Why HT 11 KV Slipring Motors are connected in star ?
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What are the basic elements used for modeling mechanical rotational system?
How the PF control while running DG set with load
1.what type of wave is produced from i.online ups ii.offline ups iii.inverter.why don't we use inverter instant of offline ups for computer,what's the reason?
how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage.
WHAT IS MEANT BY EMBEDED SYSTEM?CAN WE CALL PLC AS EMBEDED SYSTEM?
I have a shop heater with a 1/3 hp capacitor start, induction motor driving the fan. Intermittently, the fan motor speeds up significantly for several seconds (15-60 sec) then slows to normal operating speed. The manufacturer suggested changing the capacitor which made no sense, but I did it to no avail. Could this possibly be caused by the centrifugal switch intermittently reconnecting the start winding?
Utility company give the supply to customer in KVA but bill them for Watt.why?
what is diffential relay? testing proceure?and transformer reach Over load thet time differencilal relay operate or not ?
how the rotating magnetic fieldis produced in induction machines??? give the correct explanation.is there any mathematical expression for the same?
How to control motor gearbox speed and friquency? If length of cable and dia given, how to measure the voltage drop?
what is the effect of power factor in electrical circuit ? if we mainten power factor near about unity (0.999) our energy consumption Units increase or decrease?
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what is the thumb rule or formula for cable size and current ratings