What should be the overcurrent, instantaneous overcurrent, short cicuit
current settings (i.e. how many times of motor full load and what is the time
duration) for a motor?
Answer / harit
Overcurrent setting should be 120% of the Full Load Current of motor (time setting should be as per the recommendation of the manufacturer or Load characteristic)
instantaneous overcurrent & short circuit current settings should be 7 to 8 times of the full load current. Time interval to trip : should be set at zero (instantaneous).
|Is This Answer Correct ?||0 Yes||0 No|
describe the Operation of induction generators from bus bars
can we run a motor rated 50Hz,415vac,1440RPM At higher speed then rated on name plate with the help of VFD /drive on long term basis.wheater it will effect the motor life
what is the work of trip circuit supervision relay?
what is the basic principle of the alternator ????
what is meant by power and distribution transformer ?
Where I can get the sample question for post of Junior engineer electrical-II For RRB Bhubaneswar.
why phase to phase voltage are 290 rather then 440?
Definition of grid?
How voltage regulation is calculated for over head transmission line? What do we mean by Conductor constant while calculating voltage regulation? how it is differ for for diffrent type of conductor say AAAC DOG & AAAC RACOON conductor?
Why we are mention U1, V1, and W1 in primary side of transformer give technical reason
how can we avoid magnetostriction in transformer?describe the suitable methods.
What is the differance between transformer neutral solidly earthed and transformer neutral earthed through resistor?