Station Service Transformer Function. I have a 220/60/15kv power transformer. The secondary is grounded through a 2.4 ohm neutral resistor rated at 2400 volts and 1000 amps for 10 seconds.
Unit auxiliary transformer is used to deliver the power to the motor, fans, pumps, lightings etc. The secondary is grounded through a 2.4 ohm neutral resistor rated at 2400 volts and 1000 amps for 10 seconds. I work in ntpc so i feel obliged to answer this question.
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By my calculations the maximum current in the tertiary will be 20mva/(1.73x 15kva)=769,8a. Generating station substations transform generation voltage (usually 15 kv through 23 kv) up to transmission network voltage (usually 69 kv through 500 kv).; It helps to avoid unplanned outages and minimize planned downtimes. (b) a sea cable that transports the power ashore;