what is the clear formula to calculate cable size for a load

1937

Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.

1973

state working of halogen lamp?

1783

when 20hp 3 phase motor start no load condition in star or delta connection.find current and write formula.(tariq)

2028

In EDO ACBs what is a purpose of closing coil and motor, what is the operation of these devices are they inetconnected. means if we give supply to motor and by BCS we charge Closing coil,what exact is operation is and how it charge a spring of ACB. Sir if anybody has an wiring diagram please send me the link to operate and EDO breaker.

2110

How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

2033

What is the settings of distance protection relay in 400 kv line

1629

how the inner and outer body is separated in aircrafts?

1048

What are the advantages of stationary armature and rotating field system?

1171

Why are short circuit ratings always 16kA,25kA,36kA and 50kA.Who has fixed these?

4232

How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?

13719

What is diversity factor in electric installations?

1135

I am a electrical engg. diploma holder,applied for junior engineer (electrical),Kolkata RRB. Have I to attend all electrical,mechanical&civil portion in written exam.???

15586

what is the formula of starting current of 3phase and 1 phase motor???

2032

why does a dc machine has high efficiency while working as a generator than as a motor ..

1959