Interested to Buy Any Domain ? << Click Here >> for more details...
Why is it that variation allowed in supply voltage to
motors is (+ or -)10 %, whereas that in frequency is (+ or -
)5 %
- 3 Answers
- 6743 Views
- I also Faced
- E-Mail Answers
Answer Posted / gajendran.al
Variation in supply voltage to motor affects the torque
produced by the motor and is not affected much with +/- 10%
whereas variation in frequency affects the speed of the
motor. Even 1Hz variation could vary speed by 30 rpm for a
4 pole motor. So variation in frequency is not advisable in
motor
Pl note that increase in supply frequency makes the motor
rotate above rated speed which may cause mechanical failure
of motor.
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
how to decide no of electrodes for 1600A LT Main incomer panel
how to select electrical equipment such as fuse,dg,transformer,motor,msb,wire,cable as per the connecting load..please mention any books to design,take licence
What is meant by vector group
the winding of Generator and Motor is star or in delta ? and why
Define availability (operational)?
sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me
What is the main cause of magnetism?
What is the use of lag compensator?
we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?
DG SET BLOCK DIGRAM
Merits & Demarits of Oil circuit & Air circuit breakers ?
State The Difference Between Generator And Alternator?
explain different types of d.c motors?
why we testing the core balance of the transformer before comissioning?
Why the magneti fields are not passes from southpole to north pole
