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.

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

0 Answers   Reliance, Vascon,

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what are the differenc between vcb and sf6 breakers

7 Answers   Google,

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HAT IS THE EFFECT OF LOW POWER FACTOR ON THE GENERATING STATION?HOW WILL YOU IMPROVE THE LOW POWER FACTOR?

1 Answers  

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when a cunductor is being disconnected from live cct, still it showing charged, if its checked by line tester?

8 Answers   GEB,

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What is the difference between diesel generator engine with and without turbo charger with the same capacity?

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difference between Ac and Dc mcb ????

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what is the difference between ceiling fan and wall mounteed fan technically

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can we use ZNyn11 transformer instead of Dyn11 transformer in distribution for effectively eliminating harmonics from the industrial loads.

0 Answers   DEWA,

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why cont we short earth and N.......?

3 Answers  

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WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

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What is time response of the control system?

0 Answers  

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what instruments used for measuring of inductance and capacitance.

2 Answers  

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