Induce Trafo

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POWER TRANSFORMER INDUCE TESTDOCUMENT

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TABLE OF CONTENTS No.DescriptionsPage

TABLE OF CONTENS 1

1TITLE 2

2SCOPE 2

3OBJECTIVE 2

4REFERENCE 2

5RISK AND SAFETY PRECAUTION2

6TEST ITEMS3

7TEST PROCEDURE3

8TEST FORM7-8


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1. TITLE TRANSFORMER WITHSTAND TEST

2. SCOPE

TRANSFORMER INDUCE TEST3. OBJECTIVE

This is to assure that the requirements of electrical individual test works are meets the codes requirements and contract specifications. To make sure, the works are carried out in acceptable workmanship and follow the requirements in the quality manual.

4. REFERENCE4.1 Reference Manual

4.2 Applicable Manufacturers Manuals/Standards

4.3 Contract Specifications and Construction Drawing

4.4 Standard for hand-over test of electric equipment electric equipment installation engineering ( GB Standard 50150-2006 ). 4.5 Transformer JEAC-5001-845. RISK AND SAFETY PRECAUTION

5.1 Everyone must wear safety helmet when come into construction site and tie safety belt when work at height.

5.2 High voltage testing area should be circled by rail with warning board and make special person to watch.POWER TRANSFORMER INDUCE TEST DOCUMENT

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5.3 If happen anything abnormal, the testing must be stopped, and strengthen test warding.

5.4 Clean all tools and instruments, prevent something to leave on instrument after test; if some wires are changed, it need be restored after test.

6. TRANSFORMER TEST ITEM 6.1 Visual Inspection 6.2 Insulation resistance test6.3 Transformer Induce Test6.4 Secondary winding Withstand test6.5 Primary neutral point withstand test7. TRANSFORMER TEST PROCEDURE

7.1 Visual Inspection

7.1.1 Check the nameplate of Transformer is identical or not 7.1.2 Check oil level, has been filled to transformer and conservator of

main tank and OLTC 7.1.3 Check grounding connection good or not7.1.4Transformer must be freely from external connection, primary and secondary connection.7.2.4 Insulation resistance - Use 5000V insulation resistance tester, record the environment temperature and moisture while measuring, the value should be not less than 1M/kilo Volt in normal temperature condition. POWER TRANSFORMER INDUCE TESTDOCUMENT

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- PI value of the machine = 10 minute / 1 minute value.

( PI value shall not less than 1.2 and the unballance result value

of each phase must not more than twist / 2x ).

Insulation resistance must be measured before and after applied voltage test.

7.3 Power Frequency Induce Test7.3.1` Precaution Transformer oil in good condition.

Insulation resistance of the all winding must have value 1M/kiloVolt or more and have IP 1.2 or more.

During testing, excitation current must be constant.

OLTC on highest voltage tap position

7.3.2

Induce test Voltage ( Specification )

Test Voltage

0,64 x Highest Voltage Tap

Test Frequency

50 Hz

Test Duration

15 minute

7.3.3 Application / Test circuit



8

Test Form.

TRANSFORMER AC VOLTAGE WITHSTAND TESTPower Plan/Substation: Tanjung Priok ( Pelindo )

Equipment

: Power Transformer

Number of Unit

: ....

Manufacture

: UnindoModel / Type

: Power Rating

: 60 MVA

Operating Voltage

: 150 kV / 20kV

Nominal current

: Amp

Cooling system

: ONAFSerial Number

:

Year

: 20

HV Wind Ins Level :

kV

HV neutral Ins Level :

kVInduce test Test PointTEST VOLTAGE ( kV )

Time DurantionTEST RESULT

R phase10715 minute

S phase

T phase


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INSULATION RESISTANCE (BEFORE APPLIED VOLTAGE TEST)

Meausere PointINSULATION RESISTANCE ( M )Absorbtion

R1/R15PI

R10/R1REMARK

15 Second60 second10 minute

HV LV

HV - TV

HV - Ground

LV - Ground

TV - Ground

LV - TV

Remark :

INSULATION RESISTANCE (AFTER APPLIED VOLTAGE TEST)Meausere PointINSULATION RESISTANCE ( M )Absorbtion

R1/R15PI

R10/R1REMARK

15 Second60 second10 minute

HV LV

HV - TV

HV - Ground

LV - Ground

TV - Ground

LV - TV

Remark :Tested byWitneesed bySupervised by

Signature

Name

Date

Time duration

15

minute

Test Voltage

kV

EMBED Visio.Drawing.11

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_1172154935.vsdkVmeter

Trafo Regulator0 - 240 V/ 2 X 30 kVA

Power input

Trafo Step up400 V / 20 kV

Amp

Vin

Test set

LV

HV

a

b

c

A

B

C

N

TRANSFORMER UNDER TEST

V Test

V Test = 0,64 Vp-p Tap 1

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Induce Trafo