Answer / amit biswas

general kW Vs Voltage ternd for motors as as follows
upto 250 Kw -414V
250-450 Kw-3.3 KV
above 450 Kw-6.6 KV

anyways these standrds can be avoided but this will affect
the size of motor.eg.a 250kV motor rated at 6.6 Kv will be
smaller in size thanat 3.3KV

Tan delta point in transformer to be earth or not?

1 Answers   DMRC,

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for ac networks if the voltage wave form is V=Vm sinwt here the voltage Vm=230 for the frequency 50hz then the time period is 0.02 sec then for the time period 0.12 sec what is the voltage

4 Answers  

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Is it possible to control the power in transmission lines by remote controlling method?? if yes explain in details???

1 Answers  

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WHAT ARE THE SITE TEST APPLIED ON A SURGE ARRESTORS? DO MEGGER TEST APPLIED ON SURGE ARRESTOR? IF YES THEN WHAT ARE THE ACCEPTED IR VALUE REQUIRED FOR SURGE ARRESTORS FOR VOLTAGE LEVEL 11KV, 33KV, 66KV 132KV, 220KV AND 400KV?

5 Answers  

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what is the principle of generator , induction motor,d.c motor

1 Answers  

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during parallel operation of two ac generator which condition must match before taking both parallel i.e speed /voltage rating /kva/exciation

2 Answers  

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what is conductor constant of raccun conductor

0 Answers   CSPDCL-Chhattisgarh State Power Distribution Company Limited,

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if three phase supply is given to single phase transformer, what will happen?

3 Answers  

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This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers  

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It is used or not HT cable single core 630 sqmm in LT 3 phase capacitor bank which is used in PCC(power control center).

1 Answers  

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what is the contact resistance of Air circuit breaker??

1 Answers  

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what is use of mccb.

1 Answers   Simplex,

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