Why 50hz and 60hz frequencies are used by the world, why
they are not taking 55hz?
Answer Posted / saa
RPM of Prime mover is related with Electrical frequency.
Some countries use 50 HZ with 1500 Rpm for 4 pole
Some countries use 60 Hz with 1800 Rpm for 4 pole
for 55 Hz 4 pole RPM of Prime mover will be 1650
Some countries use 50 HZ with 1000 Rpm for 6 pole
Some countries use 60 Hz with 1200 Rpm for 6 pole
for 55 Hz 6 pole RPM of Prime mover will be 1100
Itz just matter of Choice.
Is This Answer Correct ? | 22 Yes | 2 No |
Post New Answer View All Answers
show the single line diagram of star delta starter with single phase preventer
state the working principle of incondenscent tube?
Define liftable weight of a transformer? Does the total weight of transformer include oil weight?
Compare salient pole and cylindrical rotor machines.
What is the reason for using a GE G101 MCB in place of an EP102 MCB if both are capable of AC circuit protection?
1- What is the Polarization Index number be good for 15KV 3c#500MCM electrical cable? 2- Can I use the IEEE Std 43-2000 to perfom the PI test? Thanks
How delta connection in the primary of distribution transformer reduces harmonics?how delta connections reduces harmonics?Please answer me...Hope that question is correct.
draw the restricted earth fault protection circuit install on power transformer and identify its parameters and draw C/C curve of it
how to apply b license to c license in tneb
where we use the SFU & FSU?
temp of cast resin 1500kva tx formerwent up to 138.c but came down very fast to about 100.c within 20 mins when load was reduced from 70% to 60%
any one guide me to reduce the power factor of diesel Generator from 0.97 Leg to 0.8 Leg.with out any change in my load.
What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?
what is the acceptable limit value for Desolve Gas Analysis/
what is the use of vcb & isolator in substation?