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How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?
HAL,
1790What is the min.& max distance between two earth spikes is required for measuring earth resistance of an earth pit? Is the manufacturer of Earth tester decides this? Pls explain.
3 9383We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?
5 11594How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?
13708When should I use earth leakage circuit breaker for incomer and when should I use it for each feeder seperately?
1 3627How can I communicate with an Areva MiCOM P121 relay by RS485 port? In other word, which command can I send and what information can I have recieved? please send some refrences, please. thanks
3 10323the distance from my office to d.g is aprox 400mtrs and voltage drops ibn my office near about 40 volt what should i do p[ls suggest.
6 69541.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.
1923Post New Electrical Engineering Questions
3Cx240 & 3Cx300 sqmm Al. cable from lv side. What is the calculation for this cable??
Is it required to lay GI wires along with GI/MS conduits from one point to another point though separate earthing cable is conncted from DB to Socket?
Why the unit sizes of hydro generating machines are not standardized as in case of thermal powerplants?
What is the best thing to protect the motor from running over full current. CT or O/L or pressure transducer at the given pressure rating
What is meant by derating factor?
What aturn on methods of scr?
Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?
what is the difference between interconnection and intraconnections in the circuit diagrams
how i calculate the syncrones generator NGR resistance .if we have a 6mw generator line voltage of generator 11kv also line current 393.3 ampere.
How to check the Bushings of the transformer?
What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?
relation between power station capacity and voltage level?
what will be the min and max voltage flow from neutral to earth?
how we test a 3 phase motor on single phase supply....? HOW WE RUN A 3 PHASE MOTOR ON SNIGLE PHASE. supply for testing..? how we verify of a 3 phase motors 6 wire & name thame a1/a2/a3..b1/b2/b3 and c1/c2/c3 for connecting star delta starter ........i have only 1 phase supply ? help forum..........
Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)
