how you can select circuit breaker for 2000kva transformer?

Answer Posted / ashish patil

First find the full load current of transformer.2MVA
transformer current value comes near 2915 A. consider
overloading capacity 10%. it comes near 3100.
so u can select indor Air circit braker or 4000A
capacity.

Is This Answer Correct ?    29 Yes 12 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

how synchronous condenser is used in place of synchronous generator with out negotiating IEEE standards? Can i use 3 generators as synchronous generators and 2 generators as a synchronous condensers in an IEEE 14 bus system with out disturbing the standards?

1642


I need a formula to calculate the size of cable as per load but in the terms of length. Please Reply me as i search lot of sites but i did not get the answer.

1604


Formulae for calculating the transmission line losses for different voltage levels

1624


I want the details about BHEL company examination.Can anyone able to help me please.

1599


can i connect REF and Differencial relay in 1 CT core for transformer protection?

1467






Can anyone tell me some hints about what type of questions are asked by the interviewer by an Electronics engineer when company is installing an IPP and wants a team of engineers?

1811


In india, according to trade theory above 5 HP motor reqired star delta starter. But we R connect 11 KV motor with 14MW in Direct to line ( With VCB starter combination) Can U Guess, How it is possible ?????

1609


How to do cable sizing calculation for 750 A Neutral Earthing resistor for 33kv. the 33kv cable going to swbd. is 630mm2 3 runs.

4325


63MVA,220KV/6.9KV Transformer LV side neutral is connected to Earth pit through NGR. Whether this earth pit required to connect with near by below grouding earth mat or it is to be kept separate?

2300


What is resonant peak?

688


During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.

1447


1. What is the exact formula for one weber? for example,(one ampere = one coulomb electron of electrons crossing a point of conductor at one second. i.e, 1A=1Q/1sec)

1421


Can you tell me more about pu systems (per unit systems )calculation in large power systems? how to get the base for voltage and power in generator, transformator and transmission lines?

1807


how to control dc motor?

1424


what should be the acceptrd value of winding resistance for 2.5MVA transformer

1850