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Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............
1772I have a table fan of Rallifan Make. When I overhauled it I found a stator winding and an aluminum die cast rotor. So it is supposed that it is a 1 phase induction motor. But there are only two terminals coming out and there is no capacitor. Can any one tell how this motor works? or which type of this motor is?
1 4189On the secondary side of a distribution transformer, we use 1c x 630 sq mm cable. Why dont we use 4 core cables instead of 1 core cables on the secondary. Why we use aluminium cable glands on the outgoing instead of brass cable glands?
2 10895Can we use BS 6651 and BS EN 62305 standards for computer room lightning ptotection in substation?
2206Why we transmit the power at the voltage in the multiple of 11 or 1.1 like 11kv, 22kv, 66kv, 132kv...... some one told me that it is due to fomr factor 1.1 of sine wave. its fine but while transforming we can choose any voltage, so why only multiple of 1.1 there also.......? plz tell me.
7 7517avr is an automayic voltage regulator ... it regulates voltage before it synchronise with grid after synchronisation it regulates power factor why....
7 8858how to calculate the current carrying capacity of a conductor. How it is related to diameter of cable or conductor
3 14354How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?
BARC,
1924where is the need for short circuit test for 3 see is required and why? can you explain in brief with application
1918I want to know in body earthing which material can be use either copper plate or GI plate please guide us which is best option.
3 5025Post New Electrical Engineering Questions
What happens if we connect a single phase energy meter in reverse polarity.
What is signal flow graph?
Difference between control junction box (cjb) and power junction box(pjb)?
what is the formula for hv test for cable and circuit breaker..????
what shall be no load voltage of 132/33 kV transformer ? is it 33 kv of 34.5 kV
I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?
What safety precaution are to be taken for avoiding electric hazards ?
Under wat condition statcom operates as an inductor for the transmission line?
Explain difference between stand by earth fault and residual earth fault protection?
explain working principle of earth leakage relay
detailed procedure how we calculate cost for pcc m10 and rcc m20 including centering and labour excluding steel/ iron
Why does the adjacent zone of protection overlap?
How to calculate capacitor bank size at a load 800kVA.
how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?
What is value of earth resistance required for substation and equipment earthing and what are the reference guidelines
