Unique Identifier: 34-1635 - Prepayment Electricity

1 ESKOM COPYRIGHT PROTECTED B Morrison / November 2010 / Rev 1 SPECIFICATION Document Classification: Controlled Disclosure Title: Distribution Specification Part 25: PARTICULAR REQUIREMENTS FOR Prepayment METERS Unique Identifier: 34-1635 Document Type: DSP Revision: 1 Published date: NOVEMBER 2010 Total pages: 24 Review date: NOVEMBER 2015 COMPILED BY APPROVED BY FUNCTIONAL RESP AUTHORISED BY _ _ _ _ _ _ _ _ J O KENNEDY _ _ _ _ _ _ _ _ J O KENNEDY _ _ _ _ _ _ _ _ PR GROENEWALD _ _ _ _ _ _ _ _ MN BAILEY Chief Engineer Study Committee for TESCOD CMDT for MD (Dx) DATE: 02/11/2010 DATE: 02/11/2010 DATE: 12/11/2010 DATE: .. Content Page Foreword .. 2 1 Scope .. 3 2 Normative 3 3 Definitions and abbreviations .. 4 Definitions .. 5 Abbreviations .. 5 4 Requirements .. 6 Fundamental requirements for meters.

2 6 Mechanical requirements .. 6 Conformal coating .. 7 Tamper sensor .. 7 Sealing .. 7 Marking of meter for all meter types .. 8 Interface port .. 9 Climatic requirements .. 12 Electrical 12 Functional 14 STS token entry and decryption .. 16 Other requirements .. 18 5 Packaging .. 18 Annex A Short Code instructions .. 19 Annex B - Impact assessment .. 21 DOCUMENT CLASSIFICATION: CONTROLLED DISCLOSURE PARTICULAR REQUIREMENTS FOR Prepayment METERS Unique Identifier: 34-1635 Type: DSP Revision: 1 Page: 2 of 24 ESKOM COPYRIGHT PROTECTED When downloaded from the IARC WEB, this document is uncontrolled and the responsibility rests with the user to ensure it is in line with the authorised version on the WEB. Foreword This specification was originally published in October 1993 as MC 171 Subsequent modifications to the specification took MC 171 to with additions like the meter interface port and standard indicator requirements.

3 MC171 has subsequently been re-formatted in accordance with the Eskom Documentation System and issued as SCSSCAAA9 rev 0 with minor modifications only. SCSSCAAA9 rev 1 and 2 introduced a number of small additions, mainly some minimum requirements for split meters and three-phase meters. Later additions include a standard meter map to replace the manufacturer meter map for the interface port as well as minimum requirements for split meters and three phase meters. With the adoption of the international IEC 62055 series of Prepayment specifications, significant modifications were required for the local, Eskom and SANS Prepayment specifications which all refer to the international specifications. This revised Eskom specification is therefore released as document DSP 34-1635 . Revision history This revision cancels and replaces revision no 0 of specification DSP 34-1635 .

4 Date Rev. Clause Remarks Nov 2010 1 Compiled By: J. O Kennedy Correct image for USB receptacle and include clearance dimensions. Dec 2009 0 All Compiled By: J. O Kennedy - The number document number change to 34-1635 Complete revision of original specification to refer to IEC 62055 series of specifications, as well as the new release of SANS 1524-1 - The associated STS Companion specifications are also used because STS has since been accepted as an international standard Authorisation This document has been seen and accepted by: Name Designation MN Bailey Corporate Manager Divisional Technology PR Groenewald Technology Development Manager (Control Plant) J O Kennedy Measurements Study Committee This specification shall apply throughout Eskom Holdings Limited, its divisions, subsidiaries and entities wherein Eskom has a controlling interest.

5 DOCUMENT CLASSIFICATION: CONTROLLED DISCLOSURE PARTICULAR REQUIREMENTS FOR Prepayment METERS Unique Identifier: 34-1635 Type: DSP Revision: 1 Page: 3 of 24 ESKOM COPYRIGHT PROTECTED When downloaded from the IARC WEB, this document is uncontrolled and the responsibility rests with the user to ensure it is in line with the authorised version on the WEB. Development team Name Designation J O Kennedy Eskom IARC Control Technologies E Makwarela Eskom IARC Control Technologies Keywords Meter, Prepayment , prepaid, ED, ECU, split meter, single phase, three phase, Electricity Dispenser, Electricity Control Unit. Bibliography Eskom Prepayment web site with specifications and requirements Eskom Distribution (subscription site) with electrification standards STS Association web site (The owners of the STS Specifications.)

6 1 Scope SANS 1524-1 specifies the minimum requirements for a Prepayment meter but it does not specifically deal with the product functionality. Many requirements in SANS 1524-1 incorporate various options and some requirements are currently only preferred options. This specification stipulates the detailed functional requirements to achieve the standardisation of Prepayment meters within Eskom and to ensure that the equipment will fulfil Eskom's specific needs. Since the original development of the Electricity Dispenser, various other concepts for Prepayment meters have been developed. While this specification makes provision for Electricity Dispensers [EDs] and Electricity Control Units [ECUs], it is also applicable for three phase Prepayment meters as well as for all variations of split Prepayment meter designs.

7 2 Normative references Parties using this document shall apply the most recent edition of the documents listed below: IEC 62051 Electricity metering Glossary of terms IEC 62052-11 Electricity metering - General requirements, Tests and test conditions - Part 11: Metering equipment IEC 62053-21 Electricity metering equipment ( ) Part 21: Particular requirements Static meters for active energy (classes 1 and 2) IEC 62055-21 Electricity metering Payment systems Part 21: Framework for standardisation IEC 62055-31 Electricity payment metering systems Part 31: Particular requirements Static payment meters for active energy (classes 1 & 2) DOCUMENT CLASSIFICATION: CONTROLLED DISCLOSURE PARTICULAR REQUIREMENTS FOR Prepayment METERS Unique Identifier: 34-1635 Type: DSP Revision: 1 Page: 4 of 24 ESKOM COPYRIGHT PROTECTED When downloaded from the IARC WEB, this document is uncontrolled and the responsibility rests with the user to ensure it is in line with the authorised version on the WEB.

8 IEC 62055-41 Electricity metering Payment systems Part 41: Standard transfer specification (STS ) Application layer protocol for one-way token carrier systems IEC 62055-51 Electricity metering Payment systems Part 51: Standard transfer specification Physical layer protocol for one-way numeric and magnetic card token carriers IEC 62055-52 Electricity metering Payment systems Part 52: Standard transfer specification Physical layer protocol for a two-way virtual token carrier for direct local connection BS 7856 Code of practice for Design of alternating current, watthour meters for active energy (classes 1 and 2) SANS 10142-1 The wiring of premises - Part 1: Low-voltage installations SANS 1524-1 Electricity payment systems - Part 1: Payment meters SANS 1524-1-1 Electricity payment systems - Part 1-1: Mounting and terminal requirements for payment meters SANS 1524-1-2 Electricity payment systems - Part 1-2: Specification for surge arresters for the protection of Electricity dispensers SANS 1524-4 Electricity payment systems - Part 4: National Prepayment Electricity meter cards SANS 15417 Information technology: Automatic identification and data capture techniques - Code 128 bar code symbology specification SANS 156 Moulded-case circuit-breakers SANS 767-1 Earth leakage protection units - Part 1: Fixed earth leakage protection circuit-breakers STS 101-1 Interface specification - STS 101-1: Standard transfer specification (STS) Physical layer mechanical and electrical interface for virtual token carriers STS Companion specification - STS : Standard transfer specification (STS) Meter function object.

9 Register Table for Electricity payment meters DSP 34-749 Eskom specification: Standard for sealing metering equipment DSP 34-1527 Eskom specification: Procedure for producing software process assessment documents. DPC 34-1466 Eskom specification: Procedure for the Request For Modification (RFM) on prepaid meters RES/RR/00/11740 Eskom specification: Accelerated Environmental Stress Test for Pre-payment metering 3 Definitions and abbreviations The terms and definitions given in IEC 62051, IEC 62052-11, IEC 62055-21, IEC 62055-31 and IEC 62055-41, as well as the following, apply: DOCUMENT CLASSIFICATION: CONTROLLED DISCLOSURE PARTICULAR REQUIREMENTS FOR Prepayment METERS Unique Identifier: 34-1635 Type: DSP Revision: 1 Page: 5 of 24 ESKOM COPYRIGHT PROTECTED When downloaded from the IARC WEB, this document is uncontrolled and the responsibility rests with the user to ensure it is in line with the authorised version on the WEB.

10 Definitions Active unit: The metering unit that plugs into the passive unit (or socket). The Active unit may often (but not necessarily) include the User Interface Unit. Base: The back cover of the active unit. The active unit will plug into a standard socket. Measurement Unit: As defined in SANS 1524-1 with the additional meaning that the term measurement unit may also be used to describe a complete meter where the Measurement Unit and User Interface Unit are contained inside a single device. Overcurrent Protection: A function provided by ECU to serve as a fault protection feature by disconnecting the load when a fault current is detected. Passive Unit: Also called a socket (for conformity with IEC terminology). The service connection is terminated in the passive unit and the active unit plugs into the passive unit.