ECS COMBINED CUT-OUT AND CT CHAMBER INSTALLATION

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Document Number: ECS 13-0080 Network(s): Summary: ENGINEERING CONSTRUCTION STANDARD ECS 13-0080 COMBINED CUT-OUT AND CT CHAMBER INSTALLATION EPN, LPN, SPN This standard details the procedure for

1 Document Number: ECS Network(s): Summary: ENGINEERING CONSTRUCTION STANDARD ECS COMBINED CUT-OUT AND CT CHAMBER INSTALLATION EPN, LPN, SPN This standard details the procedure for installing the Schneider combined cut-out and CT chamber. Author: Jesse Garcia Approver: Paul Williams Date: 05/10/2017 This document forms part of the Company s 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. Applicable To UK Power Networks External Asset Management G81 Website Capital Programme UK Power Networks Services Connections Contractors Health & Safety ICPs/IDNOs Legal Meter Operators Network Operations Procurement Strategy & Regulation Technical Training THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE

2 Revision Record Version 2.0 Review Date 05/10/2022 Date 26/09/17 Author Jesse Garcia Reasons for Update: Periodic Review What has changed: Section 6.1; Added M6 washer in order to fix it onto plywood. Schneider drawing number updated in section 7.2 Version 1.0 Review Date 14/10/2017 Date 27/09/2016 Author Jesse Garcia New document to cover the installation of the combined cut-out and CT chamber UK Power Networks 2017 All rights reserved 2 of 14

3 Contents 1 Introduction Scope Glossary and Abbreviations Equipment Description Three Phase Cut-Out Parts List Cut-out and CT Chamber Installation Overview Mounting Cable Box (Item 2) Incoming Cable Covers Outgoing Cables Meter Terminal Box Replacing CTs and Terminations References UK Power Networks Standards Other Documents Figures Figure 4-1 Combined Cut-out and CT Chamber... 5 Figure 4-2 Secure Premier Meter... 6 Figure 4-3 Elster A1700 Meter... 6 Figure 4-4 Elster A1120/40 Meter... 6 Figure 4-5 EDMI MK10E Meter... 6 Tables Table 5-1 Parts List... 6 UK Power Networks 2017 All rights reserved 3 of 14

4 1 Introduction This standard details the procedures to be undertaken when installing the Schneider combined cut-out CT chamber. 2 Scope This standard applies to the installation of the Schneider combined cut-out and CT chamber in EPN, LPN and SPN. 3 Glossary and Abbreviations Term CT UK Power Networks Definition Current Transformer UK Power Networks (Operations) Ltd consists of three electricity distribution networks: Eastern Power Networks plc (EPN). London Power Network plc (LPN). South Eastern Power Networks plc (SPN). UK Power Networks 2017 All rights reserved 4 of 14

5 4 Equipment Description The Schneider combined cut-out and CT chamber is shown in Figure 4-1 consists of a 400A three-phase cut-out, a CT chamber containing three 400/5 CTs and a meter terminal box that can accept a range of meters shown in Figure 4-2 to Figure Three Phase Cut-Out Figure 4-1 Combined Cut-out and CT Chamber UK Power Networks 2017 All rights reserved 5 of 14

required to install the combined cut-out

Table 5-1 Parts List Part Materials Code

CT-chamber 47441N 1 M10 Fixings 13698R 3

6 Figure 4-2 Secure Premier Meter Figure 4-3 Elster A1700 Meter Figure 4-4 Elster A1120/40 Meter Figure 4-5 EDMI MK10E Meter 5 Parts List The parts list required to install the combined cut-out and CT chamber is shown below. Table 5-1 Parts List Part Materials Code Qty Comments Combined Schneider CT-chamber 47441N 1 M10 Fixings 13698R 3 M6 Washers 13247H 3 UK Power Networks 2017 All rights reserved 6 of 14

including cable terminals and meter box (weight 15kg).

7 6 Cut-out and CT Chamber Installation 6.1 Overview Refer to the LV Manual for jointing instructions. Equipment Assembly The combined cut-out and CT chamber is supplied as two parts: Item 1 Main cut-out body including cable terminals and meter box (weight 15kg). Item 2 Front cover, fuse handles, bottom terminal covers, 3 x blanking discs, incoming cable grommet and cable box. UK Power Networks 2017 All rights reserved 7 of 14

Following manual handling guidelines mount the main cut-out body to the wall using suitable fixings as appropriate for the site conditions (not supplied with kit).

8 Mounting Main Cut-out Body (Item 1) Fixing Item 1 on Wall Use the template provided to mark out the two main fixing holes for the cut-out body. Fixing Item 1 on Wall Remove the cable terminal covers as shown using a flat head screwdriver. Following manual handling guidelines mount the main cut-out body to the wall using suitable fixings as appropriate for the site conditions (not supplied with kit). Fixing Item 1 on Wall Drill wall and fix to the wall using M10 fixings when fixing to brick walls. Utilise an M6 washers and suitable wood screws when fixing to plywood the length of the screw will be dependent on thickness of the plywood on site. UK Power Networks 2017 All rights reserved 8 of 14

2 Mounting Cable Box (Item 2) Fixing Item 2 Once item 1 is secured to the wall, line up the cable box (item 2) and

9 Fixing Item 1 on Wall The copper earth component behind the nominated hole to the right hand side has been modified to allow an M10 fixing to pass through. 6.2 Mounting Cable Box (Item 2) Fixing Item 2 Once item 1 is secured to the wall, line up the cable box (item 2) and mark the three fixing holes. Drill holes. Mount the cable box on the wall using the three holes drilled previously using suitable fixings. UK Power Networks 2017 All rights reserved 9 of 14

10 6.3 Incoming Cable Cable Range 1x (70mm² 300mm²) solid aluminium sectorial conductors or 1x (70mm² 300mm²) stranded conductors. Cable Terminations 1 x termination per phase using Sicame UMT300 (shear head connector). Cable Installation Install the cables in accordance with the LV jointing manual. UK Power Networks 2017 All rights reserved 10 of 14

6.4 Covers Fitting Covers Replace the terminal covers using the two screws on

Replace the front cover and the cable box front cover as shown.

left. Cable Cover Securing In order to secure the front part of the cable

11 6.4 Covers Fitting Covers Replace the terminal covers using the two screws on either side of the cover. Replace the front cover and the cable box front cover as shown. Ensure the wire seals are present in the locations shown in the image on the left. Cable Cover Securing In order to secure the front part of the cable chamber, ensure that all the captive back clips are attached to the back of the cable chamber. UK Power Networks 2017 All rights reserved 11 of 14

6.5 Outgoing Cables Internal Cable Grommet With a hacksaw, cut the grommet to suit the correct

Note: Ensure the grommets protrude through the trunking if using trunking, to avoid IP rating

Or 1x (70mm² 300mm²) stranded conductors.

12 6.5 Outgoing Cables Internal Cable Grommet With a hacksaw, cut the grommet to suit the correct cable size in order to avoid ingress of foreign objects. Note: Ensure the grommets protrude through the trunking if using trunking, to avoid IP rating issues. Cable Range 1x (70mm² 300mm²) solid aluminium sectorial conductors. Or 1x (70mm² 300mm²) stranded conductors. Terminations 1 or 2 terminations per phase using Sicame UMT300 (shear head connector). 6.6 Meter Terminal Box Meter Terminal box Electrical diagram ref, with WAGO terminal (DJ207E001). UK Power Networks 2017 All rights reserved 12 of 14

6.7 Replacing CTs and Terminations Replacing CTs and Terminations In order to replace the CT or the termination the stalk needs to be undone.

M12 nut securing stalks depicted on the left picture; recommended tightening torque 40Nm. Replacing CTs and Terminations Once the stalk has been removed.

Note: The CT wiring S1; S2, and CT ration must be correct if the CTs are replaced.

13 6.7 Replacing CTs and Terminations Replacing CTs and Terminations In order to replace the CT or the termination the stalk needs to be undone. Before the stalk is removed the plastic white pin holding the CT depicted on the picture needs to be removed so that the stalk can be pulled away. M12 nut securing stalks depicted on the left picture; recommended tightening torque 40Nm. Replacing CTs and Terminations Once the stalk has been removed. The termination can be pulled upwards through the CT. The CT is held onto the bus bar via a pin; it will require removing. Note: The CT wiring S1; S2, and CT ration must be correct if the CTs are replaced. The CT wiring must be kept away from the termination and protected by the polycarbonate barriers provided. Sicame Terminations The UMT95 has 2 x M6 fixings and the recommended tightening torque 20Nm. The UMT185 has 2 x M8 fixings and the recommended tightening torque 48Nm. The UMT300 has 2 x M8 fixings and the recommended tightening torque 48Nm. UK Power Networks 2017 All rights reserved 13 of 14

14 7 References 7.1 UK Power Networks Standards EAS LV Jointing Manual Combined Cut-Out and CT-Chamber 7.2 Other Documents Schneider Cut-Out Drawing EUKPNCTC-SF UK Power Networks 2017 All rights reserved 14 of 14

ECS INSTALLATION OF SERVICE WAYS AND CABLES (SCHNEIDER ELECTRIC)

ECS INSTALLATION OF SERVICE WAYS AND CABLES (SCHNEIDER ELECTRIC) THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE ENGINEERING CONSTRUCTION STANDARD ECS 02-0037 INSTALLATION OF SERVICE WAYS AND CABLES (SCHNEIDER ELECTRIC) Network(s):