why a pilot exciter is used in combination with the main exciter? why not only a main exciter is used for excitation to an alternator?
1 3598If NO contact of relay gets supply from other sources or other part of circuit and at a time relay coil activates,then current will flow in which direction & will it cause to damage relay??
1 1875Post New Electrical Engineering Questions
how the B-H loop obtain under the static condition
ratings of lightning arrester
Is it possible to obtain 480v or 550v in single phase output by giving the input to 230v to a single phase torodial type transformer without using a stepup transformer?
When a single pase capacitor run motor- run on 230vac and Case(1)run with 8 Mfd 250 vac.capacitor , Case( 2) run with 8 Mfd 400vac capacitor. What is difference between both case regarding power ,efficiency etc?
While HT line put on to activate ACB in low tention panel VCB tripping instantly.why it happens
What is conventional thermal current (Ith)
1. What is the exact formula for one weber? for example,(one ampere = one coulomb electron of electrons crossing a point of conductor at one second. i.e, 1A=1Q/1sec)
Dear Mr B C pal...Can you plz. put some light on principle of operation of Z-Ct in conjunction to its use with 1Cx1000Sqmm HT Cables & Directional Ground Fault / Over Voltage Relays...Regd..Parag v K 9899115632
describe the Tranformer testing procedure
why we use 630mm single core cable for transformer secondary side and why two neutral cable
The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is
Salient pole alternator is more stable, why?
Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.
Installation method of self treated earth electrode.
If I want to lift the water at a height 50m from ground level through two inch(diameter) metal pipe then what is the capacity of motor pump is required? is it possible in single phase supply or not?
