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?
The load throw-off may result in run-away speed being equal
to twice the normal speed ,hence the voltage may also become
twice. Over voltage relay should be set at not more than
120%.You can employ the AVR so that the voltage does not
increase with the speed.
Is This Answer Correct ? | 1 Yes | 0 No |
please tell me, how i clear the objective test? when i studied form the one book after i solved the objective ,that time i solved that qes. but if i tried solve objective form the other book then i could not solved these que.
please explain to me how to calculate current,voltage,resistance with formula??
for 750 kw LT load what will be the ht kva
power is the product of voltage and current.so we can measure the value of power just by using ammeter and voltmeter.......then why do we use a wattmeter?
Briefly describe your ideal job?
Why is remote backup preferred to local backup?
what happens when power factor leads or lags to electical or home appliances
Which power will flow first if we switch on a motor Active or Reactive? How?
why most of the induction are delta connected?
What does the a,b,c of 95a,95b,95c relays denotes?
What will happen if " not connecting the neutral point to ground of diesel generator output (380 V)", also if someone touched one phase without isolation from ground during the A/M condition what will happen to him?
What is the difference between grounding & earthing?