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if 40 watt bulb has higher resistance then a 100watt bulb then according to joul farmula p=I^2R the 40 watt bulb more power consume then 100 watt bulb.
5 13974Simultaneous trip of incoming and outgoing breakers of 400kv/220kv trnasformer. What are the probable causes?
2 4749How much KVAr bank reqired for 630 KVA transformer on full load for maintain power factor upto.99
4 17957Post New Electrical Engineering Questions
A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.
What is dynamo?How it works and what is the function of dynamo in a DG.
What are the parts in a inverter?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
what is mean by Digital Logic Meter (DLM)
Would you recommend to replace all oil filled cables with xlpe cable for hv transmission with the current technolgy for xlpe cable?
In EHV transmission line a neutral grounding reactor is often placed at neutral point of shunt reactors. What is the recommended protection for this neutral grounding reactor? Should I use a fast closing switch to bypass neutral grounding reactor when this protection operates?
Pls tell me whether we can use EN3A material for shafts of Permanent magnet alternator.What will be the effect of magnetic and nonmagnetic material for shafts on magnetic properties of PM rotor .
What are the basic elements used for modeling mechanical rotational system?
why we need to us lenz's law for synchornous motor
what is Different between Bilinear and Unilenier?
List of equipments required foe industrial repair lab.
What is the minimum IR value of HT/ LT cable? Pls post separetely!!!!!
what is mean by descripiency relay? & wht is its ansi code?
Why power genaration in India is at 50HZ while America its 60HZ
