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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Anybody know how schematic diagram for reverse power relay? RPR for generator protection

0 Answers  

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What will happen if 2 phase supply is given to 3 phase motor?

4 Answers   ABC,

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what is grounding & what is the value of groumding rod 2.5m?

3 Answers  

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why capacitor do not switch ON the DG power? (I had checked, capacitor ON in DG power that time current rating was reduced.)

1 Answers  

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As we use capacitior bank in 3ph ckt for improvement of PF, why not we use capacitor in single phase domestric use, at our house their are many inductive equipments,like fan,mixer,tube choke,air conditioner they also draw PF... by using capacitor can they improve PF. if yes--what are advantage and how to connect a capactor in single ph,and which type of capacitor if no- what are disadvantages.

0 Answers  

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define reactive power?

3 Answers   Alstom, TATA, TCS,

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what are the affects of loose connection in electrical circuit.

14 Answers   HP,

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what happen when power factor of 2 parallely operated transformer become equle?

0 Answers   Flextronics,

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in our sub station why we step down firstly 33kv\11kv then 11kv to 430v. can we direct step down 33v to 430.v.

7 Answers  

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Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..

0 Answers  

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Triping principle of ELCB&RCCB? wht is the difference between these two?

2 Answers  

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