Pt-test-report.doc

Respon sibilities Legend CSD

SITE TEST REPORT Contractor’s name:

 Contracting Co. Ltd.

Date : Customer: SEC-EOA SEC – EOA Contract No. :

Name of Substation: 380/230/115/13.8KV AL-DAEREE

31131130/00

Potential Transformer Panel No:W626

Equip. No.:

Page 1 of 4 Dwg. Ref.:

Record No.:

POTENTIAL TRANSFORMER TEST

GENERAL DATA AND INFORMATIONS. Circuit Ref: Panel No: Make Type

Rated voltage Sr.No:-R Sr.No:-Y Sr.No:-B

DESCRIPTION Primary Volts Secondary Volts Class Burden VT Ratio Voltage factor (Vf)

WINDING -1

WINDING -2

DATE: TESTING ENGINEER

CSD- Engineer

Signature: ________________

Signature: ________________

Name

Name

: ________________

: ________________

SITE TEST REPORT

Date :

Contractor’s name:

 Contracting Co. Ltd.

Customer: SEC-EOA SEC – EOA Contract No. :

Name of Substation: 380/230/115/13.8KV AL-DAEREE

31131130/00

Potential Transformer Panel No:W626

1.

Equip. No.:

Page 2 of 4 Dwg. Ref.:

Record No.:

INSULATION RESISTANCE TEST: Instrument

:

Make Model No. / Sl. No.

: :

Applied Voltage

:

Criteria

:

Primary to Ground 5 KV DC for one minute. Primary to Secondary 2.5 KV DC for one minute. Secondary to Ground 1 KV DC for one minute. More than 1000 M Ohms for Primary – Secondary / Earth. More than 10 M Ohms for Secondary – Earth

Applied Between Phase A

IR Value in G- Ohms Phase B

Phase C

Primary - Earth Primary-Secondary-1 Primary – Secondary 2 Secondary1 – Earth Secondary 2 – Earth

DATE: TESTING ENGINEER

CSD- Engineer

Signature: ________________

Signature: ________________

Name

Name

: ________________

: ________________

Remarks

SITE TEST REPORT

Date :

Contractor’s name:

Customer: SEC-EOA

 Contracting Co. Ltd.

SEC – EOA Contract No. :

Name of Substation: 380/230/115/13.8KV AL-DAEREE

31131130/00

Potential Transformer Panel No:W626 2.

Equip. No.:

Page 3 of 4 Dwg. Ref.:

Record No.:

Winding Resistance (Secondary side) Instrument

:

Model No. / Sl. No.

:

Criteria

:

CPC 100 PB834V Within ± 5% of Factory Test Report Amb.Temp : 30 o C

Measured Value in Ohms at 75o C

Core Phase 1 A

2 1

B

2 1

C

2

Full Wdg Mid Tap Full Wdg Mid Tap Full Wdg Mid Tap Full Wdg Mid Tap Full Wdg Mid Tap Full Wdg Mid Tap

87 56.6 83.7 55.3 89.7 58.8 80.9 56.1 89.7 60.6 83.2 56.5

Factory Value Ohms at 75o C 90 58 85 56 91 60 85 57 92 61 85 58

% Variation

Remarks

3.3 2.4 1.5 1.2 1.4 2.0 4.8 1.6 2.5 0.7 2.1 2.6

Formula to convert winding resistance to reference temperature at 75  C for copper winding. NOTE: 1. Rc = Rm =

Calculated value at 75  C Measurement value which contained a measurement cable.

NOTE: 2 Calculated 75  C Rx = Ta =

Rc = (Rm-Rx) x (234.5+75) (234.5+Ta)

Resistance value of the measurement cable. Ambient Temperature  C

NOTE: 3 Resistance value of measurement cable Rx = _______ Ω

DATE: TESTING ENGINEER

CSD- Engineer

Signature: ________________

Signature: ________________

Name

Name

: ________________

: ________________

SITE TEST REPORT

Date :

Contractor’s name:

Customer: SEC-EOA

 Contracting Co. Ltd.

SEC – EOA Contract No. :

Name of Substation: 380/230/115/13.8KV AL-DAEREE

31131130/00

Potential Transformer Panel No:W626

Equip. No.:

Page 4 of 4 Dwg. Ref.:

Record No.:

3. Ratio Test INSTRUMENTS:

Make:

Model:

Voltage Applied to Primary:

Phase

Volt (Full Tap) &

Measured Secondary Voltage

Tap

Core-1

Volt (Mid Tap)

Measured Ratio

Core-2

Core-1

Sr.No:

Core-2

Theoretical Ratio Core-1

Core-2

% Error Core-1

Full Tap A Mid Tap Full Tap B Mid Tap Full Tap C Mid Tap 4. POLARITY TEST : Instrument

:  Tick here if found okay

Phase

Core

A

1

Polarity checked & found okay

2 B

1 2

C

1 2

DATE: TESTING ENGINEER

CSD- Engineer

Signature: ________________

Signature: ________________

Name

Name

: ________________

: ________________

Core-2