Method Statement for Battery Charger.docx

KHABAT TPP UNITS 1&2

Doc. No Rev. No.

Method Statement for

Electrical and I&C Panels Installation

PROJECT NAME

: Khabat Thermal Power Plant Units 1&2

DOCUMENT NO.

: KP-00+++-CY712-B7209

TITLE

: Instrument Cabinet and Junction Box

OWNER

: Ministry of Electricity (MOE) of Kurdistan Regional Government

01.11.2015

Rev. No.

DATE

For Approval DESCRIPTION

A Sayfa 1 / 6

Page

Method of Statement for Battery

A

KP-00+++-CY712-B7204

TOTAL 5 PAGES (Including Cover)

Purpose ☐ For Information ☐ For Review ☒ For Approval ☐ For Construction ☐ As-Built

U.K.

C.A.

M.E.K.

M.Ö.

PREPARED

CHECKED

REVIEWED

APPROVED

GAMA POWER SYSTEMS ENG &CONTRACTING,INC.

Owner

Ministry of Electricity (MOE) of Kurdistan Regional Government Contractor

POSCO ENGINEERING & CONSTRUCTION CO., LTD. Main Subcontractor

GAMA POWER SYSTEMS ENGINEERING & CONTRACTING,INC.

KHABAT TPP UNITS 1&2

Doc. No Rev. No.

Method Statement for

Electrical and I&C Panels Installation

Page

KP-00+++-CY712-B7204 A Sayfa 2 / 6

SUMMARY

1.

PURPOSE OF TESTS............................................................................................................................................

2.

REFERENCE DOCUMENT.................................................................................................................................

3.

SCOPE.....................................................................................................................................................................

4.

TERMINOLOGY...................................................................................................................................................

5.

EQUIPMENT UNDER TEST...............................................................................................................................

6.

TEST EQUIPMENT REQUIRED........................................................................................................................

7.

PRELIMINARY CHECKS...................................................................................................................................

8.

ELECTRICAL CHECKS......................................................................................................................................

8.1.

TESTING CONTINUITY BETWEEN ALL METAL PARTS AND GROUND..............................................

8.2.

INSULATION RESISTANCE TESTS.................................................................................................................

8.3.

SYSTEM CHECK..................................................................................................................................................

8.4.

MECHANICAL CHECK......................................................................................................................................

8.5.

ELECTRICAL FUNCTION TESTS....................................................................................................................

8.5.1.

Check of Battery Charger Panel Before Energizing.......................................................................................

8.5.2.

Check of Automatic Transfer Switches............................................................................................................

9.

PLACING INTO SERVICE..................................................................................................................................

10.

RECORDING OF INSPECTION AND TEST DATA.........................................................................................

KHABAT TPP UNITS 1&2

Method Statement for

Electrical and I&C Panels Installation

Doc. No Rev. No. Page

KP-00+++-CY712-B7204 A Sayfa 3 / 6

1. PURPOSE OF TESTS Battery charger shall also provide DC power to battery system. Automatically provide continuity of electrical power, within the defined limits and without interruption. i.e. autonomy time in the event of network failure, shall be determined by the battery capacity The battery charger is generally used to energize the followings: SUPPLY TO BATTERY These tests are intended to check the board and its constituent parts for correct operation. This procedure provides a safe, standardized approach for the initial inspection, checkout, testing, and data documentation of Uninterruptible Power Supply (UPS) and Chargers for commissioning phase.

2. REFERENCE DOCUMENT Single line diagram n°: Schematic diagram / Equipment drawing n°:

3. SCOPE All working sites

4. TERMINOLOGY No applicable.

5. EQUIPMENT UNDER TEST Tyristors bridge battery charger Electronic static switches Control units Voltmeter and ampermeter

6. TEST EQUIPMENT REQUIRED Digital multimeter Milliohmmeter for continuity measurement Megohmmeter (500Vdc)

7. PRELIMINARY CHECKS -

Check the marking of battery charger board components.. Check that it is not possible to come into contact with energized equipment when working on the system.

KHABAT TPP UNITS 1&2

Method Statement for

Electrical and I&C Panels Installation

-

Doc. No Rev. No.

KP-00+++-CY712-B7204

Page

A Sayfa 4 / 6

Check the main busbar and auxiliary circuits (control, monitoring, alarm, fault) for continuity.

-

Check the grounding busbar continuity and connection to the main earthing system.

-

Check that the panel hinged doors are connected to the frame by earthing braids.

-

Check the door locks for correct operation. Open all the incomers and load circuit breakers.

-

Check the connections for conformity with the reference drawings and their tightness.

8. ELECTRICAL CHECKS 8.1.

TESTING CONTINUITY BETWEEN ALL METAL PARTS AND GROUND

For performing this test, it is generally recommended to use a milliohmmeter for continuity measurement.

8.2.

INSULATION RESISTANCE TESTS

It is recommended to perform these tests before connection starting so all isolating devices will be opened. If cables are already connected, open the isolating devices before any test. Disconnect the ground sensing device and the control cables. Using a 500 V DC megaohmmeter, measure the insulation resistance after a one minute electrification time between:  Positive busbar and negative busbar with ground.  Negative busbar and positive busbar with ground.  Auxiliary circuit and ground. Reconnect the cables after testing.

8.3.         

SYSTEM CHECK Check of manufacturer data Visual check Correct labelling of device and cable Satisfactory access to device Device and cable undamaged Correct cable terminations Correct sealing of cable entries in terminal boxes Correct protective and grounding connections Correct power supply

KHABAT TPP UNITS 1&2

Method Statement for

Electrical and I&C Panels Installation

8.4.   

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KP-00+++-CY712-B7204

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A Sayfa 5 / 6

MECHANICAL CHECK Grounding connections Cable connections Terminal blocks

8.5.

ELECTRICAL FUNCTION TESTS        

Open DC isolators between battery charger and battery /consumers Switch on main supply voltage Check voltage and phase sequence Switch on battery charger AC side Check DC voltage in all operating modes Check voltage and polarity on both sides of the DC isolator Close DC isolator Check of annunciation

8.5.1. Check of Battery Charger Panel Before Energizing Connect the battery charger and battery supply cables or incoming cables from Main Distribution board. Check the presence of the mechanical protectors preventing any accidental contact with live parts. Open all the outgoing disconnecting devices. Check the distribution board alarm information return up to the output terminal blocks.

8.5.2 Check of Automatic Transfer Switches Check mechanical and / or electrical interlocks. Check correct polarities. With the both available supplies confirm the functional checks by presence of voltage, loss of supply, restoration of supply in manual and in automatic mode.

9. PLACING INTO SERVICE Check that all necessary protective and signaling devices are in services. Voltage measurement,polarity check and voltmeter reading to be done for each busbar. Close all outgoing circuit-breaker when necessary after checking of the corresponding low voltage power cables and polarities. Open the circuit breakers Q1 (input), Q2 (battery output) and Q3 (coupler output), and switch off all automatic circuit breakers. Now switch on the 400 V AC input voltage to connect it to the plant.

KHABAT TPP UNITS 1&2

Method Statement for

Electrical and I&C Panels Installation

Doc. No Rev. No. Page

KP-00+++-CY712-B7204 A Sayfa 6 / 6

Measure the connected voltage with a voltmeter, and the rotating field, at Q1 ( Q1: L1 / Q1: L2 / Q1: L3). It is absolutely essential to make sure that the phase rotation sense is clockwise. Switch on circuit breakers Q1. Switch on circuit breakers Q2. After elapse of a brief initialization phase, the output voltage and the entire output current of the unit are shown alternatingly in the display.

10.

RECORDING OF INSPECTION AND TEST DATA

The results of the checks and measurements made during the field test shall be recorded on the following test form: