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.
63675 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?
3239Post New Electrical Engineering Questions
Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha
How to decide no. of Step and Kvar for APFC Panel 40 kvar MD: 33.12 KVA Avg pf : 0.8540
what is the IPC ? & what the uses ?
what is meant by neutral compensation factor and where it is used
what is mean by descripiency relay? & wht is its ansi code?
Is it required to lay 2 runs of GI wires along with armoured cables from one power DB to another Power DB?
Why is back emf used for a DC motor? Highlight its significance.
Draw a circuit diagram in which if button is open we can use socket and bulb as a series test circit and if button is close than simple we can use socket as any load purpose.
why core is useful for a transformer ?and also in its operation ?
what is the purpose of high speed earth switch in gas insulated substat
What is the diffrence (Technical & Construction ) between CBCT & Normal CT?
difference between power surge and switching transient
how can i get the formula to find out the cable size if i know the load of main fuse protection.
is it possible for different brand of H.V transformers to run or operate in parallel to each other? if so how much disturbance can this affact the H.V bus bar?
what is the maximum temperature rating of a thhn insulated conductor?