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L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.
103875 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?
3671Post New Electrical Engineering Questions
how we calculate the withstansing current capacity of wires&cables?
Name the types of motors used in vacuum cleaners, phonographic appliances, vending machines,refrigerators, rolling mills, lathes, power factor improvement and cranes.
What is the form name of 'c' license, I want to download in web
Which device of PlC does share load between DG sets when DG are running in perallel?
How phase to phase voltage comes 440V.
A 3 phase transformer's (Y-Y) Y and B phase is (Y and B connection not broken) broken from neutral and R and Nutral connection is ok, what will be the relay tripping and why
How earthing/grounding done in aeroplanes and ships.
Two electric lamps 40 W, 220 V each are connected in series across 220 V. What is the power consumed by the connection?
What are IR values and what it should be for coil and for insulator
i am studying in final year can i allowed for 23rd UES of Indian army
I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?
In the Variable Voltage Variable Frequency Drive, how the Voltage and Frequency varied ? Is it varied in the Inverter part of the Drive ? Please give us supporting document if any.
Briefly define and explain the following different types of Pulse Amplitude Modulation (PAM) with some examples. i) 2-PAM ii) 4-PAM iii) 8-PAM iv) 16-PAM v) Quadrature Amplitude Modulation (QAM)
how we can calculate chiller required ampear?
what is arc flash and what are the hazards involved
