what is negative d.c. voltage, why this voltage is used in base transciever station.

0 Answers   Vintage Air,

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What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?

0 Answers  

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why Lightening Arrester Probe sharp at Top of telecom tower.

0 Answers   Reliance Jio,

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125Kva Dg can take up how much amphere load.

7 Answers   Indian Railways,

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In stepdown transformer 11/415 volt two nos.(R & Y)HT side fuse is blown ,what will be voltage of ry,rb,yb in secondary side

5 Answers   NTPC,

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What is the Difference Between MCCB & ACB & VCB

3 Answers  

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I have 11KV/415V power distribution transformer. I have found unbalance current in LT (415V) side. Also observed that unbalance voltage (3V) at LV side due to HV side unbalance voltage. What should I check for this? Also, the same LV side load can run in balance on captive power.

1 Answers  

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How DC earth leakage currents can be reduced ?

0 Answers  

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why does same amount of current flow in the circuit inspite of any number of resistances in the circuit?

3 Answers  

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Why dnt we generate 5-ph or 7-ph supply like as 3-ph supply

2 Answers  

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how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

0 Answers   Tyco,

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What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

0 Answers  

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