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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,
1883What 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 9623We 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 11959How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?
13809When should I use earth leakage circuit breaker for incomer and when should I use it for each feeder seperately?
1 3796How 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 10587the 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 73401.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.
2044Post New Electrical Engineering Questions
In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem
what is the difference b/w ground & virtual ground?
Can an inverter be used as a converter? How?
what is the difference between torque induced and torque load?compare them with respect to dc motor?
Where can I get CPWD electrical specifications & Shedule of rates? Please help me
what does vector group Dyn11 tell us? also tell me how will u differentiate between phase lead and phase lag thru this vector group
There is air in a room . the top and bottom of the room are at constant temp. T1 and T2. DRAW THE temp profiles if a. T1 greater than T2 b. T1 less than T2
design of IGBT firing circuit for 11KV
I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF
what are the industrail measures to over ferranti effect? how would the ferranti effect the power system if those remedial mearsure arent taken? how often does this effect occurs in real power system?
what is mean by Digital Logic Meter (DLM)
What size cable (based on voltage drop) is required to supply a 40 A three phase boiler if the wiring system is 75V single insulated cables installed in non-metallic rigid conduit 56m from the main switchboard? Voltage drop in the consumer's mains is 8V.
How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?
What is size 00, 01, 1 etc., in HRC fuse types?
which IS or IEC is used for earthing,breakdown voltage of transformer oil, hv/pd testing and all type of electrical testing
