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Thermal Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Changing the Sequence Delay . . . . . . . . . . . . . . . . . . . . . 34Chapter 3: Troubleshooting 35Performing Remote Analysis (TNS) . . . . . . . . . . . . . . . . . . . . . 35Performing Remote Analysis (TWACS NG) . . . . . . . . . . . . . . . . . . 37Field Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . 38Meter Shop Test System. . . . . . . . . . . . . . . . . . . . . . . . . . 39Chapter 4: Specifications 41Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 41Compliance Specifications . . . . . . . . . . . . . . . . . . . . . . . . 41Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . 42Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 43Additional Regulatory Data . . . . . . . . . . . . . . . . . . . . . . . . 44Acronyms 45Glossary 47Index 51
Universal Metering Transponder for kV2c™ Meter User Guide iiiFigure 1.1 TWACS system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Figure 2.1 UMT-C-KV module assembly. . . . . . . . . . . . . . . . . . . . . . . . . . .10Figure 2.2 View of UMT-C-KV module integrated within the kV2c meter. . . . . 11Figure 2.3 Block diagram of the UMT-C-KV 2.0. . . . . . . . . . . . . . . . . . . . . .12Table 2.1 Explanations for block diagram components . . . . . . . . . . . . . . . .12Table 2.2 Addresses and address modes . . . . . . . . . . . . . . . . . . . . . . . . .15Table 2.3 Supported TWACS system communication features . . . . . . . . . . .16Table 2.4 Metered quantities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18Table 2.5 Example 35D DSID table . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19Table 2.6 Meter Map and Meter Data Registers . . . . . . . . . . . . . . . . . . . . .22Table 2.7 Sample data storage days . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Figure 2.4 RF operation block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . .27Table 2.8 Model number, class, meter form, voltage, service type, and energy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Figure 2.5 Meter nameplate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32Figure 3.1 Optical port connection for kV2c meter. . . . . . . . . . . . . . . . . . .40Figure 3.2 SIA cable assembly for kV2c meter . . . . . . . . . . . . . . . . . . . . . .40Table 4.1 Electrical ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41Table 4.2 Compliance specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . .41Table 4.3 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . .42Table 4.4 Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43Figures and Tables
iv Universal Metering Transponder for kV2c™ Meter User GuideFigures and Tables
Universal Metering Transponder for kV2c™ Meter User Guide 1CHAPTER1INTRODUCTIONThis chapter contains general information about this manual, important safety warnings to observe when using this product, contact information to receive support, and an overview of the TWACS system.
2Universal Metering Transponder for kV2c™ Meter User GuideSafety Warnings and SymbolsSafety Warnings and SymbolsThe following symbols are used in this manual.Symbols and WarningsWARNING: Indicate a risk of injury, possible death, and equipment damage.WARNING: Indicates a risk of electric shock, causing possible injury, death, and equipment damage.
Universal Metering Transponder for kV2c™ Meter User Guide 3Chapter 1 • IntroductionSupportThe TWACS Portal (https://portal.twacs.com/) provides a wide range of information that can serve as a starting point when you have a question. The Portal contains information such as:If, at any time, you would like to speak with a DCSI representative about any product or service or if you do not have a username and password to access the Portal, please contact DCSI Customer Care:Product ReturnsIMPORTANTBefore returning product to DCSI, make sure you have identified the root cause of the problem. As needed, perform troubleshooting requesting Technical Support through DCSI Customer Care when additional assistance is required. It is critical to identify the root problem to avoid shipping hardware for repairs when the problem lies elsewhere.To return DCSI products for repair, complete the Service & Repair RMA Request through the TWACS Portal (https://portal.twacs.com), providing as much detail about the problem as possible. If you have any questions regarding your return, please contact rma@twacs.com or call 1-800-892-9008 and choose the Service and Repair option.•User Guides •FAQs • Service Advisories • Customer Discussion Threads• Training Registration • Upcoming Events• Certified Partner Information • User Group Conference Information• Current News • The Power Line NewsletterEmail: care@twacs.comPhone: 1-800-892-9008Address: Distribution Control Systems, Inc.945 Hornet DriveHazelwood, MO 63042USA
4Universal Metering Transponder for kV2c™ Meter User GuideRelated DocumentationRelated DocumentationThe following publications are referenced in this manual. The documents listed below plus the latest version of all other DCSI technical publications are available through the TWACS Portal (https://portal.twacs.com/).Meter Shop Test System HelpProvides all the necessary details required for testing TWACS-enabled devices with the Meter Shop Test Tool software. Access the Help through the Meter Shop Test Tool software interface. The Help is not available through the TWACS Portal.Meter Shop Test System Set-Up Guide (Y10030TM)Provides information that enables you to test TWACS-enabled devices for TWACS signaling response, read select transponder registers, zero select transponder registers, and perform various other transponder functions.Portable RCE Test Unit Technical Manual (Y103127-3TM)Ships with the Portable RCE Test Unit. Includes detailed product specifications and operating instructions.TNS End User Guide (Y10285TM)Serves as a companion manual to the TNS Operational Process Guide. While the TNS Operational Process Guide provides high-level process and procedure recommendations for obtaining optimum results from your TWACS system, the TNS End User Guide provides the detailed procedures, and form field and application definitions, that enable you to perform the functions found in the process manual.TNS Operational Process Guide (Y10352TM)Presents high-level procedures and processes for operating your TWACS system, through the TNS interface. These processes and procedures span a number of application sets, and are organized around functions such as reading meters, substation setup, and operating TNS.Transponder Type and Model Matrix (Y10598-TEB)Provides a listing of transponders, transponder types, and applicable meter models.TWACS® Network Gateway Operational Process Guide (Y10433-TUM-NGT)Includes procedures and processes for operating your TWACS system through the TWACS® NG interface. The information spans a number of application sets, and are organized around functions such as reading meters, substation setup, and operating TWACS NG.
Universal Metering Transponder for kV2c™ Meter User Guide 5Chapter 1 • IntroductionTWACS® NG System HelpBuilt into the TWACS® NG interface, topic and index-searchable online system help is available. Access the Help through the software interface. The Help is not available through the TWACS Portal.TWACS® - ORION® for UMT Products User Guide (Y20100-TUM)Provides a brief overview of the TWACS-ORION system, explains how the TWACS-ORION system interfaces with the TWACS system, and describes the functions of the EMTR-3, HHTR-3, and ORION transmitter.UMT-C-KV Field Installation Instructions (Y73111-3)Presents field installation diagrams for all meter forms supported by the transponder.Let Us Know How We’re DoingIn an ongoing effort to produce effective documentation, the Technical Publications department at DCSI welcomes any feedback you can offer regarding this manual.Please relay feedback, including suggestions for improvement or to alert us to corrections, by sending an email to techpubs@twacs.com or calling Customer Care at 1-800-892-9008.
6Universal Metering Transponder for kV2c™ Meter User GuideTWACS System OverviewTWACS System OverviewThe TWACS system is a fixed network, utility communication system. Running at a centralized location, the TWACS operating software communicates with end points, such as meters, by way of existing power lines. The TWACS system allows full two-way access to and from the consumer’s meter, providing communication and control features for the Utility. The TWACS system consists of three levels of components (see Figure 1.1):• Master Station (MS)The Master Station TWACS operating software, either TWACS Net Server (TNS) or TWACS® Network Gateway (TWACS NG), is the chief component of the entire Two-Way Automatic Communication System (TWACS). The Master Station software manages all collected metering and interval data as well as the connection between the utility and the consumer’s premises. TNS is DCSI’s standard solution while TWACS NG is available for very large deployments requiring a high volume of readings for time-of-use or critical peak pricing programs.The primary functions of TNS and TWACS NG are:•Managing the TWACS system communication network.•Supporting applications such as metering, troubleshooting, outage detection, and load control.•Collecting remote meter data for the database server, which forwards the data to a third-party utility software application.TNS and TWACS NG are part of the corporate enterprise network. The system is based on the Oracle® database, which is an open system, meaning it can interact and inter-operate with other applications on local and remote systems, on a variety of hardware platforms, and in a number of software environments. The system provides the user interfaces for configuring the necessary parameters to retrieve and send data.• Substation Communications Equipment (SCE)• Remote Communications Equipment (RCE)This is the level at which the meter transponder resides within the electric meter.As shown in Figure 1.1, outbound messages originate in the Master Station and pass through the substation to the transponder (RCE). Inbound meter data is sent from the transponder to the SCE, where it is decoded and then sent to the Master Station for analysis or bill file creation.
Universal Metering Transponder for kV2c™ Meter User Guide 7Chapter 1 • IntroductionFigure 1.1 TWACS system
8Universal Metering Transponder for kV2c™ Meter User GuideTWACS System Overview
Universal Metering Transponder for kV2c™ Meter User Guide 9CHAPTER2FUNCTIONAL DESCRIPTIONThis chapter provides an overview of the TWACS® system, explains how the Universal Metering Transponder for the GE kV2c meter (UMT-C-KV MP) interfaces with the TWACS system, and describes the functions of the transponder. This user guide provides feature and functionality information for Firmware version 2.00. Enhancements since version 1.20 include, but are not limited to:• Addition of EMTR-3-KV interface (multiport)• New module type number - 101The kV2c meter may hereafter be referred to as kV2c, kV2c meter, or meter. UMT, UMT-C-KV, transponder, and module refer to the DCSI UMT-C-KV MP.Time SynchronizationThe Master Station is synchronized to an official US reference atomic time clock. The Master Station sets the time in each of the SCEs, and the SCE broadcasts the time to all the RCEs. TWACS communication introduces a fixed time difference (offset) between the Master Station clock and the RCE master clock. In addition, a free running Real-Time-Clock (RTC) is provided in the UMT-C-KV as an alternate time base for maintaining the time when the RCE experiences a power down or an interruption. The RTC maintains the RCE time (during an outage) for a period of no less than 24 hours. This RTC is a Secondary Time Base for the RCE and is accurate to within 17.5 seconds per day. The RCE uses the RTC time for time-stamping an event when the power is restored. It also maintains all timing functions until the RCE is again in time sync with the SCE transmitted time sync signal. Each time the RCE hears the time sync broadcast, it compares its master clock time with the SCE time. If the offset between SCE time and the master clock time does not exceed the threshold limits (± 15 seconds), they are considered to be operating in synchronization.The UMT-C-KV internal Serial Date and Serial Time registers are volatile and are initialized at power-up. The UMT-C-KV updates its Serial Date & Time registers when it receives the Set RCE Date/Time command. The Set RCE Date/Time command, normally sent every fifteen minutes from the CCE to the SCE, synchronizes the SCE clock to the CCE clock. To update serial date and time, the SCE sends the Set Date/Time command automatically to the UMT-C-KV. Certain UMT-C-KV functions are not performed if the Serial Time is invalid. TWACS uses Serial Time Units (STU) as measures of time. Each STU equals 2.5 seconds, with midnight equal to zero.
10 Universal Metering Transponder for kV2c™ Meter User GuideDaylight Saving TimeThe UMT-C-KV does not support the bi-annual Daylight Saving Time (DST) change as a scheduled routine. However, when the Master Station transmits a time sync command after the DST change has occurred, the RCE recognizes an offset exceeding the threshold limits (offset of one hour ± 15 seconds versus the 15 second threshold). The RCE master clock time is updated automatically. Whenever the RCE master clock time is corrected to implement daylight saving time, one hour of data is lost on the 23 and 25 hour days, and the corresponding hour bins are marked as invalid.Instructions for updating your TNS system for the Daylight Saving time adjustment are in the TNS Operational Process Guide.Universal Metering Transponder (UMT-C-KV)The Universal Metering Transponder (UMT-C-KV) is a remote power-line communication transponder contained within and interfaced to a kV2c meter. The UMT-C-KV integrates a single or polyphase meter with TWACS. The UMT-C-KV can be integrated with kV2c meters of various forms and classes. See Table 2.8 on page 30. AC power enters the kV2c meter from the Utility supply. The UMT-C-KV receives operating DC power from the kV2c meter and communicates with the meter through a multiconductor ribbon cable. Communication between the UMT-C-KV and the utility company is provided by TWACS across the Utility power lines.Figure 2.1 UMT-C-KV module assembly
Universal Metering Transponder for kV2c™ Meter User Guide 11Chapter 2 • Functional DescriptionFigure 2.2 View of UMT-C-KV module integrated within the kV2c meterFunctional Description of the UMT-C-KVThe UMT-C-KV acts as an interface between the kV2c meter and TWACS powerline communication technology. It facilitates communication of kV2c meter quantities over the utility company distribution power lines. The diagram in Figure 2.3, “Block diagram of the UMT-C-KV 2.0”, illustrates the functionality of the UMT-C-KV. Table 2.1 explains the block diagram components.UMT-C-KVModule
12 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVFigure 2.3 Block diagram of the UMT-C-KV 2.0The kV2c meter is plugged into an American National Standards Institute (ANSI) industry standard meter socket. All UMT-C-KV models can perform five minute reads of voltage values. A choice between 60-, 30-, 15-, 10-, or 5-minute interval electric metering is available. 32 registers from the kV2c meter can be mapped to the transponder. Six of these data values are pre-defined in the transponder.Table 2.1Explanations for block diagram componentsComponent DefinitionTWACS UMT-C-KV microprocessor Processes all inputs and generates and controls transmission of outputsPower loss detection UMT-C-KV response facilitates orderly shutdown and saving of important data when AC power is not adequate for operationkV2c Meter Provides metering data to the UMT-C-KV via serial communicationsTWACS outbound detection circuitry Monitors the AC power for TWACS outbound signalSerial port - test Used to perform initial programmingNon-volatile memory Preserves register data during power outagesTWACS inbound generation circuitry Generates TWACS inbound messages at the UMT-C-KV, which are transmitted to the SCEEMTR-3-KV Electric Meter Transceiver-3. Serves as the gateway to the TWACS network for the remote RF water, gas, or propane meters.TWACSUMT-C-KVMicrocontrollerSERIAL PORT(TEST)NONVOLATILEMEMORYGEkV2c/c+MeterSERIALLINKPOWERLOSSDETECTIONTWACS OUTBOUND DETECTION CIRCUITRYTWACS INBOUND GENERATION CIRCUITRYEMTR-3-KV
Universal Metering Transponder for kV2c™ Meter User Guide 13Chapter 2 • Functional DescriptionPrimary FunctionsThe UMT-C-KV has two primary functions:• Communication - receive TWACS outbound commands and generate TWACS inbound responses. • Data retrieval - from customer-selected kV2c meter registers configured at meter/transponder integration.Each of these functions is described in the following sections and is graphically represented in Figure 2.3.CommunicationThe UMT-C-KV communication process is described in the following sections.Meter InterfaceThe UMT-C-KV performs the interface function of connecting a kV2c electric meter to TWACS. It interfaces with the meter’s communication port and to the power line using TWACS communication technology. The UMT-C-KV uses TWACS technology to communicate from the meter, to the SCE, to the utility company over the power distribution lines. The outbound/inbound synchronization techniques allow detection of one outbound command at a time. When a command is detected, the UMT-C-KV either completes two-way command processing and transmits the inbound response before outbound detection resumes, or, the UMT-C-KV completes one-way command processing before outbound detection resumes.Serial Number AddressThe serial number address is the unique, fixed address present in every UMT-C-KV. It is assigned at the factory and can be written using the Serial Communication Port. It is used to address one UMT-C-KV at a time. This address must be used during the initialization of the UMT-C-KV to assign at least the first two-way address. Subsequently, the serial number address is optionally used for communication to a single UMT-C-KV. The serial number address is also used when testing the module with RCE test equipment.Two-Way AddressUp to eight (8) two-way addresses are assigned to the UMT-C-KV in order for the TWACS operating software and the module to communicate with each other.NOTESome features and capabilities of the transponder may not be supported, or may be only partially supported by some versions of master station software.
14 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVTwo-way addresses are comprised of three fields:• Function - operational application, e.g. outage detection. Valid range 1-63.• Group - quantity of RCEs addressed by group. Valid range 1-262,143.• Unit - further subdivision of Group field and specific to channeling scheme. Valid range 1-255.Certain restrictions are placed on the assignment of multiple addresses. Specifically, no more than one two-way address slot in an individual UMT-C-KV can contain the same function and group fields.A two-way address is written to a specific address slot using a ‘Write RCE Registers’, ‘Bulk Assign Two-way Addresses’, or ‘Initialize RCE’ command. In order to assign a new two-way address, the contents of the address slot are simply overwritten. A two-way address is de-assigned by writing the slot to zero.TWACS-10 and TWACS-20 Communication ProtocolsTWACS-10 and TWACS-20 communication protocols establish the method and form that can be used to address Remote Communications Equipment. TWACS-10 and TWACS-20 capable RCEs can be addressed using TWACS-10 modes. However, TWACS-10-only capable RCEs can not be addressed using TWACS-20 protocol modes . TWACS-10 and TWACS-20 addressing protocols are supported by the UMT-C-KV.Following assignment of a two-way address to the UMT-C-KV, subsequent commands may utilize the following TWACS-10 or TWACS-20 address modes:TWACS-10 Addressing Modes• Serial Number (Mode 1), addressing a single module, with or without a response• Two-way unit (Mode 2), addressing a single module, with or without a response• Two-way group (Mode 3), addressing a group of up to 256 modules, with or without a response• One-way functional (Mode 4), addressing an unlimited number of modules, with no responseTWACS-20 Addressing ModesIncludes all of the TWACS-10 Addressing Modes, plus the following:• Serial Number Set (Mode 7.7), addressing ad-hoc sets with or without response, concurrent feeders• Function/Group/Unit Set, (Mode 7.8)addressing sets of up to 64 non sequential units with or without response, concurrent feeders• Function/Group Set (Mode 7.9), addressing up to 8 groups of 256 units each, with or without response, concurrent feeders
Universal Metering Transponder for kV2c™ Meter User Guide 15Chapter 2 • Functional DescriptionTwo-way addresses are not associated with any particular function or port. The three addressing modes supported by the two-way address can be used to perform any function in the UMT-C-KV when the appropriate command parameters are used. The table below summarizes addresses and addressing modes supported by the UMT-C-KV.Table 2.2Addresses and address modesAddresses AvailableSerial Number SupportedTwo-Way Assignable Supported (8 slots)One-Way Assignable Not ApplicableAddressing RangeSerial Number 1 to 4,294,967,295Two-Way AssignableFunction 0 to 63Group 0 to 262,143Unit Number 0 to 255TWACS-10 Addressing ModesSerial Number (Mode 1) One-Way & Two-WayTwo-way by Unit (Mode 2) One-Way & Two-WayTwo-way by Group (Mode 3) One-Way & Two-WayOne-way Functional (Mode 4) One-Way onlyTWACS-20 Addressing ModesSerial Number Set (Mode 7.7) One-Way & Two-WayFunction/Group/Unit Set (Mode 7.8) One-Way & Two-WayFunction/Group Set (Mode 7.9) One-Way & Two-Way
16 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVThe table below summarizes TWACS system communication features supported by the UMT-C-KV.Serial Communications Using the Manufacturer's Serial Port Communications between the UMT-C-KV Serial Port and the meter Test/Programming Connector requires the use of Identification and Security packets. In this mode of operation the transponder recognizes that its serial ports are sharing the same serial communication line and will not transmit from both of its serial ports at the same time.Table 2.3Supported TWACS system communication featuresResponse Modes - TWACS-10Standard Inbound Header, Data (3 to 13 bytes)Error Correction Header, Data, Hamming (4 to 14 bytes)Fast Poll Fixed Header Only (1 byte with all indicator bits: Alarm, Diagnostics, Tamper, and Outage, fixed at 1)Link-Level Acknowledge Header (3 bytes)No Response No Inbound Response (0 bytes)Response Modes - TWACS-20Standard (Mode 0) Header, Data (3 to 7 bytes)Standard (Mode 1) Header, Data (4 to 14 bytes)Standard (Mode 2) Header, Data (5 to 14 bytes)Link-Level (Mode 4) Header (3 bytes)Fast Poll (Mode 6) Fixed Header (1 byte)No Response (Mode 7) No Inbound Response (0 bytes)Standard (Mode 8) Header, Data (3 to 7 bytes)Standard (Mode 9) Header, Data (4 to 14 bytes)Standard (Mode 10) Header, Data (5 to 14 bytes)Inbound SignalingChannels 6 channelsChannel Sets Channel sets 0-5 for SCE and channel set 6 for RCE test equipmentTime Slots 256 time slotsMessage Capacity 14 bytesBurst Capacity 22 bytesMaximum Outbound Message Length 31 bytes62 bytes in TWACS-20 extended length mode
Universal Metering Transponder for kV2c™ Meter User Guide 17Chapter 2 • Functional DescriptionMeter Optical Port Support NOTEAll serial port opcodes defined for the UMT-C-KV are accessible through the meter optical port.Communications between the meter optical port and the UMT-C-KV Test/Programming Serial Port begins with the transponder receiving a specified hexadecimal Identification Packet (IP) from the meter optical port - EE 80 20 00 00 01 20 20 75. After receiving the IP from the meter optical port the UMT-C-KV transmits an acknowledgement back to the meter optical port, verifies the password, sends an acknowledgement to the meter, and asserts its Modem Busy line. The transmission of the Identification Packet and Security Packet conforms to the ANSI C12.18 communication protocol. After password acknowledgement, all communication between the meter optical port and the transponder uses the Gateway Serial Protocol, GATEWAY-SPEC, in ASCII at 9600 baud. Communication between the meter optical port and the transponder continues to follow the gateway protocol until 1.0 +/- 0.01 seconds have passed since the last communication. After this period has passed, the Modem Busy line is de-asserted. Password AccessA default password is supplied to the customer for optical port access to the transponder. The transponder contains a “Bad Password Counter”. After counting 4 incorrect passwords, the transponder locks out Serial Communication between the meter optical port and the transponder Test/Programming Serial Port for 15 minutes. At the same time, the transponder sets bit 0 of register #36,”Indicators Tamper”. Bit 0 of register #36 remains set until cleared by TNS. The “Bad Password Counter” is cleared if no incorrect password has been received by the transponder within the last 15 minutes. Data RetrievalThe UMT-C-KV reads a subset of 32 registers as selected by the utility company. All selected data are read at power-up and every five minutes thereafter if a valid RCE Time Synchronization command was received. See Time Synchronization on page 9.NOTESome features and capabilities of the transponder may not be supported, or may be only partially supported by some versions of master station software.Consumption Metering (Wh)The UMT-C-KV provides remote access to the energy measurement registers of the kV2c meter. The UMT-C-KV retrieves appropriate values from the meter’s internal ANSI Standard tables. The UMT-C-KV retrieves data from only “programmed” kV2c registers. When requested, the UMT-C-KV can supply data from the latest read.
18 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVTime-of-Use (TOU)The kV2c meter can perform time-of-use metering when required and programmed accordingly. The time-of-use schedule is loaded into the meter during meter/RCE integration. This schedule determines the times that the different TOU rates are in effect. The UMT-C-KV supports the kV2c meter TOU functionality. The UMT-C-KV transponder can be programmed to retrieve TOU data when its registers are appropriately mapped.Billing DataThe kV2c transponder can retrieve active, reactive, and apparent power from a correspondingly programmed kV2c meter. The UMT-C-KV can be programmed at Integration to retrieve any of these values from a kV2c meter. Table 2.4 lists the approved quantities that the kV2c meter is capable of measuring.Loss of Power HandlingThe UMT-C-KV transponder is powered by DC voltage from the meter power supply. It does not have its own “on-board” power supply. The UMT-C-KV recovers from any and all voltage interruptions and low voltage events upon restoration of normal power. Data is stored in non-volatile memory in the UMT-C-KV and is not lost during brief power interruptions. The UMT-C-KV marks 5-minute bins that were marked as invalid. The Power Down Count register increments for each power event.AC Input Voltage Tolerance CharacteristicsUnregulated AC power for the UMT-C-KV is supplied from the kV2c meter and has a dependent voltage tolerance curve (CBEMA).Table 2.4Metered quantitiesMetered QuantityDelivered Energy (Wh)Received Energy (Wh)Net Energy (Wh)Secure (Sum) Energy (Wh)Delivered Reactive Energy (VARh)Received Reactive Energy (VARh)Delivered Apparent Energy (VAh)Received Apparent Energy (VAh)Delivered Q Energy (Qh)Received Q Energy (Qh)
Universal Metering Transponder for kV2c™ Meter User Guide 19Chapter 2 • Functional DescriptionOutage Duration MonitoringFor this user guide, an outage is defined as a loss of supply voltage sufficient to cause the UMT-C-KV to power down. Outage duration is the interval between power-down and power-up of the UMT-C-KV. The transponder maintains counts of the number of outages in the Power Down Count register, ID 40.NOTESome features and capabilities of the transponder may not be supported, or may be only partially supported by some versions of master station software.There may be power interruptions too short for the UMT-C-KV transponder to see it as an interruption. In this case the interruption is not considered an outage by the UMT-C-KV. The types of interruptions, per IEEE 1366, are divided into two categories:• Momentary Interruptions - interruptions of less than five minutes. • Sustained Interruptions - interruptions not classified as Momentary Interruptions. (A utility can select any duration ranging from a minimum one minute up to a maximum eight minutes in 2.5 second increments. However, if modified, the interruption definition is no longer consistent with IEEE Std. 1366.)The default Sustained Interruption value is 5 minutes.The UMT-C-KV captures power interruption data as follows:• Time stamp and duration of the 12 most recent interruptions.• Sustained interruption duration data.• Momentary interruption counter.• Momentary interruption event counter.The UMT-C-KV stores the daily interruption data for the last 35 days, but it will not necessarily preserve the time stamp information for all the interruptions. An example of the 35 Day Daily Interruption Summary Data (35D DISD) table is shown in Table 2.5. The table represents the daily interruption summary data for the last 35 days and has been designed to maintain the interruption data in a format that supports the calculation of reliability indices such as those described in the IEEE-Std. 1366. Refer to Power Reliability Indices for additional information.Table 2.5Example 35D DSID tableDate Total Sustained Interruption Duration for the day11. 20 Bits with 2.5 sec. resolution corresponds to 30.34 days (728 hours) duration.Total Sustained Interruptions during the dayTotal Momentary Interruptions during the dayTotal Momentary Interruption Events during the dayData Overflow Alarms16 Bits 20 Bits 5 Bits 7 Bits 6 Bits 2 Bits
20 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVIt is recommended that TWACS retrieves the daily interruption summary data at least every two weeks.The transponder will supply the following data as requested by the Master Station:• A power-down count in a cumulative format.• A summary of interruptions for the latest 12 time stamped interruptions.• The time stamped data for any given incident on any given day from the latest 12 time stamped interruption data. The data is read directly from the 35D DSID table.• A report describing the summary of power-down incidents for a range of dates from the data collected for the past 35 days. The summary for the range of dates includes the summed duration of the sustained interruption, the total number of sustained interruptions, the total number of momentary interruptions, and the total number of momentary interruption events. The date range is limited to a maximum of fifteen days.• The 35D DISD data pattern for a given date range. The date range is limited to fifteen days. • A report describing the summary of power-down incidents for any given day from the data collected for the past 35 days. The summary will include the summed duration of the sustained interruption, the number of sustained interruptions, the number of momentary interruptions, and the number of momentary interruption events for the given day. The data is read directly from the DISD table.The UMT-C-KV offers limited polyphase detection. See Loss of Power Handling.Power DownThe UMT-C-KV maintains a count (in the Power Down Count register) of the number of times it experiences a power-down condition. A date-and-time stamp of power-down, along with the duration for the most recent interruption, is recorded. The register relates only to phase interruptions that affect meter power. A phase loss translates to a loss of power to the meter and transponder.
Universal Metering Transponder for kV2c™ Meter User Guide 21Chapter 2 • Functional DescriptionPower Reliability Indices The UMT-C-KV registers capture interruption data in the listed categories that can be used to calculate distribution reliability indices as specified in IEEE Std.1366, 2003 Edition, IEEE Guide for Electric Power Distribution Reliability Indices - a standard for power reliability within distribution systems, substations, circuits, and defined regions.NOTESome features and capabilities of the transponder may not be supported, or may be only partially supported by some versions of master station software.The UMT-C-KV captures power interruption data as follows:• Time stamped sustained interruption data.• Time stamped momentary interruption data.• Time stamped momentary interruption event data.• Momentary interruption data.• Sustained Interruption data.Additional Utility-specific data may be required to properly calculate the associated Distribution Reliability Indices.IEEE Standard.1366 defined Distribution Reliability Indices are:• System Average Interruption Frequency Index (SAIFI)• System Average Interruption Duration Index (SAIDI)• Customer Average Interruption Duration Index (CAIDI)• Customer Average Interruption Frequency Index (CAIFI)• Customer Total Average Interruption Duration Index (CTAIDI)• Average Service Availability Index (ASAI)• Average system interruption duration index (ASIDI)• Average system interruption frequency index (ASIFI)• Customers Experiencing Multiple Interruptions (CEMIn)• Momentary Average Interruption Frequency Index (MAIFI)• Momentary Average Interruption Event Frequency Index (MAIFIE)• Customers Experiencing Multiple Sustained Interruptions and Momentary Interruption Events (CEMSMIn)
22 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVEnergy and Demand MeasurementThe UMT-C-KV can read the appropriate mapped registers of the kV2c meter on a scheduled basis and then store those readings in registers in its own memory. NOTESome features and capabilities of the transponder may not be supported, or may be only partially supported by some versions of master station software.Total Consumption PresentThe UMT-C-KV provides Total Consumption data by reading the applicable registers from the kV2c meter. These registers must be mapped by Meter Map Register 1, 3, and 4. Table 2.6Meter Map and Meter Data RegistersRegister Name Reg ID DecReg Length/# Bytes Access Default Value Units StatusMeter Map Register #1-kWh 290.2 4 RW AMI Tbl/Off EMeter Map Register #2-Unassigned 291.2 4 RW AMI Tbl/Off EMeter Map Register #3-Forward 292.2 4 RW AMI Tbl/Off EMeter Map Register #4-Reverse 293.2 4 RW AMI Tbl/Off EMeter Map Register #5-Voltage A 294.2 4 RW AMI Tbl/Off EMeter Map Register #6-Voltage B 295.2 4 RW AMI Tbl/Off EMeter Map Register #7-Voltage C 296.2 4 RW AMI Tbl/Off EMeter Map Registers #8-#16 - Unassigned 297.2-305.24 RW AMI Tbl/Off EMeter Map Registers #17-#32 - Unassigned 1800.0-1815.0 4 RW AMI Tbl/Off NMeter Data Register #1-kWh 306.0 8 RV 0 AMI EMeter Data Register #2-Unassigned 307.0 8 RV 0 AMI EMeter Data Register #3-Forward 308.0 8 RV 0 AMI EMeter Data Register #4-Reverse 309.0 8 RV 0 AMI EMeter Data Register #5-Voltage A 310.0 8 RV 0 AMI EMeter Data Register #6-Voltage B 311.0 8 RV 0 AMI EMeter Data Register #7-Voltage C 312.0 8 RV 0 AMI EMeter Data Registers #8-#16 - Unassigned 313.0-321.08RV0AMIEMeter Data Registers #17-#32 - Unassigned 1816.1-1831.1 8RV0AMIN
Universal Metering Transponder for kV2c™ Meter User Guide 23Chapter 2 • Functional DescriptionMeter ConstantsThe UMT-C-KV can store and communicate required meter values when those values are programmed in the meter and are mapped to a register in the UMT-C-KV. Values may include, but are not limited to: VT ratio, CT ratio, meter constant/Kh value, number of dials, meter type, etc. This allows the TWACS Master Station to automatically capture this information for billing without additional manual data entry. For example, in the kV2c meter, the Total Consumption in numeric kWH values is captured in the appropriate metering register and then retrieved by the appropriately mapped transponder registers and relayed to the Master Station per scheduled or on demand requests. Demand MeasurementThe UMT-C-KV is configured to perform Demand Metering by reading demand-related values from the kV2c meter’s ANSI Standard Table 23 and 63. The UMT-C-KV can retrieve these values from the appropriately mapped meter registers. These locations can be mapped to any available Meter Map Register, except for Meter Map Register 1, and 3 through 7. Demand ResetThe Demand Reset command instructs the UMT-C-KV to execute a Demand Reset. This operation updates Meter Data registers, but only if the 255-minute RCE Demand Lockout Time is expired. The lockout period is based on the Time/Date Stamp of the last Demand Reset.When a Demand Reset command is issued, the RCE checks for the presence of a lockout condition and if none exists:• Updates the Meter Data Registers • Sends the meter a Demand Reset command • Shifts the newly populated Meter Data Registers to the Historical Data Billing Shift registers • The actual date and time of this shift is captured in Actual Shift/Reset Timestamp register #335The 255-minute RCE Demand Lockout Time prevents an unwanted demand reset when the UMT-C-KV receives a Demand Reset retry. The timer is nonvolatile and evaluates the 255-minute lockout at power-up. If a RCE Demand Lockout is in effect, a demand reset will not occur. If a shorter lockout time is selected for the RCE, the 255-minute lockout time supersedes the shorter value.
24 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVNOTEThe Demand Reset and shift must occur simultaneously, and a Demand Reset can’t occur until 255 minutes after the Time/Date Stamp stored for the last Demand Reset. Therefore it is possible that a shift may be delayed by the 255-minute RCE Demand Lockout. Since the demand measurement may correspond to the utility’s billing system, the Demand Reset command ensures the integrity of the customer’s bill.Billing Cycle Read with Demand Reset When there is a valid date in the Billing Cycle Date register #334, the same procedure as described in the Demand Reset paragraph automatically executes on the prescribed date and at the time specified in the Meter Daily Shift Time register #332.Interval DataInterval data is described as the consumption values recorded over one or more successive time intervals. The UMT-C-KV collects interval data from only the Meter Data Registers.NOTESome features and capabilities of the transponder may not be supported, or may be only partially supported by some versions of master station software.The UMT-C-KV supports 4 channels of interval data collection. Each channel can store 7 days of storage per channel at the fastest sampling rate, or 35 days of 5-minute data for a single channel, whichever is greater. The default setting is 1 active channel with a 60-minute sample rate.The UMT-C-KV can report hourly interval consumption data by collecting the data from the kV2c meter and transmitting it over the TWACS channel. Hourly retrieval (60-minute) is the default read frequency, but the UMT-C-KV can supply data in 5-, 10-, 15-, and 30-minute intervals as well. Refer to the following table for storage days based on sample rate and number of active channels.Table 2.7Sample data storage daysNOTEThe data is expressed as the difference between data values at successive points in time. The interval used for interval data reporting (e.g. 60 min.) may be different than the interval used for demand capture (e.g. 15 min.).Number ofActive ChannelsSample Rate5 Minutes 10 Minutes 15 Minutes 30 Minutes 60 Minutes1 35 70 105 210 4202 17.5 35 52.5 105 2103 11.67 23.33 35 70 1404 8.75 17.5 26.25 52.5 105
Universal Metering Transponder for kV2c™ Meter User Guide 25Chapter 2 • Functional DescriptionAdditional FeaturesThe following sections describe additional features of the UMT-C-KV transponder.Configuration MonitoringThe UMT-C-KV monitors the Host Meter Configuration register in the kV2c meter. This register contains the programming information for the meter and is updated whenever the meter is reprogrammed. The UMT-C-KV reads and stores this configuration data in registers within its own memory. When the UMT-C-KV configuration registers are read, the transponder reads the Host Meter Configuration register and compares the data values. If the values differ, the transponder sets a flag in the Alarm Indicators register and stores the new value in its configuration data registers.NOTESome features and capabilities of the transponder may not be supported, or may be only partially supported by some versions of master station software.Installation With Instrument TransformersIn some applications, the meter may be connected using step-down current transformers (CT) and/or voltage transformers (VT). In all such cases, the metered consumption represents energy consumption as seen on the secondary side of the transformer. Tamper DetectionDetection of meter removal from the socket is implemented via the availability of power-down counts in the transponder. Refer to Power Down for additional information. Both Forward energy and Reverse energy are referenced through dedicated Meter Map Registers.The Master Station may choose to mask one or more bits using the Tamper Indicators Mask Register. This will suppress further tamper indications for the masked bits until the flag is cleared. The Tamper Indicators Mask Register is configured at the time of integration.Reverse RotationThe transponder monitors for reverse energy flow and sets an error/alarm flag in the Tamper Indicators register if this condition is detected. Reverse rotation must be greater than or equal to 255 meter units of Reverse energy before this alarm flag is set.No ConsumptionWhen no consumption is detected for 24 hours, the “No Consumption in 24 Hours” flag in the Tamper Indicators Register is set.
26 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVVoltage AgilityThe UMT-C-KV utilizes a range of voltages that enables the transponder to automatically use the voltage available to the commercial meter. The UMT-C-KV supports TWACS communication at any voltage (within the range of 120VAC-480VAC) that the meter form supports. Voltage Monitoring The UMT-C-KV obtains 3 phase voltage data every 5 minutes from the kV2c meter. When the CCE detects a voltage anomaly it can read and obtain “full meter accuracy” (by reading all the mapped register values) from the meter via the UMT-C-KV. These values are obtained using the Meter Map Registers and reading the pre-defined Meter Data Registers.EMTR-3-KV Interface (Multiport Capability)The UMT-C-KV connects to an integrated RF transceiver called the Electric Meter Transceiver Model 3, referred to as the EMTR-3-KV. The EMTR-3-KV receives power from the UMT-C-KV and has its own microcontroller, RF circuitry, and antenna. The EMTR-3-KV receives and stores RF transmissions containing consumption/status information from Intelligent End Devices (IEDs) such as water, gas, or propane meters. The following block diagram summarizes the interfaces and communications between the system components.
Universal Metering Transponder for kV2c™ Meter User Guide 27Chapter 2 • Functional DescriptionFigure 2.4 RF operation block diagramThe EMTR-3 KV transmits and receives internally stored data using 79 channels spaced equally across the 902 MHz - 928 MHz band. Channel 1 is at 902.628 MHz, and Channel 79 is at 927.789 MHz. The EMTR-3 KV is primarily a receiver, but transmits 5-second replies to the Hand Held Transceiver (HHTR) installation tool during initial installation of the meter. The EMTR-3 KV operates under Paragraph 15.249 of FCC Regulations and employs frequency shift keying (FSK) to convey data. No subcarriers are used. HHTR DataRF = PIC 18 LF242902 -928 MHzUI = PIC 18 LF67208 MHz7.2V NiMH 1600 mAHRegulated to 5V and 3.3VEMTR-3 KV DataOrion Data916 .45 MHzData Rate = 100 kbps 2-level FSK +/- 50 Khz(3 of 6) Orion Transmitter Orion Transmitter HHTRHandheldTransceiver PCData Transfer from / toHHTR kV2c™ with EMTR-3 KVRF InterfaceOrion Transmitter Orion Transmitter RF Operation Block Diagram(TWACS-Orion Project)June 22, 2007Wire Interface to Water/Gas MeterEncoder 1- way RF Link902- 928 MHzBi- DirectionalRF LinkRS- 232Multi-port EMA provides 1 Electrical port and 7 RF ports for gas/water.EMA unregulated voltage is 6V to 13V. EMA regulated voltage is 5V. Regulated from EMA to EMTR-3 KV is 3.3V.PIC18F 4525 8MHzFCC ID: PN3Y72553-1Orion Transmitter Orion Transmitter Orion Transmitter
28 Universal Metering Transponder for kV2c™ Meter User GuideFunctional Description of the UMT-C-KVThe interface between the EMTR-3-KV and the UMT-C-KV is an Inter-Integrated Circuit (I2C) physical layer over which the Common Data Layer communications format operates. The UMT-C-KV performs the gateway function of connecting the EMTR-3-KV to the TWACS network. TWACS is able to read and write registers as well as execute Opcodes on the EMTR-3-KV using gateway functionality. The UMT-C-KV maintains a status indication of the EMTR-3-KV interface as well as a summary of EMTR-3-KV reported failures. The EMTR-3-KV is optional and may not be present on all UMT-C-KV units.REGULATORYDATAThis equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: reorient or relocate the receiving antenna, increase the separation between the equipment and receiver, connect the equipment into an output on a circuit different from that to which the receiver is connected, consult the dealer or an experienced radio/TV technician for help.Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.Changes not expressly approved by Distribution Control Systems, Inc. could void the user’s authority to operate the equipment.On-Request ReadsUMT-C-KV registers can be read directly using this command. Individual or groups of meters may be read using the TWACS two-way addressing features. See Two-Way Address.
Universal Metering Transponder for kV2c™ Meter User Guide 29Chapter 2 • Functional DescriptionTemperature MonitoringAs an additional safety feature, a solid state temperature sensor within the UMT-C-KV module measures the internal temperature of the transponder PCB. If, at any given time, the PCB temperature measured by the thermal sensor is greater than the value stored in the “Temperature Threshold” register, the module will not fire, even if the thermal limits controlled by the module firmware have not been reached.If any of the thermal limits are reached, (even if the measured temperature indicates that the transponder's internal temperature is lower than the temperature threshold) the transponder will not fire.Two registers store transponder temperature data in degrees Celsius:• Temperature Threshold register #736• Internal Temperature register #735The accuracy of the thermal sensor is within 6 °C in the range from - 40 °C to + 125 °C. The resolution of the “Internal Temperature” register is within 1 °C in the range - 40 to + 125 °C. The Internal Temperature register is updated at power-up and every 30 seconds thereafter. When the thermal limit of the transponder is disabled through hardware, the temperature sensing limits are bypassed and over-temperature safeguards will not cause the transponder to cease Inbound transmissions.Historical DataAll quantities captured by the meter data registers (at the time specified by the Meter Data Daily Shift Time - Register #332) are stored for up to 7 days. Historical Data also includes a copy of all the Meter Data Registers when the Billing Shift occurs.480 Volt ApplicationsAs is widely recognized within the industry, whenever dealing with 480 volt applications, there are some inherent challenges and risks associated with such high voltages. WARNING: The modes of failure in such applications may naturally be more aggressive than in lower voltage applications. This is an issue with the industry’s use of 480 volt applications and is by no means limited to GE meters.Calibration TestingAll models support calibration testing of the integral watt-hour meter using standard meter test equipment. When calibrating an kV2c meter, the optical port is used to output pulses to the test equipment. The UMT-C-KV transponder uses a serial link to the optical port for communication with the meter. The transponder communication must be suspended during meter calibration. This can be done by sending a time sync command containing a Date 0 Time 0x8700. This indicates an invalid time and the transponder will not attempt to communicate.
30 Universal Metering Transponder for kV2c™ Meter User GuideTWACS InstallationNOTEIf a power down occurs during calibration and the real-time clock has a valid time, the invalid time sync would need to be sent again.OptionsIf a kV2c meter supports KYZ/Form A functionality, the operations of the UMT-C-KV module shall not, in any way, adversely affect the performance of the KYZ/Form A inputs or outputs. TWACS InstallationThis section provides an overview of the integration and installation process and procedures for verifying that the meter is properly reading and communicating with the network.Type and Model NumbersA complete listing of all DCSI Remote Communications Equipment and the applicable meters can be found on the TWACS portal in the Transponder Type and Model Matrix. If you do not have access to the portal, contact Customer Care at Care@twacs.com for assistance.The following table provides module type, model number, class, voltage, service, and Energy per Count for each form that is usable with the transponder and meter. Table 2.8Model number, class, meter form, voltage, service type, and energyType 101ModelNumber Class Form Voltage ServiceEnergy Per Count1 200 1S 120V-480VAutorange 2-Wire Single Phase Self-Contained 0.00252 200 2S 120V-480VAutorange 3-Wire Single Phase Self-Contained 0.00253 320 2S 120V-480VAutorange 2-Wire Single Phase Self-Contained 0.003754 20 3S 120V-480VAutorange 2-Wire Single Phase Current Transformer Rated 0.00255 20 4S 120V-480VAutorange 3-Wire Single Phase Current Transformer Rated 0.000256 20 45S 120V-480VAutorange 3-Wire Polyphase Current Transformer Rated 0.000257 20 36S 120V-480VAutorange 4-Wire Polyphase Current Transformer Rated 0.00025
Universal Metering Transponder for kV2c™ Meter User Guide 31Chapter 2 • Functional DescriptionVoltage Transformer (VT) Connected Meter/TransponderTWACS-enabled kV2c meters that are configured for Voltage Transformer (VT) connected installations must be treated differently than kV2c meters designed for direct line voltage applications. VT-type kV2c meter/transponder hardware combinations are not compatible with any other kV2c meter/transponder combinations and are, consequently, not interchangeable. kV2c VT-type meter/transponder combinations are designed to operate exclusively on either the primary or the secondary winding side of voltage transformers with nominal secondary voltage of 120V ± 15%. CAUTIONInstallation of the VT version of a TWACS-enabled kV2c meter on direct line connected locations without Voltage Transformers could lead to destructive failure of the device during TWACS communication.All VT connected meter/transponder combinations are configured at the time of integration with the necessary parameters for proper TWACS communication.NOTEInstalled meters, or meters in the meter shop, can not be retrofitted for VT applications. New VT meters only must be installed for VT applications.8 20 8S/9S 120V-480VAutorange 4-Wire Polyphase Current Transformer Rated 0.000259 200 12S 120V-480VAutorange 3-Wire Polyphase Self-Contained 0.002510 320 12S 120V-480VAutorange 3-Wire Polyphase Self-Contained 0.0037511 200 15S/16S 120V-480VAutorange 4-Wire Polyphase Self-Contained 0.002512 320 15S/16S 120V-480VAutorange 4-Wire Polyphase Self-Contained 0.0037513 20 3S 120V 2-Wire Single Phase Voltage Transformer-Rated 0.0002514 20 4S 120V 3-Wire Single Phase Voltage Transformer-Rated 0.0002515 20 45S 120V 3-Wire Polyphase Voltage Transformer-Rated 0.0002516 20 36S 120V 4-Wire Polyphase Voltage Transformer-Rated 0.0002517 20 8S/9S 120V 4-Wire Polyphase Voltage Transformer-Rated 0.00025Type 101ModelNumber Class Form Voltage ServiceEnergy Per Count
32 Universal Metering Transponder for kV2c™ Meter User GuideTWACS InstallationVerification of EquipmentAvoid damaging the equipment by verifying that the meter, defined by the nameplate, is compatible with the field socket wiring. Refer to the supported field installation wiring diagrams in the UMT-C-KV Field Installation Instructions located on the TWACS portal.Verify that the meter nameplate has the correct form number, class number, and voltage. Refer to Figure 2.5 for approximate location of this information on the meter label.Figure 2.5 Meter nameplateNOTERefer to Table 2.8 for information on the form, class, voltage, and Kh.Installation ProcedureRefer to the appropriate manufacturer meter installation documentation and your company procedures for the proper safe installation of electric utility meters. For specific installation instructions, refer to the UMT-C-KV Field Installation Instructions located on the TWACS portal.WARNING: When the meter is firmly seated in the base socket, the conductors in the meter socket are energized.Class KhFormVoltage
Universal Metering Transponder for kV2c™ Meter User Guide 33Chapter 2 • Functional DescriptionTo complete the installation process, the meter must be searched into the TWACS operating software. The following steps provide a general overview of this process. More detailed information is available in the TNS End User Guide and the TWACS Network Gateway Operational Process Guide.1. Obtain, from the installer, the following information for the installed meter. There are seven pieces of information that identify the location and communication path and address information of the meter:•TWACS Serial number (required)•Substation (required)•Bus identification•Feeder identification•Phase•Phasor (TNG)•Transponder Type: 1012. Enter the necessary information into TWACS operating software by following the directions in the subsection Searching Meters into TNS, in the Searching Meters chapter of the TNS Operational Process Guide.3. The software will start the search process.Once in the database, the meter is ready for AMR or On-Request reads. RegistersThe Altimus Command Parameters window shows all registers that can be read for the type of meter selected and the registers that will be read for the rate class (selected registers, customer class, meter model) and billing type selected (BILLING or DSHTBILL). Set up the Altimus Command Parameters table by following the instructions in the TNS System Administration chapter of the TNS End User Guide.Thermal LimitThe transponder generates a significant amount of heat when replying to a command; the longer the command, the greater the amount of heat. Each transponder type has a message length limit, defined in the transponder specification and in the Product table. In the Altimus Command Configuration window, you can see how TNS will break up the reply into segments to avoid exceeding the thermal limit of the transponder.See the TNS System Administration chapter of the TNS End User Guide.
34 Universal Metering Transponder for kV2c™ Meter User GuideTWACS InstallationChanging the Sequence DelayNormally it is not necessary to change the sequence delay. In the event that it is necessary to change the sequence delay for one or more rate classes (because of insufficient time between read commands to permit adequate transponder cooling), the Altimus Command Configuration window is used.Change the rate class sequence delay by following the instructions in the TNS System Administration chapter of the TNS End User Guide.See Meter Shop Test System on page 39 for more information on testing tools
Universal Metering Transponder for kV2c™ Meter User Guide 35CHAPTER3TROUBLESHOOTING The purpose of this chapter is to provide DCSI customers with procedures that will assist in determining if a failed meter issue can be resolved in TNS or if a field visit is required. It is useful for installers and meter shop personnel.A failed meter or a meter with an invalid response can be the result of several factors including process, software, or hardware. The following sections provide steps for, first, trying to identify the problem in TNS (Complete the steps in Performing Remote Analysis (TNS)), and then conducting a field visit if necessary. If a field visit is required, proceed to Field Troubleshooting on page 38. Follow the instructions in Meter Shop Test System on page 39 if the TNS analysis and field visit steps do not correct the problem.Use a three-phase approach to troubleshoot the UMT-C-KV.1. Remote Analysis2. Field Troubleshooting3. Meter Shop Test SystemFor information on loss of power, refer to Loss of Power Handling on page 18. The UMT-C-KV may spontaneously draw a current surge if TWACS inbound communication takes place during the test. This may affect the test equipment or results. This can only occur when the SCE sends an outbound command requesting a response from the UMT-C-KV.Performing Remote Analysis (TNS)Complete the following steps to determine if a field visit is required for an unresponsive meter. You can end the procedure at any step and correct the problem when a cause of failure is determined.1. Check the AMRCOMMFAIL table for TWACS serial numbers that have excessive AMR Communication Failure counts. This enables you to identify meters that are consistently failing AMR.If the meter fail count in the AMRCOMMFAIL table is equal to or greater than the MaxFailCnt in the TNSDEFAULTS table, the Quality Code (QC) will be set to RO (Retry Override). When the quality code is RO, the meter unit map will have changed in the AMRCMDLST2WAY table. The meter will be attempted the first time, but will not be issued subsequent retries and must be read manually.
36 Universal Metering Transponder for kV2c™ Meter User GuidePerforming Remote Analysis (TNS)2. Determine if any error messages have occurred during AMR by checking the SCE Notification log for any associated hardware issues for the meters that are not communicating.NOTEThe Notification log contains important information about the status of equipment and is automatically updated by TNS and the SCE. For detailed information about the Notification log and error messages, see the Notification Log section of the SCE Logs chapter in the TNS Operational Process Guide and the Notification Log section in the SCE Maintenance chapter of the TNS End User Guide.3. Check for TNS errors that may have occurred because of commands time-out, or any software related issues in TNS that may have prevented AMR commands processing.For more information on time-out issues, see the Encode Command Parameters section in the TNS System Maintenance chapter of the TNS End User Guide.4. Perform an On-Request AMR command to determine if the unit communicates. (This command communicates to the unit by serial number to eliminate a two-way addressing issue.)For more information about On-Request meter reads, refer to the appropriate sections in the TNS End User Guide and the TNS Operational Process Guide.A site visit is not required, and you may stop this procedure if the meter communicates. If the meter communicates, check two-way addressing. (For more information on two-way addressing, see the Function-Group Addressing chapter of the TNS Operational Process Guide and the Two-Way Addressing section in the TNS Generic Applications chapter of the TNS End User Guide.) 5. Check for other TWACS meters that are reading on the same distribution transformer, or a nearby meter to narrow the communication problem area.6. Check the Customer Information System for a disconnected status that may not have updated in the TNS database. If the meter was disconnected, no action in TNS is required, but you may want to change the cycle number.The TNS Operator must have some process for dealing with a meter that no longer provides a read. The TNS Operator might consider setting up a special cycle (e.g. cycle 99) for disconnects and continue reading the meters. Having the disconnected meters in a special cycle allows the TNS Operator to isolate meters to scan for usage. If a Customer Service Representative re-activates the service and the notification fails to reach the TNS Operator, or if a customer tampers with the meter and reconnects the service, the TNS Operator can quickly identify a successful read in a group of meters where reads should normally fail. Using this configuration, the TNS Operator can quickly investigate the reason for the successful read of a supposedly disconnected meter.
Universal Metering Transponder for kV2c™ Meter User Guide 37Chapter 3 • Troubleshooting7. Check for switching events which may have occurred in the system that possibly changed the communication path of the meter. (A communication path may have changed due to a physical move or a temporary switch to a different substation, phase, or other path component.) If the communication path has changed, you can use Pathmaps to update the TNS database.For more information on communication paths, see the Adding Meters Interactively section in the Searching Meters chapter of the TNS Operational Process Guide. For more information on Pathmaps, see the Alternate Pathmaps Search chapter in the TNS End User Guide and the Building and Searching Alternate Paths chapter in the TNS Operational Process Guide.8. Check the Alternate Substation tables for up-to-date information on Alternate Substations that can feed the primary sub.For more information on Alternate Substation tables, see the Adding Alternate Substation Information section in the SCE Maintenance chapter of the TNS End User Guide. Also see the Alternate Substation Mapping and Creating and Using Alternate Path Tables sections in the Building and Searching Alternate Paths chapter of the TNS Operational Process Guide.Performing Remote Analysis (TWACS NG)Complete the following steps to determine if a field visit is required for an unresponsive meter. You can end the procedure at any step and correct the problem when a cause of failure is determined.1. If communication fails to the transponder, check the path and search state of the transponder. You may do this by going to System Monitoring > Edit Path > Search States.2. Type in the serial number of the transponder, and click Lookup.If the transponder is currently in the New, Lost or Tentative path state, the the TWACS NG will need to search the transponder. The TWACS NG Operator will need to be sure that it is in a search state of Ready. The search batch job should automatically pick up the transponder for search when the next job runs.3. If the transponder is in a Good/Done state, the TWACS NG Operator may issue a ping to the transponder. You may do this by going to System Monitoring > Test Transponder screen.4. Type in the serial number or Meter/End Device ID, and click Ping.If the ping is successful, communication to the transponder is successful and has been verified. If the transponder is still not functioning as expected, a field visit will most likely be necessary.5. The TWACS NG Operator may also want to check the notifications to verify if any have been received for the transponder in question. For more information regarding notifications, refer to the Notifications section of the TWACS® Network Gateway Operational Process Guide.
38 Universal Metering Transponder for kV2c™ Meter User GuideField Troubleshooting6. If the previous steps determine that the meter has “Failed”, see on page 40 to return the meter.NOTEFor additional information regarding remote troubleshooting, contact DCSI Customer Care (email care@twacs.com or call 1-800-892-9008) to speak with a Technical Support Engineer.Field TroubleshootingThe most likely field troubleshooting scenario is a failure to display. If the Communication icon is not displaying, ensure that the TWACS-enabled kV2c meter is receiving the appropriate power according to its specific form and voltage (refer to Table 2.8 on page 30). You may use a Portable RCE Test Unit (PRTU) and the PRTU Technical Manual for further testing or return the meter to the Meter Shop for further diagnostics.WARNING: Wear all safety equipment according to your utility rules before opening the meter base: hard hats, safety face shield, fire retardant clothing, high voltage rated gloves, safety rated shoes.WARNING: Any work on or near energized meters, meter sockets, or other metering equipment can present a danger of electrical shock. Such shock could cause serious injury or death.Complete the following steps if you determine a field visit is necessary. You can end the procedure at any step and correct the problem when a cause of failure is determined.1. Once on site, verify the correct TWACS serial number is installed at the site.2. Determine if the meter is operational by performing a voltage check, verifying the meter is the correct form and class for the application, and making sure the service transformer is at least a 3 KVA transformer or greater.3. Determine if the meter is disconnected at the service transformer or booted on the line side of the meter base. 4. Remove the meter and check for loose connections in the meter base or any other type of defect that may prevent the meter from communicating through TWACS power line communication.(( ))
Universal Metering Transponder for kV2c™ Meter User Guide 39Chapter 3 • Troubleshooting5. Replace the meter and verify that the Communication icon appears on the meter display. This icon should display approximately 5-8 seconds after power up. The icon also displays briefly each minute thereafter, if a valid time sync has been received.6. Use the Portable RCE Test Unit (PRTU) to confirm that the TWACS module is communicating. NOTEIf a PRTU is not available, communication with the meter can be verified using TNS. 7. Instruct the TNS Operator to search the unit into the TNS database while a technician is on site.8. If the meter does not communicate, or if a power up indicator is not validated, replace the meter and repeat steps 6 and 7.9. If the previous steps determine that the meter has “Failed”, complete the on page 40 to return the meter.IMPORTANTContact DCSI Customer Care (email care@twacs.com or call 1-800-892-9008) and arrange to speak with a Technical support Engineer if a new meter does not successfully communicate from the same site.Meter Shop Test SystemUse the Meter Shop Test System to test TWACS signaling, read select transponder registers, zero select transponder registers, and perform various other transponder functions on a TWACS-enabled kV2c meter. For complete details on the Meter Shop Test System, see the Meter Shop Test System Help (accessed by clicking the Help button on the Meter Shop Test Tool main menu) or contact your Program Manager or DCSI Customer Care at care@twacs.com or 1-800-892-9008.Because of the various test equipment available for use with DCSI products and the configuration requirements/options, the Meter Shop Test System Set-Up Guide, will guide you through initial equipment selection and setup for meter/module testing. This UMT-C-KV user guide contains all the module-specific information necessary to test the UMT-C-KV installed in the kV2c meter. UMT-C-KV module, TWACS serial number, and meter-specific information is available on the meter label. Refer to Figure 2.5 on page 32. Additional information, such as module Type and Model, can be found in Table 2.8 on page 30 of this user guide.If you are unable to resolve a problem with the UMT-C-KV, return the meter to your integrator or DCSI. See Product Returns on page 3.NOTETo use the Meter Shop Test System optical port communication option with a TWACS-enabled kV2c meter, you must have an Optical Port Cable Assembly (see Figure 3.1).(( ))
40 Universal Metering Transponder for kV2c™ Meter User GuideMeter Shop Test SystemFigure 3.1 Optical port connection for kV2c meterNOTETo use the Meter Shop Test System serial communication option with a TWACS-enabled kV2c meter, you must have the correct SIA Cable Assembly (see Figure 3.2).Figure 3.2 SIA cable assembly for kV2c meterSIA Cable AssemblyY71119-1
Universal Metering Transponder for kV2c™ Meter User Guide 41CHAPTER4SPECIFICATIONSThis chapter contains electrical, environmental, and physical specifications for the UMT-C-KV transponder.Electrical SpecificationsCompliance SpecificationsNOTEANSI C12.1-2001 is the referring standard for tests listed in tables 3.2, 3.3, and 3.4. Table 4.1Electrical ratingsParameter RatingLine voltage 120-480 VAC +/- 15%Line frequency 60 Hz +/- 3.0 HzQuiescent power 1.35 Watts not including TWACS or RF activityMaximum input surge 25 amps RMSInternal fusing Yes on AC connection for TWACSGrounding NoneElectronics connection DC energy is provided by the kV2c MeterElectronics isolation Electronics are not required to be electrically isolated from the power line.Table 4.2Compliance specificationsTest Title Applicable SpecificationEMI/RFI Emission conducted/radiated ANSI C12.1-2001 Test No. 27- “Radio Frequency Conducted and Radiated Emissions” per CFR 47 Part 15, Class A and B. (See also ANSI C63.4)EMI/RFI Susceptibility ANSI C12.1-2001 Test No. 26- “Effect of Radio Frequency Interference”Canada: LMB-EG-07 & PS-E-09-EAC line surge ANSI C12.1-2001/IEEE C62.41-1991 Test No. 17- “Effect of High Voltage Line Surges”Canada: 61000-4-4:2004Electrical fast transient ANSI C12.1-2001 Test No. 25- “Electrical Fast Transient/Burst” (Testing at 100 KHz is required) IEC 61000-4-4: 2004
42 Universal Metering Transponder for kV2c™ Meter User GuideEnvironmental SpecificationsEnvironmental SpecificationsSurge withstand capability FT and OSC ANSI/IEEE C.37.90.1 - 2002High voltage isolation on meter chassis ANSI C12.1-2001 Test No. 15- “Insulation”.Canada: LMB-EG-07 & PS-E-09-EVoltage interruption test ANSI C12.1-2001 Test No. 16- “Voltage Interruption”.Electrostatic Discharge ANSI C12.1-2001Test No. 28 “Effect of electrostatic discharge (ESD)”.Variation of Voltage ANSI C12.1-2001Test No. 5 & 5a “Effect of variation of voltage on the metering device”.Variation of Frequency ANSI C12.1-2001Test No. 6 “Effect of variation of frequency”.Dielectric Voltage ANSI C12.1 Test for: Withstand, Abnormal Voltage Operation, and Faults.Circuit spacing Circuit spacing complies with sound engineering principles for 480-volt class equipment.ITIC (CBEMA) IEC 61000-4-11.Effect of Variation of Voltage Test No. 5 & 5a, performed at 80% to 115% of rated voltage, with 5% or smaller steps.Effect of Variation of Frequency Test No. 6.Effect of External Magnetic Field Test No. 18.Occupied Bandwidth 200 kHz.RF Output Power 0 dBm or less. The EMTR-3 KV meets FCC section 15.249 for field strength of emissions.Carrier Frequency Stability Carrier frequency is crystal controlled. Accuracy is +/- 50 ppm, or about +/- 46 kHz.Table 4.2Compliance specificationsTest Title Applicable SpecificationTable 4.3Environmental specificationsThermalEffect of operating temperature Per ANSI C12.1-2001 Test No. 30HumidityEffect of relative humidity, both operational and storage Per ANSI C12.1-2001 Test No. 31
Universal Metering Transponder for kV2c™ Meter User Guide 43Chapter 4 • SpecificationsPhysical SpecificationsTable 4.4Physical specificationsParameter SpecificationSize, weight, form factorIntegrated dimensions 6.94 in. dia. x 8.2 in. lng. - Refer to General Electric specifications for kV2c meter Integrated weight kV2c meter w/ plastic cover 2 lbs. Integrated kV2c w/plastic cover 3.5 lbs.Meter forms See Table 2.8, “Model number, class, meter form, voltage, service type, and energy”.Installation instructions Installation instructions can be downloaded fromthe DCSI Web portal (https://portal.twacs.com). Meter socket ANSI C12.7-1987 Compliance Testing SpecificationsMechanical tests• Mechanical Shock• Mechanical Vibration• Transportation Drop Test• Transportation VibrationPer relevant sections of ANSI C12.1 - 2001 described below:• Test #32, per IEC 60068 part 2-27• Test #34, per IEC 60068 part 2-6• Test #33, per ISTA Test Procedure 1A• Test #35, per ISTA Test Procedure 1ALabeling Requirements, Faceplate and Serial NumberAll modelsLabeling per ANSI C12.10-1987 and/or customer specifications for:•TWACS logo• Model number• Model number barcode• TWACS serial number• TWACS serial number barcodeThe TWACS Serial Number is embedded in the utility's meter number. It must be a distinguishable field of the meter number, or may be duplicated elsewhere on the faceplate. The serialized electronics and faceplate must be kept together.
44 Universal Metering Transponder for kV2c™ Meter User GuideAdditional Regulatory DataAdditional Regulatory DataThe following is a tabulation of regulatory data found elsewhere in this manual and is required by the regulatory agencies of some countries.Physical Tamper ProtectionMeter seal SupportedTable 4.4Physical specificationsParameter SpecificationTWACSSerialNumberParameter SpecificationDisclaimer noting that operation of the device is subject to conditions and that the device may not cause harmful interference and device must accept any interference received.Regulatory Data note on page 28.Principles of device operation All of Chapter 2.Block diagram Page 27.Operating frequency 902-928 MHz, page 27, paragraph 1.Channeling Page 27, paragraph 1.Mode of transmission Page 27, paragraph 1.Internal/External data source Page 27, paragraph 1.Type(s) of modulation Frequency Shift Keying, page 27, paragraph 1.Is a subcarrier used to modulate carrier? No. Page 27, paragraph 1.Type of information transmitted Digital data, page 27, paragraph 1.Occupied bandwidth 200 kHz, page 42, third-to-last item in table.RF output power FCC 15.249 compliant, page 42, second-to-last item in table.Carrier frequency stability +/- 50 ppm or +/- 46 kHz, page 42, last item in table.
Universal Metering Transponder for kV2c™ Meter User Guide 45AC Alternating CurrentADLC Asynchronous Data Link CommunicationAMR Automatic Meter ReadingANSI American National Standards InstitutionASCII American National Standard Code for Information ExchangeCIS Customer Information SystemDC Direct CurrentDCSI Distribution Control Systems, Inc.IEEE Institute of Electrical and Electronics EngineerskWh Kilowatt HoursLCD Liquid Crystal DisplayMC Master ControllerMS Master StationMSTT Meter Shop Test ToolNS Register Not SupportedPRTU Portable RCE Test UnitRCE Remote Communications EquipmentRMA Return Material NoticeRTC Real Time ClockSCE Substation Communications EquipmentTCT Test Communication ToolTNS TWACS Net ServerTWACS Two-Way Automatic Communication SystemTWACS® NG TWACS® Network GatewayUMT Universal Metering TransponderAcronyms
46 Universal Metering Transponder for kV2c™ Meter User GuideAcronyms
Universal Metering Transponder for kV2c™ Meter User Guide 47addressAn assigned unique, fixed number to a memory location in order to retrieve or store data.Automatic Meter Reading (AMR)Electronic accumulation and transport of meter data. The process of reading a meter from a remote location at scheduled times or on demand.binsA register to store the read data.busAn electrical common connection through which power is distributed.bus identificationIdentifies the substation bus to which DCSI equipment is connected.Central Control Equipment (CCE)The top level of the TWACS hierarchy, also referred to as the master station. The CCE typically resides at the utility home office, providing system control and data storage for TWACS.Customer Information System (CIS)A computer database that utilities use to keep track of their customer information (name, address, phone, meter serial number). Often includes bill printing functionality.energized meterA meter that is electrically chargedfeeder identificationIdentifies which feeders are connected to which bus(es).hourly intervalA statistical count of hourly usage.integrationThe installation of the transponder into the meter.Master Controller (MC) or Master Station (MS) The equipment at the utility's home office that provides system control, data storage, and user interface functions for the system. Glossary
48 Universal Metering Transponder for kV2c™ Meter User GuideGlossaryMeter Shop Test Tool (MSTT) A software product developed by DCSI that performs troubleshooting and testing of meters.non-volatile dataData that is preserved even when the electrical power is off.phaseThe current supply conductors, other than the neutral conductor of a polyphase circuit, that usually carry the designation phase A, phase B, or phase C.Portable RCE Test Unit (PRTU)Portable unit for testing a TWACS-enabled device at a customer site. The PRTU, used in conjunction with a laptop running Meter Shop Test Tool software, generates and decodes TWACS signals for communication with a TWACS-enabled device.pulse accumulationA device that accepts and stores pulsesregistersDevices, such as transponders, located at a consumer's premises that collect and transmit register data through TWACS.Remote Communications Equipment (RCE)The base of the TWACS hierarchy. RCEs consist of the DCSI family of transponder products. RCEs are located at customer sites and interface TWACS communication with various end devices such as meters, water heaters, and air conditioning units to enable automatic meter reading (AMR), load management, or other functions.rolloverAn event, when the meter reading changes from its maximum value to zero.Substation Communications Equipment (SCE) The middle tier of the TWACS hierarchy, consisting of all TWACS substation equipment (CRU, OMU, IPU, and MTU). The SCE transmits and receives data between the Master Station and RCE. synchronizationA means of ensuring that both transmitting and receiving units are operating together.tamperingTo alter improperly
Universal Metering Transponder for kV2c™ Meter User Guide 49GlossaryTotal Consumption (TC)The total electrical usage (in kWh) for the specified type of meter read.transpondersTwo-way field devices that can receive and send messages to and from the substation.TWACS Next Generation (TNG) or TWACS Net Server (TNS)Chief component of the entire Two-Way Automatic Communication System. Manages all collected metering and interval data as well as the connection between the utility and the consumer’s premises.Two-Way Automatic Communication System (TWACS) A patented technology that allows the utility to send and retrieve information to and from meters and other devices using the utility’s power lines as a communication network.Universal Metering Transponder (UMT)An electronic assembly integrated into an electric meter to add TWACS communications capability to the meter.volatile dataData that is lost when the electrical power is off.
50 Universal Metering Transponder for kV2c™ Meter User GuideGlossary
Universal Metering Transponder for kV2c™ Meter User Guide 51Numerics480 volt applications 29AAC input voltage 25addressing modes 15TWACS-10 15TWACS-20 15Altimus Command Configuration 33AMR 33ANSI 12Bbus identification 33Ccalibration testing 29care@twacs.com 3compliance specifications 41consumption 17Customer Care 3Ddaily shift 12data retrieval 13daylight saving time 10demand reset 23Eelectrical specifications 41EMTR-3 26energy 17energy and demand measurement 22environmental specifications 42Ffaceplate 43feeder identification 33functional description 9, 11Hhistorical data 29hourly reads 12Iinbound generation circuitry 12interval data 17Llabeling requirements 43Mmaintenance 40Master Station 6Meter 39meter data registers 26meter map registers 26meter shop testing 39meter socket 12microprocessor 12Nnonvolatile memory 12OOn Request Read 33outage duration 19outage monitoring 28outbound detection circuitry 12Pphase 33physical specifications 43polyphase 20polyphase commercial meter 10portal 3power loss detection 12RRemote Communications Equipment 6response modesTWACS-10 16TWACS-20 16return procedures 40Ssequence delay 34serial communication port 13serial date 9serial number 33serial number address 13serial port 12serial time 9serial time units 9Set Date/Time command 9specificationscompliance 41electrical 41environmental 42physical 43STUIndex
52 Universal Metering Transponder for kV2c™ Meter User GuideIndexSee Serial Time Unit 9substation 33Substation Communications Equipment 6support 3TTechnical Support 3temperature monitoring 29theory of operation 9, 10time synchronization 17, 25time-of-use 18TNS 6, 33primary functions 6TNS Operational Process Guide 4transformer 25troubleshootingfield 38TWACSthree levels of components 6TWACS-10 Communication Protocol 14TWACS-20 Communication Protocol 14two-way address 13Two-Way Automatic Communication Systeminbound generation circuitry 12outbound detection circuitry 12Vvoltage transformer 25WWrite RCE Register command 14

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