Answer Posted / naresh

In 400kV switchtard CVT is used for Voltage mesuring
(Protection & Metering purpose) and supply for wave trap.

wave trap is used for distence protection and communication
between sub stations.

For distence protection of line:
By using of wave trap triping time is less compare to relay
triping time.

What is difference between mcb and mccb.

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We are planning to synchronized DG's with our captive plant in the event of black start of plant, but before sync we checked voltage of DG with our plant voltage and it varies from 5 V to 450 V. So in this condition how we can sync DG with plant ?

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