Answer / bandarawy

The normal bias setting in a differential relay is 20%.
So, complete earth fault protection is not possible with
differential relay. That is why you need a seperate earth
fault relay with sensitive settings like 5%.

Why double earthing is required ?

1 Answers  

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In auto transformer if power transferred inductively and conductively are same, the ratio of output/input voltage is A 1 B 0.7 C 0.5 D none of above

2 Answers   Getco,

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name the famous power plants present in A.P

1 Answers   Power Grid,

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Electricty is generated at around 16kV, then step up to 220kV for transmission then steped down to power transformers then DTs and then through the LT n/w it reaches the consumer end. At the consumer end 230V supply is required. So, why is electricity not generated directly at 230V and transmitted?

4 Answers  

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HOW WE CALCULATE CURRENT IF THERE ARE NOT PRESENT ANY AMMETER OR MULTIMMETER??????

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What are motor generator sets and explain the different ways the motor generator set can be used ?

0 Answers  

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derive the e.m.f equation of transformer

2 Answers  

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From stability point of view,What(higher/lower) should be the value of inertia constant of rotating machines?

1 Answers  

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Can the output voltage of a rectifier be greater than the input AC voltage without the use of any voltage multiplier in the circuit??please provide the explanation too..

0 Answers   IOCL,

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what are the ratings of sockets?

10 Answers   L&T,

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In the diesel generator if there is an AVR (auto voltage regulator) gone faulty, in this condition is there any way to generate the voltage from the alternator? I need a brief explanation can you please help somebody

1 Answers   Vodafone,

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What are the disadvantages of hydropower?

0 Answers  

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