Answer Posted / rakeshsingh41

transmission voltage in india 765kv.

How to Prepare preventive maintenance shedule of machine tool.

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Please give me a erda placement paper

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In HI POT test what is reason for applying the AC VOLTS and DC VOLTS in different applications what is the nessesity for this ?

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What is earth?

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I am B.E.electrical engineer having 7 years of experience in Transformer testing upto 315 MVA.I want to khow how I can get the 'Electrical Valuer' License.

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how to design step down 12 V, 1mA small transformer from 220 V AC? Because according to VI relation and power transfer it results bulky...

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how to differentiate a mpcb,mcb with a contactor? Explain their working operation

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Why we use ups battery and dsdb battery in thermal power plant

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Why we find the sensitivity for the CT's to check?

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what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker

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How to calculate no of EARTH PIT? Describe the formula as per IS standard?

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any earth foult trip the relay but in welding time not trip by earth foult

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following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

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what will happen reduce the transformer voltage from 415v to 406v, is it save the energy,? are this methodis good to reduce the energy.?

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Define demand factor?

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