Explain the experiment on ward leonard method of speed control of a dc shunt motor.

2 Answers  

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In CTs tan delta point should be earthed , what is the reason behind it?

0 Answers  

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What does the temperature (30 deg or 35 deg celcius) mark on conservator of transformer indicates?

2 Answers   MahaGenco,

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why does fans rotate in anticlockwise direction?

1 Answers  

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lightning arrester rating selection procedure: (line to line voltage(kV)/(squ.root of 3))*squ.root of 2. now the question is, IS this above formula correct for both STAR and DELTA connected system???

1 Answers  

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WHY RATING OF VCB NOT LESS THAN 630A

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how did the testing of protection relays done through current injection

0 Answers   Bhel,

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why ups rated in kva

1 Answers   MRF,

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At what condition differential relay will act in transformer and ht motor?

1 Answers   Equate,

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why we use Test Terminal Block in 11 KV and 33 KV electrical panels.

0 Answers   EMC,

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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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how to calculate micom relay earth falt time and current sertting

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