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  • Document Number: ECP 11-0514

    Version: 2.0

    Date: 23/05/2016

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    ENGINEERING COMMISSIONING PROCEDURE

    ECP 11-0514

    ACB COMMISSIONING PROCEDURE

    Network(s): EPN, LPN, SPN

    Summary: This document details the testing and commissioning procedures for air circuit-breakers and the associated reverse power relay where applicable.

    Author: Stephen Tucker Date: 23/05/2016

    Approved By: Paul Williams Approved Date: 07/06/2016

    This document forms part of the Companys Integrated Business System and its requirements are mandatory throughout UK Power Networks. Departure from these requirements may only be taken with the written approval of the Director of Asset Management. If you have any queries about this document please contact the author or owner of the current issue.

    Circulation

    UK Power Networks External

    All UK Power Networks G81 Website

    Asset Management Contractors

    Capital Programme ICPs/IDNOs

    Connections Meter Operators

    HSS&TT

    Network Operations

    UK Power Networks Services

    Other

  • ACB Commissioning Procedure Document Number: ECP 11-0514

    Version: 2.0

    Date: 23/05/2016

    UK Power Networks 2016 All rights reserved 2 of 16

    Revision Record

    Version 2.0 Review Date 07/06/2021

    Date 23/05/2016 Author Stephen Tucker

    Why has the document been updated: Periodic review.

    What has changed:

    Neutral-earth bonding requirements clarified (Section 16).

    Asset data requirements updated (Section 20).

    Shunt trip coil terminal designations added (ECP 11-0514a).

    Schematic diagrams added (ECP 11-0514a).

    Version 1.0 Review Date 23/06/2016

    Date 23/06/2014 Author Stephen Tucker

    New procedure for the commissioning of ACBs and reverse power relays based on legacy documents and good practice.

    This document formalises the procedure for testing and commissioning existing and new ACBs to ensure a consistent approach to commissioning

  • ACB Commissioning Procedure Document Number: ECP 11-0514

    Version: 2.0

    Date: 23/05/2016

    UK Power Networks 2016 All rights reserved 3 of 16

    Contents

    1 Introduction ............................................................................................................. 4

    2 Scope ....................................................................................................................... 4

    3 References ............................................................................................................... 5

    4 Abbreviations and Definitions ................................................................................ 5

    5 Equipment ................................................................................................................ 5

    6 Inspection ................................................................................................................ 6

    7 Protection Settings .................................................................................................. 6

    8 Functional Checks ................................................................................................... 6

    9 Continuity Test ........................................................................................................ 7

    10 High Voltage Insulation Test .................................................................................. 7

    11 Secondary Injection Tests (using Full-function Test Kit) ..................................... 8

    12 Trip Tests (if secondary injection is not possible) .............................................. 13

    13 Reverse Power Relay (if fitted) ............................................................................. 14

    14 Emergency Trip (if fitted) ...................................................................................... 14

    15 SCADA Checks (if applicable) .............................................................................. 15

    16 Metering Equipment (if fitted) ............................................................................... 15

    17 Final Checks .......................................................................................................... 15

    18 Test Equipment ..................................................................................................... 15

    19 Certification ........................................................................................................... 15

    20 Asset Data and Information .................................................................................. 15

    20.1 UK Power Networks ................................................................................................ 15

    20.2 Independent Connection Provider (ICP) .................................................................. 15

    21 Dependent Documents.......................................................................................... 16

  • ACB Commissioning Procedure Document Number: ECP 11-0514

    Version: 2.0

    Date: 23/05/2016

    UK Power Networks 2016 All rights reserved 4 of 16

    1 Introduction

    1.1 This document details the testing and commissioning procedures for air circuit-breakers (ACB), and the associated reverse power relay (RPR) where applicable, that shall be satisfied before the ACB can be accepted as fit for service and energisation.

    1.2 This procedure shall be carried out by the Commissioning Engineer or his appointed representative, who shall be an Authorised Person having appropriate training and/or experience.

    1.3 This procedure shall be carried out in accordance with the requirements of the Distribution Safety Rules.

    1.4 This procedure shall be carried out having regard to the requirements and recommendations of the manufacturer. If conflict exists between the requirements of the manufacturer and those of UK Power Networks the matter shall be referred to Asset Management (or your UK Power Networks nominated contact).

    1.5 This procedure assumes:

    The ACB is disconnected from the HV and LV networks.

    The ACB is disconnected from the RTU (if fitted).

    1.6 The results of all observations, tests, adjustments and all relevant remarks shall be recorded on the appropriate test form.

    1.7 Where possible testing shall be carried without disconnecting or disturbing any wiring.

    2 Scope

    2.1 This procedure applies to all LV ACBs with overload and reverse power relay protection as detailed below:

    Schneider Electric Masterpact NS1250, NT16H2, NW16H1 and NW20H1.

    2.2 The associated test forms, which should be read in conjunction with this procedure, include specific schematic diagrams, connections and trip levels for the ACBs listed above.

    2.3 This procedure is intended for use by UK Power Networks field staff, contractors and external connection providers.

  • ACB Commissioning Procedure Document Number: ECP 11-0514

    Version: 2.0

    Date: 23/05/2016

    UK Power Networks 2016 All rights reserved 5 of 16

    3 References

    3.1 This procedure should be read in conjunction with the following references:

    Schneider Masterpact User Manuals.

    Schneider STR Trip Units User Manual.

    Schneider Micrologic Trip Units User Manual.

    Instruction Bulletin for Hand-held Test Kit for Micrologic and STR Trip Units (48049-184-01).

    Instruction Bulletin for Full-function Test Kit for Micrologic and STR Trip Units (48049-183-02).

    3.2 This procedure should be used with the following test forms:

    ECP 11-0514a Schneider Masterpact ACB commissioning test form.

    ECP 11-0516 LV Metering Equipment Commissioning Procedure.

    4 Abbreviations and Definitions

    4.1 The following abbreviations are used throughout this procedure.

    Term Definition

    ACB Air Circuit-breaker

    ART UK Power Networks Asset Registration Team

    CT Current Transformer

    RPR Reverse Power Relay

    RTU Remote Terminal Unit

    5 Equipment

    5.1 The following equipment is required to carry out the tests detailed in this procedure:

    1kV insulation resistance tester (e.g. Megger).

    Multi-meter.

    0 to 240V AC variable supply test set.

    30V DC voltage supply set.

    Micrologic/STR hand-held test kit.

    Micrologic/STR test suitcase.

    7-pin test cable (Micrologic trip units).

    2-pin test cable (STR trip units).

    Reverse power relay test set B.

  • ACB Commissioning Procedure Document Number: ECP 11-0514

    Version: 2.0

    Date: 23/05/2016

    UK Power Networks 2016 All rights reserved 6 of 16

    6 Inspection

    6.1 Record the substation name, substation number, ACB model type, ACB serial number, Micrologic model type, protection settings and RPR details on the test form.

    6.2 Carry out a visual inspection of the ACB as detailed below. If possible the Commissioning Engineer shall rectify any non-conformances. However, all equipment defects shall be referred to Asset Management.

    Check that the ACB is undamaged, correctly mounted and secured.

    Check the three-phase clearance at both the transformer and cable box terminals.

    Check that there are no remains from the shear off b