What is the diameter of electromagnetic field around a 11000/415v transformer ? Dose it affect people who live 3-4 meter beside it?1110
Why 50hz and 60hz frequencies are used by the world, why they are not taking 55hz?3 5930
what will be the magnetizing current in the testing of 27 MVA transformer?1 3156
when we start the tube light, then it takes initially 1100 volt, after glow it takes 120 volt?(when we give 220 volt a.c.)3 3928
how many testing is necessary for 27 MVA transformer?1 1139
why does the time taken for fuse to melt is longer as the wire length increases?1 2309
PLEASE INFORM ABOUT THE IDEAL TEST RESULTS OF MAGNETIC BALANCE TEST OF TRANSFORMER 33/11 kv DELTA-STAR T/F1314
what is meant by phase &line voltage, how its differ from each other ?5 9444
what is synchronizing panel & its working.3 6109
One of our gas turbine generator unit "1st stage rotor ground fault" alarm was occured several times. we tried to measure some voltage vulue ground fault protection relay (UNS3020a made by ABB and we measured the value of: Ground: 0.9VDC 5V: 5.8VDC 24V: 23VDC u+: 300 – 350mVAC Rf1: 17.5mVAC Rf2: 17.6mVAC The unit still running and the alarm was reset. As of 6pm yesterday and unitl now no alarm happened again. I our protection relay was defective?1 2961
Is a DC Transformer Possible? if Yes, Then Why, if not Then Why?9 12820
when meggering a 3ph,480v oil reservoir heater on a regen gas compressor, why do I get a reading to ground when meggering phase to ground? shouldn't it read opened or is there something that makes it read closed? on the same heater, when ohming, it reads open. thanx1 3910
what is meant by vector group in transformers? wy we r using that?1 3426
What is genrally the % Impedance of a Dg set? How can we calculate Earthing conductor size for a DG set?
What are :- AC Distribution Board (Single & Double Front) DC Distribution Boards Distribution Board LT Breaker Panel.
HOW TO DESIGN THE body EARTH cable(Copper Conductor) size for 60KVA UPS?
can we use CBCT in neutral of solidly grounded transformer? in place of three phases we can pass only one phase which decreases the size of CBCT?
is it value of power factor is more than unit. whats effects in the source supply
why we permissive overreach in distance protection.where it is applicable to use in long r short lines
what is conductor constant of raccun conductor
Inductor and capacitor........power in one phase and ...... in it another phase.
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how to calculate the power factor when instantaneous voltage and current has harmonics in it ?
1.what is meaning of curve into a mcb. 2.what is basic reason changing of curve
Help need in transformer !? Hello Friends The parameters of 2300/230 v 50hz t/f is R1=0.286 ohm R`2=0.319 ohm Rc=240 ohm X1=0.73 ohm X`2=0.73 ohm Xm=49.2 ohm Secondary Load impedance ZL=0.387+J0.29 solve the exact equivalent circuit with normal voltage across primery.. I know every thing but i cant find CURRENT I1=? and I`2=? Please help me give solution or only Formula please please...
How to findout raw or ups power? its not indicated in socket,
please send me the L&T Emb. sys. placement papers and entire details of pattren
what will happen reduce the transformer voltage from 415v to 406v, is it save the energy,? are this methodis good to reduce the energy.?