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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,
1799What 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 9398We 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 11612How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?
13716When should I use earth leakage circuit breaker for incomer and when should I use it for each feeder seperately?
1 3646How 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 10348the 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 69771.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.
1933Post New Electrical Engineering Questions
WHAT IS DOL STARTER? HOW IT WORK? GIVE ITS CONTROL AND POWER DIAGRAM .
Why DG set is not installed in Terrace ??
the problem faced on star or delta winding connection??
what is the difference between single ratio, multiple core and multiple ratio, multiple core ? please explain.
How to calculate the no of Ceiling fan (1200mm sweep) per unit area?
What is Negative Potential Bias
WHAT IS VCB SAFETY
how to calulate short circuit current for the following: 1.cable connecting 11KV of 22KV/11KV transformer to 11Kv of 11KV/415V transformer 2.what cable size should i use.
what is fault level of power system ?
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What is the main use of rotary phase converter ?
what is effect of length of air gap on performance of dc motor and generator?
which model T or pie model is prefarable in power syatem
how does the terminal voltage of transmission lines increase when a capacitor is connected???? This happens not only in transmission lines but also in all circuits. How??? When a capacitor is connected in a transmission line, capacitor also takes energy from the same supply. But how is it able to increase the terminal voltage??? Practically What sequence of events happen during increase in voltage???
What are the differences between single phase and three phase?
