Sl.
No. |
TESTS |
INFORMATION
PROVIDED BY TESTS |
1 |
Insulation Resistance (IR) |
Indicates the dryness and
cleanliness of winding. |
2 |
Polarization Index (PI) |
It is a direct measure of
dryness of winding. |
3 |
DC Absorption Test |
Indicates insulation condition
of the winding. |
4 |
Capacitance & Tan
Delta Test |
Indicates dielectric loss
in the insulation. |
5 |
Leakage Current Test |
It helps in prediction of
break down voltage. |
6 |
Furan Analysis Test |
Indicates deterioration of
paper insulation. |
|
| |
| 3. Condition Monitoring Tests on H.T. Motor: |
Sl. No. |
TEST |
INFORMATION PROVIDED BY TESTS |
1 |
Capacitance & Tan Delta |
Indicates the dryness and cleanliness of winding. |
2 |
Insulation Resistance |
Indicates insulation condition of the winding. |
3 |
Polarization Index |
It is a direct measure of dryness of winding. |
4 |
DC Absorption Test |
Indicates insulation condition of the winding. |
5 |
DC Resistance |
It is a measure of individual phases and between turn short can be located. |
6 |
Leakage Current Test |
It helps in prediction of breakdown voltage. |
7 |
Surge Oscillograph |
|
8 |
Rotor Balancing |
|
|
| |
|
| 4. Circuit Breaker Testing: |
Sl. No. |
Particulars |
1
2
3
4
5 |
Measurement of tripping & closing time.
Measurement of contact resistance.
Measurement of dielectric strength.
Insulation Resistance (IR).
Polarization Index (PI). |
|
| |
|
| 5. Electrical Tests on HV Cables: |
Sl. No. |
TEST |
INFORMATION PROVIDED BY TESTS |
1 |
Capacitance & Tan Delta |
Indicates dielectric loss of the insulation. |
2 |
Insulation Resistance |
Indicates insulation condition between cores and between core and sheath. |
3 |
Polarization Index |
Indicates insulation condition. |
4 |
DC Absorption Test |
Indicates dielectric loss in the insulation. |
5 |
DC Resistance |
Indicates healthiness of the insulation. |
6 |
Leakage Current Test |
It helps in finding out leakage current in the equipment. |
|
| |
|
6. Electrical Tests on CT/PT/CVT/Grading Capacitors: |
Sl. No. |
TEST |
INFORMATION PROVIDED BY TESTS |
1 |
Capacitance & Tan Delta |
Indicates dielectric loss of the insulation. |
2 |
Insulation Resistance |
Indicates dryness and cleanliness of the winding /capacitors. |
3 |
Polarization Index |
It is a direct measure of dryness of winding /capacitors. |
4 |
DC Absorption Test |
Indicates insulation condition of the winding / capacitors. |
|
| |
|
7. Condition Monitoring tests on Shunt Capacitor: |
Sl. No. |
TEST |
INFORMATION PROVIDED BY TESTS |
1 |
Capacitance |
Indicates dielectric loss of insulation. |
2 |
Tan Delta |
Indicates dielectric loss of insulation. |
3 |
HV Test |
It helps in prediction of breakdown voltage. |
4 |
Insulation Resistance (IR) |
Indicates dryness of the capacitor. |
5 |
Polarization Index (PI) |
Indicates dryness of the capacitor. |
6 |
DC Absorption Test |
Indicates detoriation of paper insulation. |
7 |
Leakage Current Test |
It helps in prediction of withstand voltage. |
|
| |
| 8. Inductive Voltage Transformer: |
Sl. No. |
Particulars |
1
2
3
4
5
6 |
Capacitance & Tan Delta Test
Insulation Resistance Value (IR).
Polarization Index (PI).
DC Absorption Test.
Ratio Test.
Polarity Test. |
|
| |
9. Capacitive Voltage Transformer: |
Sl. No. |
Particulars |
1
2
3
4
5
6 |
Capacitance & Tan Delta Test.
Insulation Resistance Value (IR).
Polarization Index (PI).
DC Absorption Test.
Ratio Test.
Polarity Test. |
|
| |
10. Electrical Tests on Lightning Arrestor: |
Sl. No. |
Particulars |
1
2
3 |
Insulation Resistance (IR).
Polarization Index (PI)
DC Absorption Test. |
|
