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Why the starting current in Induction Motor is very high as compared to normal rated current ????
6 Electrical Engineering 16974What will happen if 60 Hz rated transformer is connected to the supply of 50 Hz say 415 V (3-phase) step up to 3.3 kV...?? ?
2 Electrical Engineering 7149why in some cases the receiving end voltage is higher than the sending end voltage in transmission line (called 'Ferranti effect') ????? whts the reason behind tht???
3 Electrical Engineering 7476What is the effect of impedance on the heat losses in case of AC system??? Does heat losses really depends on the impedance or depends only on resistive component only..??
4 Electrical Engineering 5884Why induction motor can not be operated at synchronous speed?? what would happen if it is operated at synchronous speed??
5 Electrical Engineering 25481
Question { 4935 }
defination of loads
Answer
1.STATIC LOAD
- CONSTANT POWER (induction motor, dc motor & such kind
of machines)
- CONSTANT CURRENT ( electronics ckts)
- CONSTANT VOLTAGE (bulb)
2.DYNAMIC LOAD
| Is This Answer Correct ? | 2 Yes | 0 No |
why transformer ratinh is in KVA????/
Answer
depends upon voltage V...So as we can say that the total
losses of the transformer depend upon VA (volt-ampere) and
independent of phase angle between V & I (i.e. pf
angle)...so transformer rating is in kVA & nt in KW...
| Is This Answer Correct ? | 14 Yes | 0 No |
what is the difference between equipment earth and system
earth.
Answer
order to protect the human body from any shock while in
system earth the supply is earth by means of neutral point
usually connected in star manner...
| Is This Answer Correct ? | 13 Yes | 0 No |
Question { 6617 }
what is apparant power and reactive power
Answer
power is consumed by that machine...the total amount of
power consumed by that machine is called APPERANT POWER...
this apperant power is mainly devided into two powers...
1.ACTIVE POWER 2.REACTIVE POWER
active power is tht power that actually utilized and
delivers the output (usually mechanical) is given by that
machine while reactive power is that power which is required
by the machine but which is not useful at all.so apperant
power is the vectorial summation of active & reactive power.
APPERANT POWER= ACTIVE POWER + REACTIVE POWER.(vector sum)
| Is This Answer Correct ? | 6 Yes | 1 No |
