Answer Posted / nimish

It is an inverse definite minumum time relay. In IDMT relay
its operating is inversely proportional to fault current
and also a characteristic of minumum time after which this
relay definately operates.

According to underground cables a) stress b/w sheath & conductor is high b) inrush of core & conductor

1912

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1)What is a Triode? What are its uses? 2) What is a Triac? 3) What is a Thyristor?

2549

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Why derating factor os applied on Cables?

1899

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A cable with concentric PE conductor must be used with frequency converter circuits what does its means.?

1527

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When are the directional relays used?

1000

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If i have two 3000 kW motors and the whole facility requires a 10 MVA transformer. What would be better installing two 5 MVA transformers(one for 1 motor ) or just a single 10 MVA transformer for both of them. Give reasons for your answer.

5935

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1887

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2232

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why there using acb enclosure in big buildings

2039

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why we not used 11kva as a direct our electrnics component.

2752

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During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.

1883

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Why is negative feedback invariably preferred in closed loop system?

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What is the important precuations need tocarried out while working with Electrolite in Battery PM?

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