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Job Card No DATE: - CAPACITY: - (1) Meggar

This document contains the test results from performing various diagnostic tests on a transformer. It includes [1] insulation resistance measurements, [2] turn ratio tests at different tap positions, [3] short circuit and [4] no load tests measuring voltages, currents, losses and temperatures at each tap, [5] vector group and phase displacement tests, [6] winding resistance measurements, [7] high voltage withstand tests, [8] induced overvoltage withstand tests, [9] magnetic balance tests, [10] sound level measurements, and [11] oil breakdown voltage tests. The test results are recorded on the job card to evaluate the transformer's condition and performance.

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tush9590
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53 views7 pages

Job Card No DATE: - CAPACITY: - (1) Meggar

This document contains the test results from performing various diagnostic tests on a transformer. It includes [1] insulation resistance measurements, [2] turn ratio tests at different tap positions, [3] short circuit and [4] no load tests measuring voltages, currents, losses and temperatures at each tap, [5] vector group and phase displacement tests, [6] winding resistance measurements, [7] high voltage withstand tests, [8] induced overvoltage withstand tests, [9] magnetic balance tests, [10] sound level measurements, and [11] oil breakdown voltage tests. The test results are recorded on the job card to evaluate the transformer's condition and performance.

Uploaded by

tush9590
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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JOB CARD No DATE:____________

CAPACITY: ____________

[1] MEGGAR
HV TO BODY: ______________ M Ohm
LV TO BODY : ______________ M Ohm
HV TO LV : ______________ M Ohm

[2] RATIO TEST : Primary voltage 11000 sec volt 433


Off circuit Tap Measured Ratio 44 Required Ratio
Position 1U Phase 1V Phase 1W Phase Minimum Standard Maximum
1 > -5% 45.97 46.20 46.43

2 > -2.5% 44.87 45.10 45.33

3 > -0% 43.78 44.00 44.22

4 > +2.5% 42.69 42.90 43.11

5 > +5% 41.59 41.80 42.01

[3] SHORT CKT TEST Load test BY POWER ANALYZER


TEMP:
TAP-1 Primary Voltage
Primary Ampere
Secondary Ampere
LOSSES

TAP-2 Primary Voltage


Primary Ampere
Secondary Ampere
LOSSES

TAP-3 Standard Primary Voltage


Primary Ampere
Secondary Ampere
LOSSES

TAP-4 Primary Voltage


Primary Ampere
Secondary Ampere
LOSSES

TAP-5 Primary Voltage


Primary Ampere
Secondary Ampere
LOSSES
[4] OPEN CKT TEST No Load Test BY POWER ANALYZER
BEFORE TANKING
TAP-3 Standard Voltage Secondary
Amp Secondary
LOSSES

AFTER TANKING
TAP-3 Standard Voltage Secondary
Amp Secondary
LOSSES

[5] VECTOR GROUP DY 11


1U 2U= SHORT
Applied volta 1U 1V=____1V 1W=___ 1W 1U=_____
1V 2V =1V2W=_________V
1W 2V >1W2W_________V HIGH VALUE

[6] RESISTANCE TEST


HV at terminals 1U 1V = ohm
1V 1W = ohm
1W 1U = ohm

2U 2V = _______ohm 2U-N = _______ohm


2V 2W = _______ohm 2V-N = _______ohm
2W 2U = _______ohm 2W-N = _______ohm

[7] High Voltage Test Separate source voltage withstand test


With Stand 28 KV For 1 Minutes on H Yes/ No ______
With Stand 3 KV For 1 Minutes on LV-433 V

(8)DVDF Test Induced over voltage test


With stood 866 V at 100 Hz for 1 min Yes/No _______

(9)Magnetic balance test

(10)Sound level test


Ambient sound
Sound while O.C.
Net Transformer sound

(11)Oil BDV Test ______ KV


Signature _____________
Name ________________
DATE:____________
PARTY NAME:__________________________________________

CAPACITY: ____________

[1] MEGGAR

HV TO BODY: ___________ M Ohm


LV TO BODY : ___________ M Ohm
HV TO LV : ___________ M Ohm

[2] RATIO TEST : 440 V

PRIMARY VOLTAGE : UV 1U 1V:________ 1V 1W: _________ 1W 1U: _________

Tap
Position Theoritical 2U 2V 2V 2W 2U 2W Theoritical 2U-N 2V-N 2W-N
1 L1
L2
2 L1
L2
3 L1
L2
4 L1
L2
5 L1
L2
6 L1
L2
7 L1
L2

[3] SHORT CKT TEST

TAP-1 Clipon meter Bench meter


Voltage Primary W1
Amp Primary W2
L1 Amp Secondary
L2 Amp Secondary W1-W2
TAP-2
Voltage Primary CT
Amp Primary Meter MF
L1 Amp Secondary Loading MF
L2 Amp Secondary
TAP-3 Total
Voltage Primary
Amp Primary
L1 Amp Secondary
L2 Amp Secondary
TAP-4
Voltage Primary
Amp Primary
L1 Amp Secondary
L2 Amp Secondary
TAP-5
Voltage Primary
Amp Primary
L1 Amp Secondary
L2 Amp Secondary
[4] OPEN CKT TEST
Clipon meter Bench meter
BEFORE TANKING
TAP-3 Voltage Secondary
Amp Secondary

AFTER TANKING W1_______


TAP-3 Voltage Secondary W2_______
Amp Secondary W1-W2______

[5] VECTOR GROUP DY 11

1U 2U= SHORT 1U 1V=______ 1V 1W=_____ 1W 1U=_____

1U 2U =_________V
1V 2V =_________V
1W 2W =_________V
1W 2V =_________V HIGH VALUE

[7] RESISTANCE TEST

HV 1U 1V = _______ohm LV 2U 2V = _______ohm 2U-N = _______ohm


1V 1W = _______ohm 2V 2W = _______ohm 2V-N = _______ohm
1W 1U = _______ohm 2W 2U = _______ohm 2W-N = _______ohm

[8] HIGH VOLTAGE TEST

With Stand 28 KV For 1 Minutes Yes/ No ______

Signature _____________
Name ________________
JOB CARD No DATE:____________
CAPACITY: ____________

[1] MEGGAR
HV TO BODY: ______________ M Ohm
LV TO BODY : ______________ M Ohm
HV TO LV : ______________ M Ohm

[2] RATIO TEST : Primary voltage 11000 sec volt 433


Off circuit Tap Measured Ratio Required Ratio
Position 2U 2V 1V 1W 1U 1W Minimum Standard Maximum
1 > -7%

2 > -5%

3 > -2.5%

4 > 0%

5 > +2.5%

6> +5%

7> +7%

[3] SHORT CKT TEST Load test BY POWER ANALYZER


TEMP:
TAP-1 Primary Voltage
Primary Ampere
Secondary Ampere
LOSSES

TAP-2 Primary Voltage


Primary Ampere
Secondary Ampere
LOSSES

TAP-3 Standard Primary Voltage


Primary Ampere
Secondary Ampere
LOSSES

TAP-4 Primary Voltage


Primary Ampere
Secondary Ampere
LOSSES

TAP-5 Primary Voltage


Primary Ampere
Secondary Ampere
LOSSES
[4] OPEN CKT TEST No Load Test BY POWER ANALYZER
BEFORE TANKING
TAP-3 Standard Voltage Secondary
Amp Secondary
LOSSES

AFTER TANKING
TAP-3 Standard Voltage Secondary
Amp Secondary
LOSSES

[5] VECTOR GROUP DY 11


1U 2U= SHORT
Applied volta 1U 1V=____1V 1W=___ 1W 1U=_____
1V 2V =1V2W=_________V
1W 2V >1W2W_________V HIGH VALUE

[6] RESISTANCE TEST


HV at terminals 1U 1V = ohm
1V 1W = ohm
1W 1U = ohm

2U 2V = _______ohm 2U-N = _______ohm


2V 2W = _______ohm 2V-N = _______ohm
2W 2U = _______ohm 2W-N = _______ohm

[7] High Voltage Test Separate source voltage withstand test


With Stand 28 KV For 1 Minutes on H Yes/ No ______
With Stand 3 KV For 1 Minutes on LV-433 V

(8)DVDF Test Induced over voltage test


With stood 866 V at 100 Hz for 1 min Yes/No _______

(9)Magnetic balance test

(10)Sound level test


Ambient sound
Sound while O.C.
Net Transformer sound

(11)Oil BDV Test ______ KV


Signature _____________
Name ________________

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