Answer Posted / ritesh mishra

A circuit breaker is an automatically operated electrical
switch designed FOR OPRETE IN ABNORMAL CONDITION I.E. to
protect an electrical circuit from damage caused by
overload or short circuit. &
In an electric power system, switchgear is the combination
of electrical disconnect switches, fuses or circuit
breakers used to control, protect and isolate electrical
CKT.

i need previous entrence exam papers of nhpc.

2819

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state the disadvantages of carbon filament???

2913

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What is the reason behind current flow(20 A) in amain earth cable of an SMDB? Is cuurent flow(45A etc) through a neutral cable acceptable?

1965

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State magnitude criterion.

1104

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how is the testing of an REF relay? what are the test REF circuit having?

1985

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What is dc current source? Differentiate between ideal and non ideal current sources?

1451

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what are the types of electromagnetic forces developed in practical transformer?

2607

---

For refrigerators the motor current is raised beyond its rating on both conditions when the voltage of the system is more(say 270v) than the rated voltage(220v) as well as when the voltage of system is less(say 160v) than normal voltageof 220v, why explain?

1956

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WHAT DO YOU MEAN THE DIFFERENT TYPE OF CURVES OF RELAY LIKE STANDARD INVERSE, VARY INVERSE, NORMAL INVERSE, LONG INVERSE ETC....

1954

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How out of step protection relay works?

2409

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describe the Tranformer testing procedure

1862

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sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company

2167

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What was your role in the silicon evaluation/product ramp? What tools did you use?

1943

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whate is the meaning of balance/unbalance,in stabilizers type

2126

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Explain the experiment on ward leonard method of a speed control on a dc shunt motor with an suitable circuit diagram.

2575

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