|
Sr.No
|
Tests
|
Sr.No
|
Tests
|
|
1
|
Measurement of Voltage Ratio and Check phase displacement
|
26
|
Measurement of harmonics
|
|
2
|
Measurement of winding resistance
|
27
|
Measurement of acoustic noise level
|
|
3
|
Measurement of insulation resistance
|
28
|
Measurement of power taken bycooler circuit
|
|
4
|
Measurement of no load loss and no load current
|
29
|
Measurement of Zero phase sequence impedance
|
|
5
|
Test to prove overfluxing capability / oil soaking
|
30
|
Temperature rise test for overloading cycle
|
|
6
|
Measurement of load loss and impedance voltage with Calculation of Stray loss,
copper loss, total copper loss, impedance, measured loss, corrected loss, load
loss at 75C and ambient temperature
|
31
|
Temperature rise test with curve generation and gradient
calcualtion.Automatically data logging from temp.scanner and resistance meter
|
|
7
|
Three winding losses of three phase transformer
|
32
|
Lightening impulse voltage withstand test
|
|
8
|
Measurement of impedance voltage
|
33
|
Lightening impulse voltage withstand test for neutral winding
|
|
9
|
Measurement of single phase impedance
|
34
|
Measurement of transferred surge voltage
|
|
10
|
Calculation of efficiency and regulation
|
35
|
DGA test on oil before and after impedance rise test
|
|
11
|
Seperate source voltage withstand test
|
36
|
Oil BDV test
|
|
12
|
Induced over voltage withstand test (uniform / non uniform insulation method)
|
37
|
Water content test
|
|
13
|
Induced over voltage withstand test with partial discharge
|
38
|
Measurement of vibration of transformer at rated excitation
|
|
14
|
Magnetic balance and magnetising current test
|
39
|
Functional check of control panels
|
|
15
|
Measurement of no load loss and no load current at low voltage
|
40
|
Switching impluse voltage withstand test
|
|
16
|
Measurement of load loss and impedance voltage with spill current
|
41
|
Oil leakage test
|
|
17
|
Measurement of load loss and impedance voltage at low voltage
|
42
|
Pressure deflection test
|
|
18
|
Measurement of single phase / three phase short circuit impedance
|
43
|
Vacuum deflection test
|
|
19
|
Magnetic circuit test
|
44
|
Test on pressure relief device
|
|
20
|
Check of ct ratio and polarity
|
45
|
Jacking test
|
|
21
|
Check of ct knee point voltage
|
46
|
Measurement of oil quantity for first oil filling
|
|
22
|
Check of ct dc resistance
|
47
|
Visual inspection and dimension test on assembled transformer
|
|
23
|
Test on on-load tap changer (OLTC)
|
48
|
Caliberation of WTI & OTI
|
|
24
|
Measurement of capacitance and dissipation factor with Capacitance and Tan Delta
at 20 C correction for Before high voltage,after high voltage and for bushings
|
49
|
Frequency response analysis
|
|
25
|
RSO test
|
50
|
Thermal Imaging
|
|
|
|
51
|
Dew point measurement
|