A group of machines (wind turbines) connected with 33KV feeder and each machines are having individual VCB. The 33KV feeder connected with 110KV/33KV substation. The 33KV feeder tripped by over current at Substation and fault recorded at Substation as OC-R&Y phase. Same time the group of machines VCB tripped by over voltage, the fault recorded voltage was above 66KV by numerical Under/Over voltage relay. While grid drop time, this much of voltage hike is possible?

1 Answers  

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what is the kvar, droop, stability,ramp

1 Answers  

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. Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV, 20kV, 30kV?

3 Answers  

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I have a 33 KV sub stn with two mother transformers 33/11 KV of capacity 3150 and 1600 KVA respectively. The total connected load 16809 KVA(11/0.433KV).how i calculate the max current & how i decided the CMD.

2 Answers  

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An engineer measures the direct current resistance of a transformer using ohm meter. When he/she takes out one of the leads of the meter, spark comes.. Why ?? This effect is known as...

1 Answers   Saint Gobain,

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application s to shunt coil

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Explain what is clipper and clamper circuits?

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how a vibration switch's high signal will going to trip the motor? can u explain with some examplesand wiring diagrams?

1 Answers   Bhel, Wartsila,

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What are the disadvantages if neutral current exists in grounded star transformer distribution system?

1 Answers  

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Difference in load break switch, isolator and circuit breaker.

1 Answers   KSEB, L&T, Siemens,

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What is the Harmonics??????????

5 Answers  

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what is the difference between brushed alternator ,brushless alternator & permanent alternator ?

1 Answers  

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