ES3. PART A Metering Installation Requirements July 2015

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1 ES3 PART A Metering Installation Requirements July 2015

2 SCOPE This publication provides general information to assist with connection of metering equipment to Ausgrid s network. WARNING It is the responsibility of the user of this document to ensure that only the current version is being used. Ausgrid may amend this document at any time. Issue No. DOCUMENT AND AMENDMENT HISTORY Date Approved by Summary of Changes 1 June 2004 GM Network This document supersedes the following Customer Installation Advices (CIAs): CIA 1048D, 1211D, 1259, 1260, 1268 & 1277A 2 Jan 2007 M Practice & Procedures - Network 3 Sept 2009 M Installation Policy & Compliance DO&R 4 Feb 2014 M Installation Policy & Compliance NO 5 June 2014 M Network and Customer Technologies 6 July 2015 Network & Customer Technology Manager This document supersedes the previous version of ES3 and CIAs 1230, 1240, 1257, 1259, 1260A, 1268, 1277A, 1300B, 1302, 1303, 1304, 1311, This document supersedes the previous version of ES3 and CIAs 1321, 1324, 1330 This document supersedes the previous version of ES3 and CIAs 1344 and 1346 This document supersedes the previous version of ES3 and CIA 1383 This document supersedes the previous version of ES3 and CIA 1386 ISSN Published and printed by Ausgrid. Copyright, Ausgrid. This publication may only be reproduced with the permission of Ausgrid. All correspondence should be directed to: Chief Engineer Ausgrid GPO Box 4009 SYDNEY NSW 2001

3 CONTENTS 1 INTRODUCTION Definitions Provision of metering equipment Notification requirements for new metered installations METERING REQUIREMENTS FOR SMALL RETAIL CUSTOMERS Introduction Application of ToU and Flat Rate Metering Policy New Installations Existing Installations Metering requirements Metering equipment Standard metering configurations Non-standard metering configurations Protection of metering Number of meters per installation Customers with controlled loads Customers that remove controlled load E2 meter for controlled load use Load control unit (LCU) Mix of ToU and Flat Rate meters Transferring meters from a builders service to the permanent installation Relocating existing meters Flexible switchboard and panel wiring Standard wiring configurations for meters E1 Single phase single element electronic meter B1 Single phase element meter E2 single phase dual element electronic meter with controlled load E3 three phase single element electronic meter B3 three phase single element meter E3 two phase single element electronic meter Load control device wiring diagram Details required on the notification of service work form (NOSW) Application of tariffs Reading of Flat Rate metering equipment Reading of Time of Use metering equipment Metering equipment spacing requirements Single metered installations Multiple metering installations Single phase multiple domestic installations Commercial and multi-phase multiple domestic installations Automated metering reading (AMR) requirements Existing metering installations Fixing of metering equipment Metering requirements for embedded generation Details required on the notification of service work form (NOSW) Embedded generation metering requirements Net metered embedded generation requirements Registration of bi-directional energy flow in ToU meters Gross metered embedded generation requirements Gross metering configuration Gross metering configuration 1a Gross metering configuration Gross metering configuration Gross metering configuration Gross metering configuration Adding additional bi-directional metering General guide to follow Alternate Gross and Net metering configuration Energising metering Metering With Remote Data Acquisition Capability... 29

4 2.9.1 Remote communicating meters permitted to be removed METERING REQUIREMENTS TYPE 1-4 METERING INSTALLATIONS Notification requirements for new installations Notification requirements for existing installations Entry to Ausgrid substations Commercial agreements Information on existing Ausgrid metering equipment Metering data requirements Compliance with Ausgrid s safety plans Load control units (LCU) Labelling and contact details Location of Type 1-4 metering installations Checklist for Type 1 to 4 metering installations LOW VOLTAGE CURRENT TRANSFORMER METERING REQUIREMENTS Prior to commencement of switchboard installation Low voltage CT s Low voltage CT s supplied by Ausgrid Low voltage CT s not supplied by Ausgrid Low voltage CT primary conductor requirements General requirements of CT installation and secondary conductors CT metering test block requirements Secondary conductors Arranging metering for a low voltage CT installation HIGH VOLTAGE METERING REQUIREMENTS Instrument transformer compliance Provision for instrument transformer testing Voltage transformers Type 1 installations Single phase VTs Three phase VT VT secondary terminal boxes High voltage current transformers Type 1 Installations Type 2 Installations High voltage combined transformers High voltage metering installation documentation Marshalling box Secondary cables Metering panels and enclosures Earthing Fuse ratings Labelling Auxiliary supply Information required prior to electrification RETURNING OF METERING EQUIPMENT APPENDIX A SPECIAL NOSW FORM, METER TYPES APPENDIX B OBSOLETE ZELLWEGER ZE22/3 LOAD CONTROL RELAYS... 49

5 1 Introduction This document outlines Ausgrid s revenue metering installation requirements for all metered installations within the Ausgrid distribution area. The metering installation must also comply with the following requirements where applicable: The National Electricity Rules AEMO Metrology Procedure AEMO Service Level Procedures for MPB s and other associated AEMO procedures Ausgrid s Electrical Supply (ES) series of documents Ausgrid s Connection Policy, Connection Charges The customers connection contract with Ausgrid (under NECF) Deemed Standard Connection Contract Service and Installation Rules of NSW Ausgrid s Network Standard (NS) series of documents AS/NZS3000, The Wiring Rules General Guide to Metering Provision Type of Connection Metering Arrangement Provider of Metering Whole Current Less than 100 Amps (per metering point) Current Transformer Connected Greater than 100 Amps (per metering point) and High Voltage Flat Rate or ToU Whole Current Metering Type 4 Whole Current Metering ToU Type 1-4 Ausgrid Metering Provider of choice (Contestable Arrangements) Ausgrid Metering Provider of choice (Contestable Arrangements) ES3 Part A - Metering Installations 1 July 2015

6 1.1 Definitions AEMO ASP BASIC Meter Bi Directional Metering CCEW CEC Complying Generator Australian Energy Market Operator. Accredited Service Provider. A meter used in a Flat Rate Metering Installation. ToU electronic metering that is capable of measuring both energy consumption (Import) and energy generated back into the electricity network (export) Certificate of Compliance Electrical Work Clean Energy Council. Formerly the Business Council of Sustainable Energy. Under the NSW Solar Bonus Scheme this is a solar photovoltaic generator, a wind turbine, or a renewable energy generator of a class prescribed by the regulations, that: (a) has a generating capacity of no more than 10 kilowatts, (b) is installed and connected to the distribution network in a manner that provides for all the electricity generated to be supplied to the distribution network, (c) allows the relevant distribution network service provider to measure at any instant the amount of electricity supplied, (d) complies with, and is installed and connected in a manner that complies with any safety, technical or metering requirements that may be prescribed by the regulations or market operations rules, (e) Connected via a CEC approved inverter, (f) Is connected at a Small Retail Customers installation. Connection Application Connection Point CT Customer Installation Data Stream Export Energy Flat Rate Metering Gross Metering Connection Application. See Ausgrid s website for details Means the junction between the customers installation and the electricity network. Known as point of common coupling as per the Service and Installation rules of NSW. See the Service and Installation Rules of NSW for examples. Current Transformer For the purpose of this document, a Customer Installation is the whole or portion of a customer s private electrical installation that requires separate metering and an individual National Metering Identifier (NMI) for the purposes of the National Electricity Market (NEM). For example a block of 20 home units or flats will have at least 20 Customer Installations and possibly one or more common Customer Installations such as house lights, lifts and essential services. Data Stream means a stream of energy data or metering data associated with a metering point, as represented by a NMI. For example, a NMI will have multiple Data Streams where one or more meters or one or more channels or registers comprise a single meter. Each Data Stream is identified by a suffix, which is associated with the NMI to which it belongs. Electricity that is generated by the customer and delivered back to the Ausgrid Network (i.e. electricity delivered to the NEM electricity pool). A Type 6, accumulation or Basic metering installation. A metering system that measures the electricity generated by the Complying Generator system. ES3 Part A - Metering Installations 2 July 2015

7 ILAC Import Energy Load Control Unit (LCU) Meter Maintenance MRIM MDP MPA MPB NER NEM Net Metering Non compliant NMI NSW Trade and Investment NOSW Responsible Person Rule Compliant Small Retail Customer Special NOSW Solar Bonus Scheme Structure (Str) Time of Use (ToU) metering The International Laboratory Accreditation Corporation. Electricity that is drawn from the local distribution network and consumed or used within the customer s installation (i.e. electricity received from the NEM electricity pool). Load Control Unit means ripple frequency relay or a time switch that controls specific customer load. Refer to ES7 Application of Network Use of System Charges for further information on controlled load tariffs. Means the replacement or repair of any metering equipment as deemed necessary by Ausgrid. Meter Maintenance on electricity meters may only be conducted by Ausgrid. Manually Read Interval Meter - a meter used in a ToU Metering Installation. Meter Data Provider - A service provider accredited by AEMO and responsible for the collection, validation, storage and distribution of electricity meter data. Metering Provider A A service provider accredited by the NSW Trade and Investment and Authorised by Ausgrid (i.e. Level 2, Category 4 ASP), who is responsible for the installation of NER compliant whole current connected metering for sites < 160MWh energy consumption per annum for a NEM Responsible Person (e.g. Ausgrid Local Network Service Provider). Metering Provider B - A service provider accredited by AEMO and responsible for electricity meter supply, installation, maintenance, testing and repair of a metering installation. National Electricity Rules. National Electricity Market. A metering system that measures the excess energy generated and exported into the distribution network. For the purposes of this document this means an embedded generation system that does not meet the requirements of the NSW Solar Bonus Scheme National Metering Identifier. The Department of Trade and Investment, Regional Infrastructure and Services (NSW) who manage the accreditation scheme for contestable works within NSW. Notification of Service Work (Ausgrid). See ES4 for further details. The person who has responsibility for a metering installation for a particular Connection Point, being either the Local Network Service Provider (e.g. Ausgrid) or the Market Participant as described in Chapter 7 of the NERs. Rule Compliant is metering that complies with the requirements of the National Electricity Rules (Chapter 7) and associated procedures. A customer with an energy consumption of less than 160MWh s per annum. Special Notification of Service Work (Ausgrid) for Type 1-4 contestable metering and is completed by AEMO Accredited MPB s. See Appendix A. The NSW Government scheme which commenced on the 1st January 2010, which introduced a feed in tariff for all Complying Generators connected to a NSW distribution network. Is the electronic meter s program configuration identifier which identifies the measurement parameters of the meter. A Type 5, interval or MRIM metering installation. ES3 Part A - Metering Installations 3 July 2015

8 Type 1-4 Metering Installation Type 5 Metering Installation Type 6 Metering Installation VT A metering installation containing an electronic meter, or meters, capable of recording electrical energy consumption in 30 minute market intervals in accordance with the NER. The installation will also contain an approved communication device to enable the remote acquisition of the metering data. A metering installation containing an electronic meter, or meters, capable of recording electrical energy consumption in 30 minute market intervals in accordance with the NER. Such meters are read manually by meter readers. Data is down-loaded via probes into a hand-held data collection device carried by Ausgrid meter readers. Also known as an MRIM, ToU or interval meters. A metering installation containing a meter, or meters, (electronic or electromechanical) capable of recording cumulative electrical energy consumption only. Such meters are read manually by Ausgrid meter readers who record the total cumulative consumption readings displayed on the Type 6 meter register. All meters can support a Type 6 Installation, but they are predominantly installed with mechanical meters or simple electronic meters. Also known as BASIC, Flat Rate or accumulation meters. Voltage Transformer ES3 Part A - Metering Installations 4 July 2015

9 1.2 Provision of metering equipment The customer is required to fund the cost of connection to the network, refer to Ausgrid s Connection Policy Connection Charges. The Customer s ASP is also required to pay a capital contribution for the electricity meter used for any new or upgraded Type 5 or Type 6 installation. Arrangements for the provision of metering services vary depending on the arrangements described in this table: Table 1: Provision of metering equipment Customer Category Phases Connection Network Tariff Arrangement (11) Residential 1 Commercial WC Default Flat Rate Residential 3 Residential Embedded 1 Commercial WC Generation & Opt-In Residential 3 Time-of-Use Commercial 3 WC Default Time of Use Commercial 3 Residential Commercial Commercial (LV) CT Default Time of Use Retail Customer Category (8) Small (9) WC As per ES7 Small (9) (LV) CT 3 HV or Market Type Type 6 Type 5 Type 4 Large As per ES7 Type 1-4 (10) Metering Equipment Supply Installation Ownership Maintenance B1/B3 Meter Ausgrid (1) LCU Ausgrid (2) E1/E2/E3 Meter Ausgrid (1) LCU Ausgrid (2) ASP Ausgrid E4 Meter Ausgrid (3) LCU Ausgrid (2) Ausgrid CT Customer(4)(5) Customer Customer Meter MPB LCU Ausgrid (if requested) (2) MPB (7) Meter MPB MPB (7) CT Customer (4)(5) Customer Customer Meter MPB MPB (7) CT Customer VT Customer Customer (5) Customer Ausgrid Customer / MPB (7) Customer / MPB (7) ES3 Part A - Metering Installations 5 July 2015

10 Table 1 Notes: 1. An up-front fee applies for Ausgrid supplied meters. This fee is documented in Ausgrid s Connection Policy Connection Charges. 2. External LCUs are provided at no cost to ASPs or MPBs (if requested). 3. A fee applies to the installation of E4 meters. This fee is documented in Ausgrid s Connection Policy Connection Charges. 4. Ausgrid have available for sale LV CT s that comply with the requirements of this document 5. Where metering CTs are purchased from an external supplier (not Ausgrid) and installed within Ausgrid s distribution area, the customer must ensure that the CT s are Rule Compliant. Ausgrid will require test results certifying that installed CTs comply with the National Electricity Rules, see Section 3 for further details 6. The customer s metering installation, including any associated current and voltage transformers, must be located within the customer s installation and external to Ausgrid s substation or equipment. Refer also to NS 195 HV Customer Connections (HVCs). Where the customer s metering equipment was previously installed in Ausgrid s substation (e.g. a HV metering unit), or embedded within Ausgrid s switchgear (e.g. CTs and VTs), it must be relocated into the customer s installation and external to Ausgrid s equipment, at the customer's cost, where this metering equipment or switchgear requires replacement or alterations for any reason 7. Metering installation, ownership and maintenance arrangements are commercially negotiated between retailer and customer 8. Retail customer category is as per the National Energy Retail Law (NSW) Section 1, subsection 5 9. A small customer is a customer (a) who is a residential customer; or (b) who is a business customer who consumes energy at business premises below the upper consumption threshold of 100MWh per annum. 10. A large customer is a business customer who consumes energy at business premises at or above the upper consumption threshold of 100MWh per annum. 11. Network tariff will be assigned as per ES7 Application of Network Use of System Charges. 1.3 Notification requirements for new metered installations For all new Flat Rate or ToU metering installations, the metering installer must ensure a Retail contract is in place and then obtain an Installation Job Number from the local Ausgrid Field Operations office prior to installing metering and the site being energised. A completed 'Connection Application' must be submitted to Ausgrid to obtain the Installation job number. See our website for information on submitting connection applications. For all new Type 1-4 metering installations, the MPB is responsible for coordinating with the customer s licensed electrical contractor and ASP (e.g. service line installer) to ensure that the new metering is commissioned at the time the customer takes supply and complies with all the requirements defined in Ausgrid document ES 1 Premises Connection Requirements. Customer Installations must not be energised without a NER compliant Metering Installation installed. The procedures detailed in Ausgrid publication ES 4 Service Provider Authorisation must be followed for energising whole current installations. Mandatory inspections are required for sites greater than 100 Amps, see ES1 Premises Connection Requirements for further details ES3 Part A - Metering Installations 6 July 2015

11 2 Metering requirements for small retail customers 2.1 Introduction Ausgrid is responsible for the provision and maintenance of Flat Rate or ToU metering equipment for use on small retail Customer Installations located within the Ausgrid distribution network as required by the National Electricity Rules. The installation of these meters on new or upgraded installations must be installed by an Accredited and Authorised ASP (see Ausgrid policy document ES4 Service Provider Authorisation for further details) and comply with the Service and Installation Rules of NSW and this document. Ausgrid provides Flat Rate or ToU metering instruments for all new customer sites and for existing installations where Flat Rate or ToU metering is being altered, such as an increase in the number of phases or the separation of supply for different customer accounts. The supply of the metering instruments attracts an up-front charge The meters, provided by Ausgrid for Flat Rate or ToU metered customer sites, comply with the relevant National Electricity Rules requirements for Flat Rate or ToU Metering Installations. The meters are whole current 100 Amp, bottom-connected instruments. Installation or alterations of current transformer metering installations cannot be conducted by an ASP, only Ausgrid s metering provider may conduct this work. The following abbreviations will be used to describe the range of meters provided by Ausgrid: E1 single phase, single element, Whole Current 100A ToU interval meter E2 single phase, dual element, Whole Current 100A ToU interval meter, with pre-programmed controlled load facility (ripple frequency relay or time switch) as required. E3 3-phase, single element, Whole Current 100A ToU interval meter. (Note: This 3-phase meter must only be used to meter a single tariff). B1 single phase, single element, Whole Current 100A Flat Rate accumulation meter. B3 3-phase, single element, Whole Current 100A Flat Rate accumulation meter. (Note: This 3- phase meter must only be used to meter a single tariff). L Load Control Unit - a ripple receiver or time switch for up to 25A switching of resistive load. See clause for more information on the requirements for controlled load. Refer ES3, Part B Technical Specifications for Metering Equipment for details. Note: Single phase dual element Flat Rate accumulation meter (i.e. B2), is not available. Where load control is required at a Flat Rate metering installation an approved Ausgrid LCU must be utilised. Table 2 shows the standard whole current metering configurations for new and upgraded sites (e.g. increase in the number of supply phases or the addition of an embedded generator). 2.2 Application of ToU and Flat Rate Metering Policy Ausgrid provides both ToU and Flat Rate Whole Current metering equipment for ASPs to install at new and upgraded installations connected or proposed to be connected to Ausgrid distribution Network. ES3 Part A - Metering Installations 7 July 2015

12 2.2.1 New Installations As of 1 July 2014, the standard metering to be used for metering new connections to the Ausgrid distribution network will be a Flat Rate metering installation unless the requirements of this clause require a ToU metering installation to be installed. The following exceptions apply where ToU metering MUST be installed rather than Flat Rate: Any installation where embedded generation systems are installed (e.g. solar); A three phase <100A commercial (including residential house lights) or industrial metering connection 1, excluding Temporary Builders Supplies, which will be removed the when permanent supply and metering is installed; Customers who wish to be billed via a time of use or demand capacity tariff; Low voltage current Transformer metering installations which are not Type 1-4 (Ausgrid will install the meter in this case as this metering work is non contestable); It is critical that the ASP confirms with their customer if ToU metering is required. Ausgrid must be notified on the Connection Application stage for new and upgraded metering connections if ToU metering to support a time based tariff is required. If an ASP installs a Flat Rate metering installation which is not in compliance with this clause a defect will be raised against the ASP and the incorrect metering equipment must be replaced by the ASP with the appropriate ToU metering installation Existing Installations For existing connections which are proposed to be upgraded (e.g. additional phases) a like for like policy applies (i.e. where a ToU metering installation is being upgraded the new metering installed must be ToU). If a Flat Rate metering installation is being upgraded, a Flat Rate metering installation must be installed unless the exceptions of clause require a ToU meter to be installed. If an ASP is required to install additional metering at an existing single or three phase Flat Rate metering installation (e.g. the addition of single phase controlled load metering) and does not meet the exceptions of clause where a ToU meter must be installed, the ASP may leave the existing Flat Rate metering connected if it has a nameplate rating of 100A. The installed metering configuration must still comply with the requirements of table 2. 1 It is assumed these connections would have a network tariff EA302 applied (see ES7 Application of Network Use of System Charges ES3 Part A - Metering Installations 8 July 2015

13 Table 2 Standard and net metering configurations ES3 Part A - Metering Installations 9 July 2015

14 2.3 Metering requirements When installing new or altered metering it is essential that the minimum number of meters are used and all metering installations must contain the minimum number of Data Streams. The metering point must be located as close as practicable to the Connection Point as defined in the Service and Installation Rules of NSW. Where Metering Installations are changed or relocated, the metering enclosure must be accessible to Ausgrid staff at all times in accordance with the requirements set out in the Service and Installation Rules of NSW. ASPs seeking Ausgrid supplied meters are required to forward a completed Connection Application form (which is available at Ausgrid s website via ) Unless prior approval has been granted by Ausgrid to permanently disconnect a premises connection from the Ausgrid Network, or it is an Ausgrid approved unmetered supply, all premises must have revenue metering as per this document and the NER and installed to capture energy usage and/or generation prior to being energised. If metering equipment is removed, it must be returned as per clause 6 of this document Metering equipment Ausgrid s procurement policies allow for numerous metering manufacturers to supply ToU and Flat Rate metering equipment for use on Ausgrid s Network. When installing metering the ASP must ensure they have identified or specified the type of metering equipment that is to be installed as per clause 2.2, prior to constructing any metering panels or switchboards. See ES3 Part B, Technical Specifications for Metering Equipment for further technical details of metering equipment utilised in the Ausgrid Network area Standard metering configurations The standard metering configurations as set out in Table 2 are the preferred methods of metering all new or upgraded installations. All new metering installations where Ausgrid Flat Rate or Time of Use metering is installed shall comply with these requirements. All upgraded metering installations should comply with these requirements unless the ASP seeks alternate configurations as per clause below. Metering owned and installed by other MPBs need not comply with the configurations identified in table Non-standard metering configurations Any existing installations that require the installation of non-standard metering configurations as identified in Table 2 must be approved by the local Field Operations office prior to carrying out this work. Ausgrid s local Field Operations office should be contacted for metering advice if any other alternative metering configurations need to be considered prior to carrying out any metering work. For Meter Maintenance purposes, non-standard or other alternate configurations or metering types may be used where site specific issues (e.g. insufficient space) will not allow for a metering configuration identified in Table 2, to be installed. Note: Meter Maintenance may only be conducted by Ausgrid s metering provider. Level 2 ASPs or electrical contractors must not conduct any Meter Maintenance Protection of metering All new and upgraded whole current metering installations must be protected by a 100A HRC fuse on each phase. The HRC fuse must be located at the metering point. For exceptions to the location requirement, contact your local Field Operations office for approval. ES3 Part A - Metering Installations 10 July 2015

15 2.3.5 Number of meters per installation The minimum number of meters will be supplied to ASPs to meter the connected or proposed tariffs of small retail customer sites in accordance with the requirements of this document and Ausgrid publication ES7 Application of Network Use of System Charges. The arrangements for issuing meters to ASPs are detailed in Ausgrid publication ES 4 Service Provider Authorisation. Additional meters, in excess of the minimum required for the installation (e.g. for future 3-phase loads), will only be provided if the future load requiring the additional meters, is clearly indicated on the Connection Application form stating what three phase equipment is to be installed. If E3 or B3 meters are installed, all operational line and load phases must be connected and energised to the meter at time of energisation Customers with controlled loads The E2 meter or LCU can only be issued for, and installed at a Customers Installation that are entitled to receive a controlled load tariff. Only one load-controlled tariff is permitted at a Customers Installation and must have an associated principal tariff (refer to ES7 Application of Network Use of System Charges). Only one E2 or LCU can be installed at such customer installations. The method of controlling loads at an installation will depend on the individual metering arrangements required for that installation and the type of load to be controlled. The meter or LCU will be supplied upon application by the ASP who has current Ausgrid Level 2 Category 4 Metering Authorisation. ASP s should consult with Ausgrid s local Field Operations office to clarify specific metering arrangements, the availability of certain electronic instrument types and to ensure the correct programming of the LCU. As the E2 meter or LCU must be pre-programmed in advance for particular site locations, the local Field Operations office will require the details of the ripple control switching frequency (e.g. 492, 750 or 1050 Hz) and channel (e.g ) or whether time switch control is required. These details are to be provided by the ASP on the Meter Requisition' form (available from the local Field Operations office) when requesting a controlled load meter or LCU. Ausgrid s controlled load equipment (meters, LCUs etc) is rated for a maximum of 25 Amps resistive load at single phase. For any two or three phase controlled load connections, loads of greater than 25 Amps or reactive loads, the customer will be required to install a sealable contactor at their cost. (See the Service and Installation Rules of NSW for additional information). Where controlled load metering is installed for controlled load purposes, the ASP must indicate on the NOSW which meter is connected to the controlled load circuit and what relay channel and frequency or time switch setting is programmed into the meter or LCU. Note: The frequency or time settings must be obtained prior to connecting new metering and load control equipment. One way to do this is to check the existing or neighbouring installations (with their permission) Customers that remove controlled load Customers that no longer require controlled load (e.g. removal of a hot water system) must arrange for the removal of the redundant controlled load metering and LCU. They must also ensure the minimum number of meters remain at the installation. This may involve installing replacement metering. For example: Existing three-phase installations that contain ToU metering equipment where the load control equipment is no longer required, must replace the existing metering and load control equipment with an E3 meter (e.g. an existing installation may have 2, E1 s and an E2. If they no longer require the controlled load equipment, all the existing metering is to be removed and replaced with an E3 meter). In existing single phase installations which contain ToU metering equipment and where the load control is no longer required, either: a) E2 meter must be replaced with an E1 meter, or b) Controlled load E1/B1 and LCU must be removed and the E1/B1 (domestic load) remains connected. ES3 Part A - Metering Installations 11 July 2015

16 E2 meter for controlled load use When an E2 meter is provided as the control mechanism for the controlled load circuits of a customer s installation, the following precautions must be taken. Both elements of an E2 meter must be utilised (i.e. primary and controlled load elements). Incorrect installation of these meters will result in a major defect being issued against the ASP, which will require immediate rectification. An example of an E2 wiring diagram is provided in clause Controlled load circuits must not be connected through the main principal tariff element of the E2 meter. The unswitched terminal of the E2 meter can only be used for the following purposes: Existing dual element hot water systems utilising the unswitched terminal for the top element and the bottom element is supplied from the switched terminal: or For inductive loads, which must be connected via a customer supplied contactor as per the per the Service and Installation Rules of NSW; or For loads greater than 25 Amps or multi-phase loads which must be connected via a customer supplied contactor as per the Service and Installation Rules of NSW With the exception of a Structure 26 gross meter, the uncontrolled terminal on an E2 meter can only be utilised where a controlled load tariff is applicable. Note, both controlled and uncontrolled terminal are connected to the same metering element. The total combined current limit of an E2 meter must not exceed 100 amps. If the intended load is greater than 100 amps, the local Field Operations Office must be consulted for approval of alternative metering arrangements. Ausgrid may utilise the E2 meter to replace faulty relays, time switches and associated meters on existing Customer Installations. As the replacement of faulty Ausgrid supplied metering equipment is a monopoly service, ASPs are not permitted to carry out Metering Maintenance Load control unit (LCU) A LCU will be provided for standard and non-standard configurations as described in Table 2. They can be either a ripple operated relay or a time switch. LCU s must be wired according to the instructions on the relay and the standard wiring diagram in clause Only one LCU is permitted per separately metered Customer Installation. Controlled load circuits that have multi-phase loads, inductive loads or loads greater than 25 Amps must be connected via a customer supplied contactor as per the Service and Installation Rules of NSW. Where existing LCUs are installed and the metering is required to be upgraded to meet the requirements outlined in this document, all existing LCUs must be replaced with new LCUs Mix of ToU and Flat Rate meters New or upgraded metering installations must NOT have a mix of ToU and Flat Rate (including electro-mechanical) meters. Upgrading of existing installations with additional metering equipment is permitted, so long as the requirements of Table 2 are met. Example: An existing Flat Rate installation with 1-phase principal tariff only, requires the installation of metering for a controlled load tariff, if the existing principle tariff meter is rated at 100A, the ASP should leave this meter onsite and only add a B1 and LCU. Prior to the installation of any new metering equipment where existing electronic meters are installed, the ASP should contact Ausgrid s Field Operations local office to determine if these existing meters are ToU compatible. If they are ToU compatible they must only be replaced with an appropriate ToU metering configuration as per table 2. ES3 Part A - Metering Installations 12 July 2015

17 2.3.9 Transferring meters from a builders service to the permanent installation Existing whole current 100A rated metering instruments installed for a single domestic builders service may be transferred to the permanent metering location for the same site. The builder s service and the permanent metering location must be on the same land title and same type of installation. Note: This provision does not apply to builder s services supplying a commercial, industrial or multi-domestic development. This is provided that the meter(s) are not overloaded or obsolete and the procedures outlined in ES 1 Premises Connection Requirements and ES 4 - Service Provider Authorisation are adhered to. This includes the forwarding of separate NOSW forms for the removal and subsequent installation of the metering equipment. Note: The two installations are considered as separate in terms of their Connection Application and Ausgrid job number Relocating existing meters Existing whole current meters (or 'meter panels' with metering instruments in situ) must not be relocated to a new location (either on the same or a different meter panel) with the following exceptions: transferred in accordance with clause of this document; or existing Flat Rate (including electromechanical) or ToU bottom connected whole current meters rated at 100 Amps (as indicated on the meter nameplate) may be relocated provided the new location is within the same Customer Installation Flexible switchboard and panel wiring Flexible switchboard and panel wiring such as Triangle s PVC Flexible V90 HT Panel Wires and Switchboard Cable may be used to connect service and metering equipment, provided it is installed in accordance with the manufacturer s specifications. In particular, the exposed bare stranded conductors must be terminated into an approved (by the flexible cable manufacturer) encapsulation device, such as a Bootlace Pin (BLP) that must be crimped with an approved (by the encapsulation device manufacturer) crimping tool, before the cable is connected to service and metering equipment. The (thin-walled) metallic portion of the encapsulation device (BLP) must be of adequate length to ensure effective connection under ALL termination screws of the service and metering equipment Standard wiring configurations for meters Below are the standard generic wiring configurations for E1, B1, E2, E3 and B3 meters. These can be used as a general guide but the specific wiring configurations can be found in ES3, Part B, Technical Specifications for Metering Equipment or the inside of the terminal scoop cover of each electronic meter. Specific metering details, including reading register displays, mounting dimensions, drilling templates and commissioning checks, can be found in ES3, Part B, Technical Specifications for Metering Equipment. Note 1: All metering devices contain a wiring diagram on the inside of the terminal scoop cover, and they must be wired to this arrangement. Note 2: In the following drawings, the following acronyms are used. OP Sw is the switched terminal of the off second element of the electronic meter. OP Cont is the continuous terminal of the second element of the electronic meter. ES3 Part A - Metering Installations 13 July 2015

18 E1 Single phase single element electronic meter E1 kwh Meter Import (Str 19) Or Import/Export (Str 21) Line N N Load Service Fuse A To Primary Load Main Switch N Service Neutral To Consumer s Neutral Link B1 Single phase element meter B1 kwh Meter Import (Str 01) Line N N Load Service Fuse A To Primary Load Main Switch N Service Neutral To Consumer s Neutral Link ES3 Part A - Metering Installations 14 July 2015

19 E2 single phase dual element electronic meter with controlled load E2 kwh Meter Import (Str 20) Or Import/Export (Str 23) Line N N Load OP Sw. OP Cont. To Controlled Load Main Switch (Big Blue Only) Service Fuse To Controlled Load Main Switch A To Primary Load Main Switch N Service Neutral To Consumer s Neutral Link E3 three phase single element electronic meter E3 kwh Meter Import (Str 19) Or Import/Export (Str 21) A Line A Load B Line B Load C Line C Load N Service Fuse To Primary Load Main Switch A To Primary Load Main Switch B To Primary Load Main Switch C N Service Neutral To Consumers Neutral Link ES3 Part A - Metering Installations 15 July 2015

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