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COMPREHENSIVE TEST PLAN
1
Pressure Test
»
Apply 5 LBs/Inch
2
Pressure for 1 Hour
Observation - no leaks to exist.
2
Vacuum Test on tanks
»
Full vacuum on tank to check permanent deflection.
3
Measurements of IR Values
»
WI/INS/01
IR Values shall be
HV - LV = above 500 M Ohms.
HV - E =above 500 M Ohms.
LV - E =above 500 M Ohms.
4
Measurement of Turns Ratio
»
WI/INS/02
5
Vector Group Identification
»
WI/INS/03
6
Measurement of Dielectric Strength of oil, Resistivity and Tan-Delta
»
WI/INS/04
7
Winding Resistance
»
WI/INS/05
8
Open Circuit Test
»
WI/INS/06
9
Short Circuit Test
»
WI/INS/07
10
Separate Source Voltage Test
»
WI/INS/08
11
Induced Over Voltage Test
»
WI/INS/09
12
Magnetic Balance Test
»
WI/INS/10
13
Zero Sequence Impedance Test
»
WI/INS/11
14
Noise Level Measurement
»
WI/INS/12
15
Capacitance and Tan-Delta of winding
»
WI/INS/13
16
Harmonics in Magnetising current
»
WI/INS/14
17
Partial discharge Measurement in H.V Transformers
»
WI/INS/15/td>
18
Temperature Rise test
»
To Check Guaranteed Temperature rise of Oil/Windings
19
Type Tests such Impulse and Short Circuit shall be carried out at CPRI
»
N.A
NOTE: The above tests will be done as per IS : 2026 - 1977 and IS 335 - 1993.