Why the rating of the HT breakers are in 1250 Amp, while
the load on the breaker is around 50 Amp. ?
Answer Posted / sbb
It is because we cannot measure the high current directly.So
for this we will keep CT's to measure high currents.In
primary side it will be 1250A and in secondary side it will
be 50A,this is nothing but CT Ratio.
| Is This Answer Correct ? | 1 Yes | 16 No |
Post New Answer View All Answers
why current is constant on d.c?
why tertiary winding is used in transformer with diagram?
why r we using shell transformer for low voltage
How to calculate the current of Highpressure Mercury Vapour Lamp?what is the basis?whether we have to consider power factor or not?
What is the difference between acs 550 & acs 850
why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?
Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?
How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?
what is the advantages og idmt relay over magnetic relay??
what type of motor used to move a 1 ton gate? and relate ratings with load.
how to find out 3 phase complex power in per unit in unbalanced system?
How to calculate the fuel consumption for 600kva DG genset which connecting with 25%load?
how i calculate the syncrones generator NGR resistance .if we have a 6mw generator line voltage of generator 11kv also line current 393.3 ampere.
how to calculate current carring capacity of cable and cable selection? 1) copper flexible cable 2) copper armoured cable 3) Aluminium cable
IN electrical field, WHAT ALL THINGS THE CUSTOMER WILL ASK WHILE ORDERING FOR LT PANEL (ALL TYPES OF LOW TENSION PANEL)