A group of machines (wind turbines) connected with 33KV feeder and each machine

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?

Question Posted / apnesan

1 Answers
3425 Views
I also Faced
E-Mail Answers

A group of machines (wind turbines) connected with 33KV feeder and each machines are having individ..

Answer / k.prakashchandra

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

Post New Answer

More Electrical Engineering Interview Questions

How to calculate battery back up time for a 400 AH battery bank installed in telecom shelter for a load of 20 Amps and time taken to fully charge this battery bank?

3 Answers

WHAT IS BASICS TO SELECTION OF 11 kv Trasformer, send any calculation sheet for selection of transformer

3 Answers NBCC,

what is difference between inductive and reactiveload?

5 Answers ONGC,

why in three phase 440 circuit in all phase current is almost equal L1-35 A,L2-34 A ,L3-31 A but in nutral when i check with clamp meter it shows 25 A?

4 Answers OPS,

What is a difference between indoor transformer and outdoor transformer of same rating

0 Answers Suzlon,

WHAT DRESS I SHOULD WEAR WHILE ATTENDING AN INTERVIEW? PLEASE SPECIFY THE STYLE AND COLOUR. CAN A LADY WEAR CHUDIDAR FOR AN INTERVIEW?

6 Answers Wipro,

how capacitor control the power factor/

2 Answers ABB, Apollo,

How many loops can be provided in a circuit as per IS rules.?

1 Answers

what is the difference beteen differential protection and over current protection of an alternator

2 Answers GVK,

What is the difference between induction motor and the Synchronized one?

4 Answers Foxconn, Sabic,

1 tr is equal to how many Kw .is there any specific formula for this to get the result .

13 Answers Cipla, LG, NSN,

1 HT service how many LT Service

1 Answers

For more Electrical Engineering Interview Questions Click Here