Give two basic sprrd control scheme of DC shunt motor.

2 Answers  

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short notes on npn & pnp transisitor..........

5 Answers  

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What is the maximum load of 240mmsequre single core cable can carry?

1 Answers  

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Why L.T.Cable voltage rating is 1.1kV,where as system voltage is 0.415kV?

0 Answers   HCC,

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difference between earthing and grounding?

2 Answers   ABB, Bharti, L&T,

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what r the earthing required for commissioning of D.G set?

5 Answers  

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What is the difference between LT & HT Cable

4 Answers   ETA,

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what is the use of expulsition protective gap in 11Kv line.

0 Answers  

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One of our gas turbine generator unit "1st stage rotor ground fault" alarm was occured several times. we tried to measure some voltage vulue ground fault protection relay (UNS3020a made by ABB and we measured the value of: Ground: 0.9VDC 5V: 5.8VDC 24V: 23VDC u+: 300 – 350mVAC Rf1: 17.5mVAC Rf2: 17.6mVAC The unit still running and the alarm was reset. As of 6pm yesterday and unitl now no alarm happened again. I our protection relay was defective?

1 Answers  

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In a distribution system,having 3phases & 1 nuetral.ecah phase to neutral is 230V,line-line voltage is 440V,but what is the voltage of each line.but it should obey the KVL law.

2 Answers  

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the cheapest inducting instrument among all is a)pmmc b)moving iron c)electrodynamometer d)rectifier

2 Answers   APCPDCL, APEPDCL,

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what is meant by skew width in machines?

0 Answers  

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