Answer / prabhakar

By operating the motor over the synchronous speed, the
motor will run as a induction generator

Answer / sidda raghavendra

* For an induction machine:

at the time of starting if we can set the speed of the
machine is just less than its synchronous speed it works as
induction motor as we must give electrical power as input

at the time of starting if we can set the speed of the
machine is just higher than its synchronous speed it works
as induction Genearator as we must give Mechanical
(steam,hydral or diesel and so on) power as input

*For synchonous machine:

Its all depend on only the input of the machine

Answer / balaji

by making slip value negative..

Answer / sujata

motor is a machine which converts electrical energy into
mechanical energy and generator is a machine which converts
mechanical energy into electrial energy.
So this depends on us that how we are using that machine .
if we will provide mechanical energy to its shaft then it
will start generating electrical power and you will call it
generator.
and if you will provide electical supply to it then it will
give mechanical power then you will call it motor

Answer / srinivas

By changing the slip value. The slip value of motor is
greater than 1, then it acts as a generator

Answer / suresh apgenco

BY OPERATING THE INDUCTION MOTOR IN THE LEADING PF, THEN IT
WORKS AS GENERATOR

Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss

0 Answers  

Differentiate between Zero and Negative sequence current

0 Answers  

what is the formular for the calculation of CT'S when installed as part of a electrical installation so the correct meter is used

2 Answers  

WHAT IS THE DIFFERENT BETWEEN MCB & MPCB? & HOW IS USE?

3 Answers   Gandour,

I try to check the three phase voltage in multimeter, in 125A isolator switch incommer. first i touch R phase, and then i touch Y phase using multimeter, the moment i touched, it blasts and that moment i got blindness. multimeter selector position is correct(750V AC MODE AND RED PROBE WASS IN v AND BLACK PROBE WASS IN COM. MODE. COULD ANYBODY GIVE ANSWER FOR THIS TO AVOID FURTHER ACCIDENTS PLEASE?

2 Answers  

A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

0 Answers  

What is the effect of positive feedback on stability of the system?

0 Answers  

what are the needs of electrical earthing.... other than protection?

5 Answers   Eskom,

why active power is called as real power or working component.What is the exact function of active, reactive & apperent power.

3 Answers  

What is static Device & Mechanical device? Is transformer a static device?

5 Answers   ABB, Emco,

what will happen if dc is supplied in acb or mccb or other circuit breakers?

1 Answers  

What Should be the value of Vector Surge angle at Tripping and how to calculate it?

0 Answers