Answer Posted / william lobo

The height of the building is not a creiteria for
installing of lightning arrester. If this is the only
building in the area then we have to install the lightning
arrester. But generally it should be installed on the
highest building or tower in the immediate vicinity.

It consists of spikes which can be installed on the
perifery of the building at distances of about 15 to 20
feet.

testing of protective relays will be discussed later.

What is the maximum breakdown voltage of 11KVA and 66 KVA power line and how it is calculated?

2290

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What are diffrent type of road taxes?

2028

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what is the use of power transformer in GSS.

2490

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why they were using TRIAC instead relay in some controllers and what is the advantages.

2029

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Why is remote backup preferred to local backup?

2069

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if there is nutral in phase why we use earthing wire and grounding? even at fault condition the fault current flows to neutral (it is a lower path)

1843

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can we choose current transformer secondary, to calculate residual flux in a power transformer, so as its saturation is close to the saturation level of power transformer?

1506

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why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?

2930

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2430

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what is mind in cable

2071

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please send me latest & previous years question papers for IOCL Technical level questions

1887

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can anybody tell me that for p.f. Improvment we use capacitor banks but how to decide its capacitance. As we all know how to calculate kvar but what abt capacitance value

1865

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Define liftable weight of a transformer? Does the total weight of transformer include oil weight?

2495

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what is the minimum (Common factor) insulatin resistance of the following a, 4mm sq wire b, cable from 50 mm sq to 800mm sq

2108

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how to calculate the magnetizing current of ct ( 800A/1A) for Relay 64

1454

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