Answer / aakash

the auxiliary protections in a transformer are:-
1) buckholz relay
2) oil level indicators
3) temperature monitoring devices
4) on-line tap-changers
5) valves

how to calculate the KVAr for an motor for improving the PF

3 Answers  

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what is the safe meggar values for motor, transformer HT, LT and Cables? IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace. why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero

0 Answers   Jindal,

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What is differential relay? How it operates?

1 Answers  

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Why in power plant projects we see DOL starting method used for motors upto 160 kW instead of star delta method

0 Answers   UCC,

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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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what is the difference between watts and volts?

2 Answers  

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How to calulate cable size for 200KVA,160KVA& 40KVA load?

1 Answers   ABB,

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Why we are putting off the APFC(automatic power factor control) panel while the generator is running?

4 Answers   National Steel,

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what is meant by cbct elr?

3 Answers  

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how we calculate electrical load on a building according to area?

0 Answers   HFCL,

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what is the difference between servo voltage stabilizer and general voltage stabilizer?

1 Answers  

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what is the saturation point of crgo lamination.

0 Answers  

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