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.

working principle of UPS

15 Answers   Mantri,

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why co incidence factor considered in transformer sizing?

0 Answers  

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what is the different ratings of ACB/VCB/SF6 which is used at HT side

3 Answers   Hosco,

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star delta starter single line digram

1 Answers  

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I hv a question regarding power factor improvement just after transformer. I request you to reply me plzz. thank you sir. My friend has a small unit of fabrication. in his factory the main load is a welding machine, lathe machine, grinding machine. this load is not continuous type. now our electricity board has installed 16 KVA, 11000/433 V transformer for our factory. In the energy meter (trivector meter) at LV side of transformer, i hv seen power factor value of 0.15 only when only 3 KW load was flowing. Further electricity board has suggested to install 4 KVAR capacitor at LV side after energy meter. Now my question is that if we permanantly install and switch on 4 KVAR capacitor after energy meter, during some load on transformer and also without any load on transformer, wht will be the power factor shown in energy meter?i dont want to get any penalty by electricity board, so plz suggest me if i can permanantly install and switch on the 4 kvar capacitor or not at LV side of transformer just after energy meter? Thank you again and awaiting for ur positive reply soon.

9 Answers  

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What is the suitable rating of MCB for 1.5 Ton A.C and why? 1Ton= how many amperes?

5 Answers   BARC,

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in india why the generating voltage is like 11kv,22kv etc

1 Answers   Alstom, Ford,

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how netral CT is selected (including its details specification)

8 Answers   ABB, ABC, dbpl, Mecon, Shree Engineering, Tapasya Transformers,

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How to test lightning Arrester?

0 Answers  

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Explain in details how you would react to an unexpected incident when your supervisor or manager is not around to give instructions?

1 Answers  

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induction motor. we have a three phase supply from diffrent source like R= transformer. Y = DG sets. B = ups. if motor is runing.

4 Answers   Birla,

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What is “pu” in ee?

0 Answers  

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