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METHOD STATEMENT

This l.lethd Staternent has been rcviewed by the Qualiy,assunnceRepresentati\es and found to cornpry wtth the qualttl assuancerequiremenb.

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ELECTRICAL PRESSURF TFSTING FSD I263 Page ) of-l

I GENERAL DESCRIPTION

1.1 This method statement is for the Electrical Pressure Testing ofcables operatingon voltages up to and including 1lkV.

This statement is not intended to supercede or vary in any way instructionsthat may be issued by the client.

2 PREPARATIONS

2.1 Obtain f.om customer details ofall potential hazards and risks on the site.

2.2 Check that all hazards and risks are clearly identified within this methodstatement.

2.3 Before commencing any work ensure the personnel involved are instructed inthe safety measures and requirements ofthis Method Statement-

2-4 Ensure all personnel working on the plant wear Safety Boots, Safety Helmet,Boiler suits, Hivis vests and any other protective clothing necessary for thework to be completed.

2.5 Ensure all personnel are appropriately qualified for the tasks to be carried outto include awareness ofthe latest Safety Rules for working on High VoltageSystems and that at least one person prcsent will be authorised in the switchingof high voltage equipment.

2.6 Ensure all equipment and tools for use in the Tests are correct for the works,have been tested and are in accordance with current legislation.

2-7 Obtain all necessary permits to work and permits to test.

2.a Check that there are no other permits issued to others for work on theequipment to which the cables to be tested are connected_

2-9 Place warning notices and barriers.

2.10 Visually inspect and check the terminations ofthe cable to be tested.

SETTING OI]T

3-1 Prior to commencement oftesting the following actions are to be taken:

a)

b)

c)

d)

e)

D

c)

A walkound ofthe site with the customer to identify and ensure wherenecessary all points of supply are isolated and locked.

Ensure that the cable to be tested is dead and efficiently connected to earth.Ifeath to be disconnected ensurc permit is obtained

Advise all personnel working adjacent to the test area that H.V.Testing istaking place and cleal all non essential personnel.

Any cables connected to transformers to have the links removed

Current TEosformers to remain connected unless otherwise instructed.

Primary Fuses to be removed and Metering Voltage Transformers withdrawn.

Ensure the test equipment is complete with the correct prcbes for theswitchgear

4

4t

METHOD

Test cables with Megger before applying H.V.Test:

Low Voltage cables

High Voltage cables500v1000v

4.2

Minimum acceptable resistance not less than 10 megohm.

Carry out Procedure as per FSD 1252 before commeocing test

Tests to be carried out as per B.S.Standards as follows:

First Test:

Secord Test:

Third Test:

All cores to eanh

CoreltoCores2&3

Coresl&2toCore3

Discharge all conductors before and after each application ofany test voltage.

ELECTR]CAL PRESSURE TESTING FSD I263 Page4dT

4.3 Test voltages as per B.s. Jfk p"r tuut" u"to*,

Voltage Designation

600/10001900/33003300/33003800/66006600/66006350/l 10008700/l100012700t2200019000/33000

D.C.Voltage betweenconductors

3,50010,00010,00020,00020,00034,00034,000

D.C.Voltage betweeneach conductor and metalsheath

3,5007,00010,00015,00020,00025,00034,00050,00076,000

Note I

Note 2

These test voltges are intended for cables immediately after cornrnissioningand not for cables which have been in service. When testing is required aftetcables have been in service , manufacturer should be consulted for theappropriate test conditions which will depend on individual circumstances.

Where switchgear or any other equipment cannot readily isolated fromterminals the test voltage should be subject to agreement between the partiesconcerned.The duration ofthe test shall be 15 minutes increasing the voltage gradually,lhere must be no breakdown ofthe insulation.

4.4 On completion of test remove probes and reconnect any items of equipmentdisconnected for test.

4.5 Issue a Test Certificate Form FSD1087 for each cable tested.

4-6 Finally check all connections to equipment and earths are correct.

4.7 Cancel all permits.

4.8 Energise cable

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ELECTRIC,AI PRESSURE TESTING FSD r263 Page 5 of 7

RECOMMENDATIONS FOR AFTER INSTALLATION TESTING

l. New Cables B.S. 5467/IEC 502

The test voltage to be increased gradually to the fullvalue and maintained continuouslyfor fifteen minutes.

2. New Cables B.S. 6622

Voltage Grade ofCable

3.A16.6 6.45ltt a.'7115

Test Voltago D.C.kv

5.9 10.9 r 8.5

TEST VOLTAGE IS APPLIED BETWEEN EACH CONDUCTOR AND THE ARMOURAND/OR SCREEN(S) AFTER TERMINATION AND JOINTING BUT BEFORECONNECTION TO THE SYSTEM.

3 Repairedlnstallations

When the cable has been in service for a period of time it is recommended that anytesting be carried out at a reduced level as follows;

0-2 years old cables test at 75olo as new test voltage2-10 years old cables test at 5070 as new test voltageThe test voltage to be increased gradually to the tabled value and maintainedcontinuously for fifteen minutes

4 Test requirementsAfter application ofthe test voltage there must be no breakdown ofthe

Voltagc Crade ofCable

0.6/r.0 t.a/3 3.6/6 6/r 0 8 7/15 12120 l8/30

Test Voltage D.C.Conductor/Sheathkv

5.9 10.9 18.5 37.0 50.4 '75.6

Voltagc grade ofcable

0.6/1.0 1.8/3 3.616 6lt0 8.7 /t5 t2/20 I8/30

D.C-T.st 0-2 Y@BOldD.C.Tcst 2-10 Ye6otd

4.43.0

8.1

5.4513.8

9.2518.912.6

27.'1

18.5

37.8 56.731.8

insulation

RISK ASSESSMENT

Risk

Tripping

Ope[ Excavation orDraw Pit

Drowning

Sewage Spillage,4,esidue

Moving Plant

Gas (Methane)

Falling Objects

Electric Shock

REFERENCES

Drawings:

Work Standards:

Safety Standards:

Precaution

Remove tripping hazards and keep work areas

free Ilom debris.

Ensure warning signs are displayed. Ensureall open excavations are fenced and replace allcovers.

When working around or on water or sludgepersonnel to wear Iifejackets and safety belts.

All Personal Protective Equipment to be wom atall times. Adequate washing facilities to beprovided. lnoculations to be up to date.

All personnel to wear reflective vests.

Gas Monitors to be placed in all susceptibleareas

Personal Protective Equipment i.e Had Hat &Boots.

Competent persons to carry out work. Permit towork system.

Isolation of apparatus mandatory

TBA

l6th Edition IEE Regulations856739

FSDL Safe Working ProceduresCustomer Safe Working ProceduresUltimate Client Safe Working Procedures

RESPONSIBILITIES

Project Manager (Head Officc):Project Engineer (tlead Office):

Field Operatioos MaDager:

Safety Consultart:

Site Manager

DISTRIBI]TION

Mrs.F.LowerT.B.A.

Mr.B.D.Phillips

Mr.R.Green (Engineering Employers Federstion)

TBA

Health & Safety FileContract FileSite Safety File

ClientFSDLFSDL

FSD r263ELECTRICTL PRESSURE TESTI NG