why do we use magnetic contactors ?circuit breakers are not
enough?
Answer Posted / alok
magnatid contactor are use as aux. contact not for main arc
quanching chamber & medium so contector use in controll
ckt. not in power ckt.
| Is This Answer Correct ? | 0 Yes | 14 No |
Post New Answer View All Answers
why use phase displacement in transformer.and effect of phase displacement on transformer
3phase cable calculation formula by motor load
HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT-SWITCH BOARD,MLDB,ACB,BUSBAR,ETC,......?
How to measure power in 2 or 4 or n phase circuit? Please give me a formula.
What can you contribute to the progress of our Company as an employee if you are selected?
why high speed tripping relay will be used in tripping circuit why not normal relay
which capacity of RCCB used for five thousand watt electricity load?
what do you mean by plant earthing system.
We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?
If I want to lift the water at a height 50m from ground level through two inch(diameter) metal pipe then what is the capacity of motor pump is required? is it possible in single phase supply or not?
Show Details FROM:Muhammed Ikram TO:qa@allinterview.com Message flagged Saturday, June 4, 2011 10:07 PMMessage bodyHello all, i want to ask a question to all of you that what is VMM (voltage monitoring module )? how it work,s? i heard somewhere that it compare 1 phase voltage to other phase voltage. but there is also some setting on it. how to set it,s setting. please tell me briefly. Thank,s and Regard,s. Muhammed Ikram.
How many VSC based HVDC are there in India and the world
description about dry type transformers
what is the use of current transformer in power transformer secondary side.?its connectyed in WTI
What type of pipe material G.I or M.S is used for sprinkler system?