Answer / vishnu ps

One way gang switch is used to control single/multi
light/load(or combined) points with one switch,eg switch
for toilets(when the switch is "on" Ex.fan as well as light
will work),two way one gang is to control single/multi
load/light points with two switches,eg-staircase/balcony
lights

what is the function of anti-pumping in circuit breaker?

20 Answers   Aditya Birla, INEL, NCC,

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Dear Sir how much cable size required from 0.75 kw to 50 kw for electric motor or pump

1 Answers  

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why does the magnetic balance tests at transformer?

0 Answers  

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Explain the working principle of Synchronous Generator and Assynchronous generator?

11 Answers   TATA,

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why HT armoured cable does not glanding

0 Answers   TCE,

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how megger step up the DC voltage

1 Answers   Voltech,

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In scott connected transformer number of turns in the primary winding of teaser transformer is % of number of primary turns of main transformer A 86.6 B 57.7 C 14.4 D 33.3

1 Answers  

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why overload relay is not tripped at time of starting of motor allthough staring current is too high?

5 Answers   TATA,

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We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

5 Answers   Siemens,

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how to calculate insulation level of transformer?

0 Answers  

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HT motors are generally connected in star, what will be the effect if we connect HT motor in Delta?

6 Answers   Equate, Ion Exchange,

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can a 12v dg starting battery(150 AH) be replace by 6 nos of 200AH batteries each of 2v connected in series.

3 Answers  

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