what is differance between PT-100 and thermocouple?1 6545
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..............942
I 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 2697
On 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 8078
Can we use BS 6651 and BS EN 62305 standards for computer room lightning ptotection in substation?1232
Why 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 4036
avr is an automayic voltage regulator ... it regulates voltage before it synchronise with grid after synchronisation it regulates power factor why....7 5069
Do we really need wheels for the transformer1 1946
Is motor current is dependent on load.2 2690
how to calculate the current carrying capacity of a conductor. How it is related to diameter of cable or conductor3 10891
How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?
where is the need for short circuit test for 3 see is required and why? can you explain in brief with application966
I 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 2712
How to select HT/MV cable size ?
how to define tell me about self
Why to keep capacitor bank off while generator running.
distribution is maximum done by a)radial b)network c) parallel d)b & c
How to select the cable and voltage drop in circuit?
Explain the purpose of inductor in an electric circuit?
Explain the working of any one cutting machine
how to calculate transformer turn primary & secondary side 11kv to 420v
In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?
If I want to buy a new Xformer for my plant what are the main parameter will I need to check?
difference between a diode and thyristor?
how to measure earth resistance of a substation
how do we calculate length of starting time and repeated starting of a direct online starter?
how to Select Lighting arrester? What r the parameters to be considered for the selection of Lighting arrester ?
we need a ntpc previous papers