Explain Buccholz relay in detail.5 4945
What are interpoles and commutation windings?Why r they used?1 2844
What is rotor angle stability?2 14589
What is current chopping in CB?1 16996
where the protection CT in neutral of transformer be located, before bifurcation or after bifurcation and why.2 6621
how can we change the polarity of Alternating current rapidly? how frequency of ac can be controlled and changed easily?1154
What should be the DC voltage for Hi-pot test on 11kv switchgear3 7686
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.???
how we can check the CT & VT?2 4108
what is mean by xlpe cables?3 3969
WHAT SHOULD BE THE RATING OF MCCB FOR 415V,3Ph,50KVAR CAPACITOR BANK1 4407
why maintenance batteries used in DG sets not in MAintenance free Batteries.4 9259
What is the effect of solar radiation on the design of an Isolated Phase Busduct?
diff b/w elcb and rccb
What are motor generator sets and explain the different ways the motor generator set can be used ?
formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?
Define the three phase formula fuse.
How to select the proper VSD to operate high inertial load
what are the major & minor faults that occur in an inverter and in UPS ? And how to repair and resolve them ?
how will we calculate the copper wire load..
We have 110Vac ,10A ac supply which is converted into 110VDC & How much DC current? which factor is reqired for dc current calulation?
area control error
What is CCM in Electrical ? where can we use this material?
Define the overload capacity of the motor?
What will happen if a dc source is given to a tubelight. Will it work or wont it work....
Why HT 11 KV Slipring Motors are connected in star ?
from which subjects most of the technical que will b asked for hpcl(electrical).pls help me