COMPREHENSIVE TEST PLAN
 
 
1 Pressure Test » Apply 5 LBs/Inch2 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.