Answer Posted / kk_london
my dear frend sajid, sf6 cb needs more attention than abcb
and vcb because they hardly need any maintenance.
| Is This Answer Correct ? | 8 Yes | 4 No |
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sir i have cleared the apti test of EIL held on 15th march and my interview will be in new delhi on 2nd june.i will be very much helpful if u help me regarding the type of interview questions comes at EIL.(URGENT.........PLZZZZZZZZZZ...............)
What is the difference between isolators and electrical circuit breakers? What is bus-bar?
why we permissive overreach in distance protection.where it is applicable to use in long r short lines
in control panel, how can i measuring the distance between one bus bar to another bus bar. then now only for bus bar. in mpcb and contactor also. that means one mpcb to another mpcb how much distance? how can i calculate that.
Why reactive power is needed in a power system? How is it being absorbed or delivered by alternators? For reactive power control we are changing excitation but reactive power absorbing or delivering related to stator. How these two are interlinked? i want a detailed explanation with necessary expressions and figures?
what is invertor supply and raw powersupply
there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit
what is the voltage regulation for unity and zero power factor?
WHAT IS MEANT BY DERATING OF THYRISTOR?
What is nyquist contour?
Define rise time.
what should be correct gas pressures to be a 1.5 ac unite
What are the essential characteristics of signal flow graphs?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
mccb service sittings be done?
