Answer / ravi kumar

Safety of vcb :[ Vacuum circuit breaker]
1: Earth fault relay
2: Master trip relay
3: Supervision relay
4: Short circuit
5: Shunt relay
6: Closing coil

Answer / arvind kumar

VCB SEFTY
Earth fault
Short circuit
Over current

Answer / kumar manish

VCB saftey-
1.Earth leakage
2.Current unwanted due to Short Circuit.
3.Over load

Answer / vijay raj

Oil type transfomar sefty ans dry type

Answer / bhanu pratap singh

all right

1. Why a DC motor starter is called 3 point starter

21 Answers   ABB, CG, College School Exams Tests, Crompton Greaves, Infosys, Siva,

How to calculate the efficiency of Turbo Generator(Alternator) in general....?

0 Answers   Thermax,

What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?

0 Answers  

what is the difference between LPF and UPF wattmeter and where it is used.

7 Answers  

how the harmonics are generated in transforemer?

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how will you calculate rated Primary and Secondary voltage and Current for 2500 KVA, 11kv/443V Transformer

2 Answers  

can SMPS work in DC supply ?

10 Answers   HCL, IBM, Reliance,

Could Please Explain briefly. Why used stabilizing resistance series with High impedance bus differential protection relay.

0 Answers   NCC,

How many types of losses occur in a transformer?

0 Answers  

How we calculat the NGR of 3phase Generator, Our generation voltage 11KV

0 Answers   MSP, Toyo Denki,

What happen if we apply square wave or traiangular waveform voltage to the transformer primary winding instead of sinusoidal wave?

0 Answers  

what will happen when excitation of a synchronous machine is suddenly reduce to zero when it is running at full load..??

7 Answers