‘Electrical Systems’

Time to Focus

8/21/2018 1

Introduction

8/21/2018 2

• Introduction

• Electricity

• Electrical Safety

• Electrical Stats - Mick McKenzie

• Electrical Related Events

• Electrical Systems Overview

• Electrical Management and Controls – Kevin Barton NGB

Testing Manager

• Temporary Electrics – Chris Sweet

• Electrical Compliance – Nick Martin

Electricity

“Electricity is invisible and a constant danger, it is never to be

underestimated or ignored”

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Electrical Safety

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The danger of working with and around electricity is well

Publicized.

It has the potential to kill or cause severe injury.

Hazards include:

Electric Shock and burns from contact with live parts

Exposure to arching or fire from electrical install

Other types of injury related to the above occurrences

such as falling from height.

So vigilance and robust control processes for working with

and around electricity is critical and required at all times.

These controls are particularly important on large multi

phased projects such as LBSR were construction teams are

working in and around live electrical assets with varying sizes

of plant and tools frequently.

Electrical Stats – Mick McKenzie Time to talks

1st Nov 2015 to 31st Dec 2016 = 43 (14 Months) 3 per month

1st Jan 2017 to 31th Oct 2017 = 57 (10 Months) 5.7 per month

1st Nov 2017 – 3rd Aug 2018 = 55 (9 Months) 6.1 per month

Since the Time to focus session on electricity last November we have

seen an increase in the number of time to talks carried out around

electricity

Close calls

Total close calls raised 2012 to 2017 = 1967 (59 Months) = 33 per

month

1st Nov 2017 – 3rd Aug = 745 (9 Months) = 83

Since the time to focus session we have again seen a significant rise in

the number raised

N420 Sponsor Review

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Electrical Related - Events

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Date

Time

Description

Contractor

11/11/2017 17:50

LV cable was damaged by the action of the bucket of a 3t 360 excavator. A flash resulted.

There were no injuries and there was no one in the immediate vicinity at risk of injury.

The activity was in the area immediately adjacent the Shipwright Arms and involved the

installation of drainage as part of the Tooley Street urban realm works.

The drainage had been installed and the excavation was being backfilled with local and

imported material. It is reported that it was during the movement of the spoil that the bucket

came into contact with a previously identified and exposed cable. The machine was not

digging but dragging back the material - CCTV footage made available by the Shipwright

Arms substantiates this.

The immediate cause of the incident is the contact of excavator bucket with the cable

causing a short circuit. The underlying causes include the failure to follow process and

supervisory deficits.

BCL / Costain

13/11/2017 08:00

Damage to Cable No 97 above ER-E20 feeding MCC-EO-23 block A mezz

Kilnbridge fire sealer was filling the hole above ER-E20 on the mezz on the North side with

compound when all of a sudden the compound was blown everywhere.

With better lighting we found a small nic on cable No 97 which is feeding MCC-EO-23 on

block A mezz, we confirmed this was the cable by hand tracing it back to SWBD D1-1 in ER-

E20. Contacted the permit office so they could inform the station that we need to isolate the

MCC.

Isolated Cable No 97 MCC-EO-23 and fitted safety locks and issued a permit to work No

06473. Then insulation resistance tested the cable and it was clear.

Once the cable was removed the damage was clear and the only way to restore power was

to cut the cable and insert a torpedo with a new temporary section of cable.

We installed the torpedo and new section of cable, retested it and re-energised it at 1330.

NGB

Electrical Related - Events

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Date

Time

Description

Contractor

21/01/2018 09:00 Live Conduit cut in SU 54 BOH Interim C – Façade Lighting conduit cut

Costain / NGB

10/03/2018 14:30

Details of event: An incident occurred on Saturday 10th March with a BROKK damaging

what is now known to be a redundant station communication cable during the task of

exposing existing drainage between 2 no. Drainage pits {7 & 8} in the Western Passage. no

injury

BCL / Costain

14/03/2018 10:45

This investigation relates to the discovery of a failure to adequately secure access to a

permit controlled LV room and the modification of the limitation of access permit issued for

the planned works being carried out in this room.

During a routine inspection on the BOH area by Gary Smith NR interface manager the door

to room ER-E05 was found open and paperwork for the planned work activity was found on

the floor.

Subsequent investigation identified that the limitation of access permit for the room had been

modified to include the name of the engineer who had arranged for it and also that

scaffolding was being carried out as part of the works.

Works were suspended and the room was shut.

The principal causes of the failures are the modification of a limitation of access permit after

it was issued by the permit issuer. And the permit controlled room being left open and

accessible to anyone who wanted to gain unauthorised access to the room.

Costain

30/04/2018 N/S Fire Panel struck by MEWP caused Network Fault Costain

Electrical Systems

HV -20kv/11kv - Overview of Systems

LV Distribution Normal (20kv) - overview of systems and any

outstanding works

LV Distribution Essential (11kv)

Retail LV Distribution - all sub mains installed and tested - status of any

outstanding issues

UPS - New and Legacy - battery replacements

Lighting and Small Power - status of where we are still working - Stainer

street / Joiner street / WAV / Western passage / Kent link areas that we

have yet to EIS

Dali Lighting Control - overview of system and planned completion

Disabled Alarm System - overview of system and planned completion

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HV -20kv/11kv - Overview of System

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8/21/2018 10

HV -20kv/11kv - Overview of System

Following the successful HV Interconnector Testing & Commissioning

of the Black Building Test, all HV works are now complete. The

station is fully operational as per the design intent.

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LV Distribution Normal (20kv) & Essential (11kv)

LV Distribution Normal (20kv) & Essential (11kv)

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All Main Switchboards and Distribution Boards are now fully tested

and commissioned (excluding a number of work areas identified in the

P6 programme).

Full LV discrimination has been verified with minor modification to

MCC breaker settings.

Retail LV Distribution

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Retail Switchboards Tested and Commissioned.

Final distribution to third parties (Retailer, ATM, JCD, Photo Me Booth

etc.) still to be completed or Stainer Street, Joiner Street, Terminating

Concourse.

Reviewing current design to separate Retail and Station Power

Supplies

UPS – New & Legacy Battery Replacement

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New

As discussed and agreed with the project and the RAM following UPS

systems will have replacement batteries due to failure to provide 1

hour autonomy as per specification.

UPS1/1-E-EL & UPS1/2-E-EL (Platform 1-15 Emergency Lighting)

UPS4E-CO (Telecom East)

UPS1 Arch 77 (Emergency Lighting Service Yard & Car Park)

Legacy

As discussed and agreed with the project and the RAM following UPS

systems are being retained by the route.

UPS5E-CO, UPS6E-CO & Shard UPS ( TER1, TER2 & Shard

Concourse Terminating)

Lighting and Small Power

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Works are still progressing in the following areas, as identified in the

P6 programme and have yet to be EIS;

Joiner Street Bridge Plant rooms

Western Passage

WAV Area

Terminus Concourse – Riser B

Kent Link

Joiner Street

Stainer Street

London Dungeon

SU77 Mezz

Area 51

Dali Lighting Control

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There are 29 Dali Control Panels in various stages of completion.

Witness Testing of the 1st Dali Panel planned for 23rd August with

Costain/NR for LCP26 Arch 77 & LCP28 Block C.

All the Testing & Commissioning of the remaining Dali Control Panels

are captured in the P6 programme.

Full System Testing & Commissioning currently planned for

completion 21Dec 18.

Disabled Alarm System

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Disabled Alarm System

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System 95% Installed.

Standalone testing and commissioning 95%,

Full integration testing to be completed, Date TBC period programme

update Friday 24th Aug.

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Electrical Safety Management System

Existing Station Supplies

New Station Supplies

Method of Manging Safe System of Works

New process to be implemented Sept 2018 onwards

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Electrical – Old DNO

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Electrical - New Switchboard

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Limitation of Access Permit

Electrical Management & Controls

Safe Isolation Permit

Temporary Electrics

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Temporary Electrics

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Woodlands Current Temporary Services August 18

MDU 2B -3L2 230V 16A combi

supplying power for portable transformer

MDU 2B - 6L2 - Gas room combi

MDU 2B - 7TP - 3 Phase gas room Combi

MDU 2B - 3L3 - 16A Combi vent room

office

MDU 2B

MDU 2A

MDU 12

MDU 21A

MDU 12 - 8TP - 2 TX block B/block C (5316)

Temp lighting in service trench

MDU 3C

MDU 28 - 2L1 - 2x 16A combi sockets

MDU 28 - 2L2 - 2x 16A combi sockets

(charging area for screens)

MDU 61- 2L1 - WIFI spur SU-33

MDU 61 - 2L2 - WIFI spur SU-36

MDU 27A - 3TP - LTX Stainer street (2930)

MDU 5 - 1TP - LTX no1 (4698)

MDU 30A - 2TP - TX 4167 Adj

MDU 30A

MDU 28

MDU 5

MDU 30

MDU 34

MDU SU- 19

MDU SU- 17

MDU 200A/ 7

MDU 32

MDU 33

MDU SU- 07

MDU SU- 17

MDU 32 - 6TP - Lighting & power TX Cooperidge (2086 &

4150)

MDU 27A

MDU 61

MDU61 - 4L2 - WIFI in airwave

MDU - 4L3 - MET radios airwave

32A SUPPLY FOR STANER

No permanent present

MDU 33 - 2L2 - DSSO Ped

Flow counter

MDU 32 - 2L2 - CCU DNO 11Kv No

permanent power in place NGB?

MDU 32 - 2L3 - CCU DNO 20Kv No

permanent power in place NGB?

630A MDU W52C MCCB1 200A MDU 32

Dungeon/middle MCCB 3 MDU 38A- RATRUN

MCCB 4 MDU 30A DUNGEON

MDU 21A -1TP Costains stores MDU 21A -5TP

New Costain Office

MDU 21A -7TP Toilet DB

MDU 21A -6TP Canteen DB

MDU 21A -2L3 Socket security

hut

MDU 33 - 8TP - TX Chicken shop

Lighting to be left in place until works are

complete

MDU WP3

Consumer unit fed from Distribution board in ER-W39 B.O.H supplying

lighting and power to nurses room and briefing area

MDU Electrical Equipment

MDU WP3 – 3L1 CIS screens Joiner

Street

MDU WP3 -3L1 2X spurs Joiner street

CCTV

All temporary lighting and power within this area is fed from MDU 3C. Awaiting test sheet and results from

Woodlands

Temporary Electrics

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Woodlands Current Temporary Services August 18

MDU 38A

MDU 40

MDU 42B

MDU WP4

MDU WP2

MDU WP1

MDU 61

MDU WP2 1TP- LTX adj No2 (5595)

8TP- LTX adj (4785)

MDU WP2 5TP- LTX adj No 1 (5594)

MDU WP4 4L1- CCTV Node

MDU

MDU WP4 4L3- DB lighting tunnel

MDU 42-B 3L2- LTX upstairs on top of

roof

MDU 42-B 1TP- LTX (3619) Red Brick

DB-B1-27ELP 8L1-Temp AC

supply fed from Excess

Fares DB DB-B1-27ELP 12TP-Temp AC supply fed from

Excess Fares DB

MDU 61 3TP- Combi

MDU 61 – 1TP TX Adj 3358

MDU 61- 8TP TX 3450

Temporary lighting and power still in place within

retail units and service spine in TTO

MDU WP2 – 2L1 JC Decaux signs x4

MDU WP2 3L3- EDNE sign Western

Passage

MDU WP4 7TP- Temp 3 phase DB in

SU64

MDU Electrical Equipment

Electrical Systems Compliance

When carrying out your compliance checks please ensure we check

110v Tools and leads are within their 3 month PAT test date

Limitation of access permit to works – ensure

Name/Date/Location/Details of work

From September onwards as mentioned above anyone working in any

Main LV Switchrooms must have VIR/SPR and endorsed by NR –

Richard Burgess.

Note HV Rooms will remain under NGB safe system of work, permit to

work.

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