Why the Substaions are labled as 11KV/33KV or 66/11KV etc instead of label with the POWER TRANSFORMERS Rating (In MVA/KVA)?
Latest Answer: All electrical equipments operated depend on voltage.In substations we can
get same ratio transformers with various power ratings.Ex:400/200KV with 800MVA 315 MVAPower ratings
are depend on load.If we have small rating TR ...
How is UPF Wattmeter different from LPF Wattmeter?
Latest Answer: The UPF wattmeter is used to measure the power with better power factor. the LPF wattmeter is used to measure the power with lower power factor(
Why do we use phase shifting at Current Transformer?
Latest Answer: We use phase shifting in current transformer to transfer the magnetic flux density around the core ...
What is dynamic time of a numerical or electromagnetic relay?
In a three phase system three wires are of colour red, yellow and blue are used to discriminate each phase. Now how will you identify each phase wire without knowing the colour and without any pre information?
Latest Answer: In a three phase system, the phase sequence is important. This sequence will be identified by using phase sequence indicator ...
If we connect a voltmeter between earth and ground wire, how much it will measure?
Latest Answer: Since the earth and ground wires are at same potential there will be no potential displayed in the voltmeter,But on the contrary volts may be displayed between the NEUTRAL and the ground/earth wire. ...
Location of lighting arrestor should be near transformer or not? Why?
Latest Answer: yes it must be near to the transformer,because when there is a lightening occurs the total power must go through Lightening Arrestor to ground with out damaging the transformer. ...
Why the transmitted voltage is multiple of 11 like 11, 22, 33, 132 etc? Is their any technical reason for that?
Latest Answer: No there is no technical reason. It may be the historical reason. But I've seen in a book that power generation start from England & they believe "11" number as a danger number (Example: David shepard, ...
Why the Voltage rises when Leading Power Factor is occurs?
Latest Answer: When there is a case of leading power factor, that means synchronous generator works in over
excitation mode, reactive power will be generated, and as we know that change in voltage is directly proportional to the reactive power so there is an increase ...
What purpose does an earth serve on a generator terminals if the generator was started accidentally.This a true incident when the generator was started it blew the earth wire because the terminals were
Latest Answer: Both are same.Grounding used in USA,Earthing in Britain... ...
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