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if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer
1853what is the minimum recommended leakage current of an earthed cable connected to the body or skid of an alternator
2006there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit
1881how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc
2 7695What is magneto on a gas generator. how it functions. its out put is d.c or a.c. how it can be checked for correct functioning
1882What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?
1859if i have 5kw,9A,three phase induction motor,if i want to install it 100 meter away from its feeder,how i will culculate cable size for this load.
2 5306in a refinery one motor is suddenly stoped. what will do how can i findout the problem explain step by step
2 4430the cheapest inducting instrument among all is a)pmmc b)moving iron c)electrodynamometer d)rectifier
2 5859why do we use bundle conductors instead of using single conductor of larger size for high voltage transmission?
7 21540in a refinery one motor is suddenly stoped. what will do how can i findout the problem explain step by step
2 4490what is the value will come when megger the phase to phase ,phase to neutral ,phasae to ground ?
3 20534Post New Electrical Engineering Questions
static chagre
66kv under ground cable how to layaing in ground any special case two ckt r runing
Why MCCB is Getting tripped sometimes when there is no load in the Midnight ?
Proviiding the Dedicated N earth and individual Body Earths ,Finally these all looped /Now my Question :- will it not harm in case of Transformer Fault current flows in Dediacted N Earthing to Looped Body Earthing.
What is excitation in case of dc motor?
Is it possible to operate a synchronous 2-poles turbogenerator with a still-in-place faulted bar but electrically disconnected ???? If yes, should I act on the other phases as well ???
What test must you do before powering up a circuit that you have been working on?
what is method for testing CT
Why a tesa lamp is glow between two phase?
what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW
1.What is the range of stator resistance of 3-phase induction motor? 2.Two electrically operated vibro motors are foxed in parallel direction in vibrating feeders. what is the direction of both vibro motors?
1hp= how much rpm
What is the principle of HIGH SPEED DIRECT DRIVE MOTOR ?
Please define ohm’s law for a.c (alternating current)?
If the feeder rating is 7.5 kw or 10 HP star-delta feeder, MCCB is taken as 63 a, contactors-32 a, how much will be the OLR rating or which range OLR should be considered when we concern about type-2 coordination?
