How would we calculate the no of earthing pits required
for motor /panel
Answer Posted / babloo
the no.of earth pits is usually calculated considering the
fault current, for suppose if the short ckt occurs b/w the
2 phases the fault current will be 3times to the normal
current. For example A 55KW motor carrying the current of
80A during normal running , when the short ckt occurs the
fault current has to dissipate through the earth, so the
earth must be around 25 X 3mm strip.
Is This Answer Correct ? | 2 Yes | 2 No |
Post New Answer View All Answers
Why the efficiency of a three-phase induction is the motor is less than that of a three-phase transformer?
what happened when we supply a dc current in dc motor?? can it worked properly?
when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?
How is magnetic leakage reduced?
how to increase senstivity of ct
how to size H.T & L.T Panel ?
why 5kW motor becomes unbalance if its relay trip 1st time and its set value is 7.0 A
how is the magnetic current test is different in delta-star and delta delta transformer.
What is power relay?
what are the breakdown voltage rating of mini- curcuit'transfarmer!
HOW TO CALCULATE HV TEST VOLTAGE FOR ELECTRICAL EQPT.
A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.
I HAVE A 50A MCCB AS PER DESIGN LINE WIRE CONNECT UPWORD SIDE AND LOAD IS CONNECTED TO DOWNWARD SIDE TO THE MCCB.IF NOW ANY ONE CHANGE SUPPLY & LOAD(WISEVERSA) WHAT HAPPENS ? DOES MCCB OPERATION OR WORKING FUNCTION NORMAL IF YES THAN WHY THERE ARE MARKED LINE & LOAD ON MCCB.
How LT megger works ?
what is PDU in transformer?? which company manufacture??