what is need of air gap in expansion section in busbar?
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If we want to change a contactor of faulty one what are the conditions want to fullfil
why dc is used in control circuits for MV & LV switchgeras instead of ac
what is the stear deltaprinceple?
how could we know the size of cable by physical view?
I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id:upendrakrishna20@gmail.com,plz send me ,or send any other rrb papers plzzzzzzzzzzzzzzzzzz
A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.
orifice sizing how done, checking & selection
What is the most essential condition for the voltage build up for a d.c. Shunt generator?
with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen
why moisture formation found in XLPE Armoured cable outer sheath
in control scheme dc logic wiring commonly using negative loop,what is the reason?if we use positive looping what will happen?
comparision between ACB and VCB
why EMF IS INDUCED IN A CONDUCTOR WHEN FLUX LINKING WITH IT CHANGES ACCORDING TO FARADAYS LAW.
if 3400kw slipring motor rotor shorting done and motor started on mv drive ,what will be the rotor shoring current
how to calculate mf when meter and cTPT detail are given
