Answer / k.prakashchandra

Potential free means 'zero potential' ,not connected to any
power supply

Answer / vels

potential contacts means the contacts are connected with some potential we cannot use our the contacts
whereas potential free contacts means it is not connected with any potential we can connect/use as per our requirement

if you asked to choose a ckt breaker from MCB & MCCB for 32A which one will be best and why??

7 Answers  

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what is advantage of using star to delta in place of dol starter

4 Answers  

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for 5KW resistive load can anyone please suggest me whether to go for UPS/Inverter or Generator depending upon cost calulations

0 Answers  

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What are the various kind of cables used for transmission?

0 Answers  

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"TRANSFORMER MODELING AND ANALYSIS" MEANS WHAT AND WHICH TOPICS U READ IN THIS

0 Answers  

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how to calculate generator capacity?(kva)

2 Answers   SMEC,

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1) Why distributiion system decided 11 kv, 33 kv, 66 kv, 132 kv, 220 kv, 400 kv, 2) In 3 Phase line terminal of capacitor, why used for power factor improvement. 3) Why used rating KVA in transformer?

1 Answers  

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How to calcualte the total number of cells required for particular UPS of some X KVA with 3 and 5 hours back-up?

1 Answers   JLL,

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We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For this we have a 33KV/11KV switch yard having 12.5MVA power transformer. Some times we draw power during emergency. It is observed that during Export or Import for load less than 500Kw the power factor is decreasing to 0.3 . This is happening only during export or import. During island condition TG power factor OK.Our capacitor bank is provided with our Power plant auxilliary load. Please suggest how I can we improve our power factor during low load (GRID).

3 Answers  

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which is best ac or dc

3 Answers  

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why in an electrical lab a bulb connected to supply goes off slowly when the main supply is switched off?

2 Answers  

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how many safety really of DG sets.

0 Answers   MBD, Nerolac,

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