Answer / koti

VCB upto 33 KV only. SF6 for EHVs.

Answer / rajiv pandey

both are circuit breaker.VCB in use only 11kvbut SF6 use in
above 11kv .SF6 is costly project then VCB.

How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?

0 Answers  

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How do u analyse protection fault when vcb tripping on load

0 Answers  

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Can you any one explain different between instantaneous over current and IDMT

1 Answers  

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Why are calling leading power factor is a capacitive load?

1 Answers  

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why the earth pin is thicker than other pins in a plug? If it is for reducing resistance, then why the copper earth wire is not so thick as earth pin of socket?

5 Answers   Omax,

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What is the difference between MCB & MCCB, Where it can be used,

22 Answers   ACB Group, Badve, Bajaj Electricals, Hensel, Siemens, SR,

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in which direction real power and reactive power flow and why???????

3 Answers  

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what is the RESTART INHIBIT protection?

1 Answers   Thermax,

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IF avr is voltage regulator of genset means why we are giving genset CT sense to AVR ?

3 Answers   ABB,

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heat can flow from a body at low temperature to a body at higher temperature only when ........ is supplied from an external source A). Voltage B). Current C). work D). Mass

7 Answers   BMRCL,

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Due to ferranti effect which power increases at the receiving end?active power or reactive power?

5 Answers  

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my project load is 6 MW so please suggest the size of cable.. ALU 3c 400 aqmm cable can be sufficient.. is there any thumb rule for calculation of cable size please help me

1 Answers  

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