6.2.to short-circuit of the coil in each of the transformer in order to pressure test has equal value, in each phase
6.3. Test Voltage defined as follows:
- if test is rated coil voltage from 3,300 V.up to test pressure with 2,500 Vdc.and calculated Polarization Index (PI)
- if test coil is rated voltage less than 3,300 V. Come down to pressure test with 1,000 Vdc. At 1 minutes
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