Answer Posted / maha

The anser is Differential relay because the examinor asked
the question in the sense of power tranformer. but buch
hole relay is used for tranformer internal faults..

What size cable (based on voltage drop) is required to supply a 40 A three phase boiler if the wiring system is 75V single insulated cables installed in non-metallic rigid conduit 56m from the main switchboard? Voltage drop in the consumer's mains is 8V.

1974

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how can check the resistance of battery contact?

2197

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What are the limitations of Kirchoff's laws?

1587

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how current is reverse from its normal direction during the fault?

2454

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Which motor connection is preferable star-delta or delta-star?

1081

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how net resistance islow in star connection and viseversa in delta connection...? if anybody could explain in detail it wud be helpful.

1602

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WHaT IS THE CONCEPT OF INDUCTION LAMPS IN MODERN LIGHTINGS, and HOW IT WORKS TO EMIT LIGHT ( AS NO ELECTRODES ARE PRESENT ) ?" COULD INDUCTION LAMPS CAUSE INTERFERENCE WITH COMUNICATIONS INTO A STORE USING INDUCTION LIGHTING ? WHAT IS THE BENEFIT OF USING THE LOW FREQENCY INDUCTION LAMP , VERSUS LED , AND VERSUS FLUORESCENT, AND VERSUS ANOTHER KIND OF LIGHTING . THANK yOU MOISES GUINDI

2066

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How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

2073

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is all the servo motors having brake?please specify which servo motors having brake for stop on position and which are not.

1773

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How delta connection in the primary of distribution transformer reduces harmonics?how delta connections reduces harmonics?Please answer me...Hope that question is correct.

2208

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what is the eight bit unit?

2444

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What is the formula to calculate a three phase alternator

2335

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How do you select the pickup value of the relay?

1332

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what is the relationship between current&voltage in practical purpose ?

5023

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In CTs tan delta point should be earthed , what is the reason behind it?

3021

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