Why 60Hz frequency is used in America what are all the benifits?

5 Answers  

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how much amp MCB is required for 1/2 kva power back up?

2 Answers   Havells,

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what should be the air clearence between phase to phase, phase to earth in Medium voltage switchgear for 3.3kv,6.6kv,11kv,22kv and 33kv? Which is to be referred for this?

1 Answers   DLF, Sanmar, SEC,

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why fuse not recomended to neutral

10 Answers  

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difference between high and low impedance BUS BAR relay??

0 Answers  

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can I connect step down transformer(25KvA,240V Phase to phase)to output of online UPS(15KvA,440V PHASE TO PHASE) Load connect to TRANSFORMER is 13KvA,240V PHASE TO PHASE. please brief if it is wrong

1 Answers   DRJ ARDE,

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Consider a case that two 200 hp motors are connected to 500KVA transformer. For improving power factor can we add capacitors in common bus bars to motors. Or should we add capacitors for each individual motor?

2 Answers  

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why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?

0 Answers  

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how to calculate the load on transformer..????

2 Answers   Bhel,

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The speed of a dc motor can be controlled by the variation of 1. armature voltage. 2. field current. 3. armature circuit resistance. 4. angle of brush shift. Which of the statements given above are correct? (a) 1,2 and 3 (b) 2,3 and 4 (c) 1,3 and 4 (d) 1,2 and 4

1 Answers  

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Capacity of circuit breakers all types

1 Answers   Megatron Solutions,

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what is the isolation transformer. what is the isolator?

0 Answers  

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