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ABB Interview Questions
Questions Answers Views Company eMail

what is formula in determining the size of Circuit Breaker for transformer with the following specifications. 7 units of 1600 volts (primary) and 400 volts (secondary). Both Primary and Secondary will have a circuit breaker which is SF6. What should be the Switchgear Main Breaker Size anf the sizes of each brances Circuit Breaker for Primary.

1 4106

Why all the drains(Gland sealing,ESV,Casing inlet etc) are directly connected to the flash tank instead of hotwell of the condensor in the power plant? My Email Id:naba02222@gmail.com

1851

How to reduce power factor correction capacitors failure in an industrial environment with vsd and computers usage in the system

2 3861

what is radar type level transmitters and its basic principle and how to calibrate it

4 19138

What is the reason for not giving very High Proportional Gain Kp in PID Controller?

2 6962

what is the difference between E/P positioner and I/P positioner in control valve , in which application the respective positioner are used in.

1 5671

what is goodwill?

6 6873

why plc need seprate earthing?

2 11389

where any change in supply line due to the incipient faults in three phase induction motor

2 4001

what is difference between fuse and breaker?

6 8120

suppose if oil in transformer is not used than what constructional change you will do,for insulation and cooling?

2 5261

why are transformers rated in KVA and not in KW

8 12305

why our power production in multiples of 11.

2 4415

which relay is used on long transmission lines

10 29714

What is the basic difference among IPS,UPS,EPS?

2 17197

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2031