why do motors burn out? I understand why adding parallel loads to a power source means more current moves through the circuit, and can destroy circuit elements by overheating. What about when you have a vaccuum cleaner intake flush against a floor, a room fan sitting directly against a wall, or a power drill trying to drill through something too hard?372
For 300 MW plant what is the distribution voltage6 4337
in alternator what is use of AVR ? how AVR is operating either AC or DC?1 2695
in alternator how we can give power to rotor ? its power is AC or DC ?5 2111
how can u determine size of the conductor by knowing the voltage level2 2488
What will be the output of t/f supplied with DC sourse?2 1609
what is IP55,IP652 5868
what do u mean by starting torque? how it should be for a good motor? what is the relation between starting torque and power factor? What is the relation between efficiency and starting torque?2 1561
please explain me about traction application?2 2762
define differential current and restraining current in relays. how to calculate it by mathematically? post the formulaes.4 19958
why the rating of a transformer in kva not in kw.9 3703
why cu losses called cu losses.5 3107
What is the value of nuetral current in star connected load when DC is supplied to it???1 1384
in dc series motor if field wdg is shorted then
HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U
What are the functions of temperature scanner in power transformer?
what is high - pot test. what's its use?????
What is touch potential and step potential?
in dc suppy frequency is zero why? if dc frequency is zero how to exist dc transients and ac transients
why various test are performed on electrical panels & power cables before commissioning on site & what are these test???
why in motors dc extitaedtion is prefer
how to design step down 12 V, 1mA small transformer from 220 V AC? Because according to VI relation and power transfer it results bulky...
HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS firstname.lastname@example.org
what is the use of expulsition protective gap in 11Kv line.
why we are using in reverse power relay in generator singranizing
current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer
how we can calculate 2 phase welding transformer rating or total power?
formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?