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.

1583

how to calculate IR value of 33KV cable ??

1374

what is the role of energy meter in distribution system ?

717

What are the uses of stepper motor?

767

1) Explain why we don't link the two earthing system ht and mv on a pole mounted transformer sub-station.

1329

in Contactor opearation Why there is a difference in the values of the operate and release voltage in case AC supply

1610

Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?

1286

Can anyone explain me about the RLC based Impulse high voltage generator and how to and operation of Series resonant High voltage reactor...?

1467

How to work definite,over pluxing,revers power,OSR relay

1287

234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

1619

How the circuit breaker is selected for Induction motor of 100 kW, 415 volt, 0.85 power factor, 0.95 efficiency ?

1262

What is the vector group of a transformer,how can it be found out?

1607

what is the difference between the characteristics of two different phase bushing of any transformer

1391

how can we make cable shedule for controll wiring ? which details must be required for it.?

1687

When steam condenses and becomes water at the same temperature, the specific heat for the process in kJ/kg k is

692