Site Service ReportKirby Engineering & Construction Visa Data Centre, Lime Tree Way, BASINGSTOKE Prepared for:Chris Bull

Produced By: Dan Cotton Project Manager: Terry NorwoodWork Order: WO-07414442 Project Number: 900143359Date of Report: 15-10-2019

Introduction/Scope of work:Carry out site survey for outstanding works for revisit to complete all works.

Site Work - Date: Start: End: 15-10-2019 15-10-2019

Assets:CustNaming

DeviceType

Brand Range Type SerialNumber

Manufacture Year

LV ACB LV circuitbreaker

SchneiderElectric

Masterpact NW25 H1 PP192032077

05/2019

TX-ES Transformer SchneiderElectric

DistributionTransformer

DMU 4231 103286924 05/2019

TX-ES LV FeederPillar

SchneiderElectric

? ACB FP 103298068-1-19

01/2019

Substation Construction: Indoor Substation

Environment: Clean and tidy environment. Equipment is live fed from the HV. The site is still under heavy construction.

General Condition of equipment: Good Condition.

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Summary of Work Completed: Modbus Comms Fault:

The customer has an outstanding issue with the communicationequipment for the LV ACB. The existing equipment will notcommunicate with the Modbus network despite being setup to thesettings provided by the customer. It is recommended that for our visit to site we carry the followingspare equipment to replace potentially faulty parts:1 off Modbus BCM-ULP Module part number: 331061 off Micrologic 5.0E Trip Unit part number: 476021 off CAT 5 Cable (as per the original spec / installed cable)1 off RJ45 2 way Plug (see image 10)Please note that these parts may not be required, but are there asa contingency if any of the parts have failed.

- It would be prudent to first check the wiring installation from theBCM-ULP Module terminal block through to the RJ45 connector. Ifthis has been installed incorrectly it may be a cause for the issuewith identifying the comms via the Modbus network. Image 4 and 5show the wiring setup on the ACB.- It will also be advisable to check the setup of the commsconfiguration via the front display of the Micrologic trip unit. Thiscould also be a cause for the comms failure. Image 6 - 8 show thesetup of the Micrologic via the front display.- If replacement of the BCM-ULP Module or Micrologic arerequired, a Performer test and Trip test will be required oncereinstallation of the equipment has taken place.- After replacement of any equipment or changes to wiring /settings has been performed, it is advisable that the comms aretested locally at the panel to ensure this eliminates any issuelocally.

Restricted Earth Fault Testing:

The relay installed originally was identified on originalcommissioning to be incorrectly specified and as a result did notallow for correct operation during testing.For the testing process, full isolation of the transformer will berequired from the HV incoming side. The customer will be providingan SAP to carry out the isolations and issue of safetydocumentation. It was agreed with the customer that work couldbegin from 08:00 AM on Friday 25th October.The customer requires us to carry out full commissioning of theprotection. The current transformers are installed locally at thetransformer within the LV joggle box from the Transformer, seeimage 11. These current transformers are 2500/1A CTs. It will be arequirement for testing that we have primary injection equipmentcapable of covering all setting specifications.The protection relay and stabilising resistor are also installed locallywithin the LV cabinet coupled to the transformer. The customer will need to provide finalised settings for the stab.Resistor and the MCAG 14 relay prior to testing commencing.

- Secondary injection tests are to be carried out on the protectionrelay to ensure correct pick ups and correct tripping times for the

device.- Primary injection tests will be carried out phase to phase andphase to neutral to ensure stabilisation of the protection relay.Secondary current readings can be observed at the rear of therelay.- Primary injection tests will be carried out single phase to ensuretripping of the protection relay. Secondary current readings can beobserved at the rear of the relay. Check for correct flag operationduring trip tests.- Correct operation of any output contacts to be tested at theterminals provided within the LV cabinet. A HV / LV intertrip can bechecked for correct operation during this testing process, howeverthis will be up to the customer to test.

Transformer SAT Testing:

The transformer is currently live and being fed from HV2 SwitchPanel. For any SAT testing, the HV feed will need to be firstisolated and earthed and then the terminations unbolting from thetransformer by the customer. Any relevant safety documentationwill need to be issued by the customer SAP. It was also agreedwith the customer that LV cables would not be disconnected and alltests performed to the top side of the ACB.As the transformer is currently live and has had extensive coldcommissioning tasks performed it is only recommended that a fewtests are performed.

- Perform Insulation Resistance tests. A 5kV IR test on the HV toLV & Earth, a 5kV IR test on the HV to LV and finally a 1kV IR teston the LV to HV & Earth. All tests will be performed for 1 minute.The Neutral-Earth link and any control fuses will need to beremoved / isolated prior to commencing this testing.- Perform a Contact Resistance test (Ductor) on the LV busbarconnections from the Transformer bushing connection to the top ofthe LV ACB. This will be performed at 10 Amps. This is to ensuregood contact of the joints after installation of the LV cabinet.- Check over temperature alarms and trips to the terminal boxlocated on the side of the transformer. It would be up to thecustomer to test beyond the transformer terminations.

The customer has also requested that we replace the damagedfront cover of the terminal box installed on the side of thetransformer. This can be seen in image 14. Up to date schematic drawings printed in A1 format will be requiredfor these works to ensure correct operation of any control circuits.One drawing will be required for Transformer control and one forLV cabinet control. The LV cabinet schemes had extensive workscarried out in August and these drawings will be required.

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Summary of work performed additional to original scopeType Description of work

performedComplete

N/A N/A N/A

Additional Parts used to be billedPart Number Quantity DescriptionN/A N/A N/A

Outstanding Actions/Recommendations: No further action required

Work complete? Yes

Is there evidence of unauthorised entry? No

Report Created by:Print Sign Date

Dan Cotton

15-10-2019

Reviewed by Project Manager:Print Sign Date

Pending Pending Pending