Answer / 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.

Generally In transformer Tap Changer on HT side, but I have seen in 66KV side in 220/66 KV, 100 MVA, Areva make transformer. Why ?

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List any four conventional sources of energy.

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How is a capacitor bank is designed ?

2 Answers   Asian Paints,

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Give the two basic speed control of DC shunt motor.

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Why we are not using capacitor in line when load on Genset?

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How does a star connection and delta connection work? How does the star connection save starting current and how does it change to delta?

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In a panel 2500A ACB is the incoming breaker then what is the size of the bus bar?

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what is called star connection and delta connection also purpose of this connections?

3 Answers   Siemens,

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Neutral CT for 45MVA 132/11 KV YNd11 Transformer. NCT REF CLASS-PS or 5P20 with 20VA burden which is suitable.

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What are the fire Estingushers use in electrical fire?

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If the kvar rating of capacitor bank is 600 kvar at 525V then what it's rating at 415v.

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if its possible for step up or step down DC volage directly ? possible means how we can do it ?

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