Answer / rajesh

Extra low voltages means reduced voltages that are used for lightings in parks,swimming pool to eliminate risks of electrcal shocks.

AC voltages below 50VAC and dc voltages upto 120V are cosidered as ELV.

Answer / kiran v

Hello mr sir low
voltage means not
upto 250v.... Low volt
means 1000 volts

Answer / k.prakashchandra

Low voltage is up to 250 volts.There is no standard for
extra low voltage.

Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above

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What are the major reasons for balancing hydro-thermal mix?

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what shall be no load voltage of 132/33 kV transformer ? is it 33 kv of 34.5 kV

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The coils having selfinductancs 10mh and15mh,effective inductance 40mh when connected in series aiding. what will be the equivalent inductance if we connect them in series opposing?

1 Answers   BSNL,

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what are the methods of speed control of dc motor???

4 Answers  

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What is the problem if we connect a weak capacitor to the system? is that profitable or Loss?

1 Answers  

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I have installed capacitor bank at secondary transformer. cos phi is increase. but on load (far from transormer), it still poor. Can anybody explain it??

6 Answers  

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why do we have 230v a.c. as general voltage for domestic supply rather than others?

2 Answers  

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how does excitation of brushless alternator took place?

1 Answers  

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how Local Breaker Backup relay working?

1 Answers  

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How colour picturetube works & how many year it will works.

0 Answers  

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Dear all, Can anybody tell me that how to choose CT for a specific load? I have a 200kw induction motor, which ratio CT should be installed? Is there a formula or calculation that determines the CT ratio for a load? Regards.

2 Answers  

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