Answer Posted / venki

Distance protection relay is mostly used to detect the fault which occurred at a specified distance normally these are used in 66 kV and above Transmission levels. the total line is divided in to some zone for a specified distance and those zones are named as A,B,C and etc., if a fault is occurred it will indicate the zone where it is occurred.

How each of the following losses occur in d.c machines (i) copper (2)core (3) windage (4)friction please help me

2084

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what you have to see after one week or month from the day of installation of transformer ?

1753

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how does an centrifugal and screw type chiller will work. which chiller efficiency is high and why.

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iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

2304

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can anybody sent me power grid questions. what subject should i prefer for preparation?

2161

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What does a Bode plot tell you?

1364

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If a air condition consume 2.50 to 3.00 amp then how much it will consume in watts if it is running 10 hours out of 24 hours????

1913

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Discribe type of fault in DOL and stardelta startor.

2288

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how many parameters can integrate with fire alarm basically ?

2017

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why T/F winding temp measurement cts are odd secondary current ie,109A/1.2A/1.4A?

1918

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in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.

1923

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1.why are not using acb 33kv ht side? is there any problem 2.what is difference between acb,vcb,sf6 breackers? 3.what is the function of invertor and convertor in ups?

2215

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What is the reason that the humming sound is coming from the induction furnace panel?

2663

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Explain cos(theta) and Sin(theta)

2155

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what is the requirement regarding earthing of Single conductor with AWA

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