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HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES? WHAT IS THE BASIC TECHNIQ OR FUNDA USED BEHIND THIS ? SPECIALLY EXPLAIN?IMPEDANCE METHOD.
ABB,
2 7293dear all, in motor operation , motor is of 100 hp and bimetal relay setting is 130 amp, if relay is getting tripped on 120 amp balance current what can be the reason? Relay is newly replaced. I dont know but is there any frequency effect in thit case? Can frequency variation affect bimetal relay operation?
1 3711WHEN THESE TRANSFORMERS WINDINS CONFIGURATION ARE USED? SPECIALLY EXPLAIN REGARDING STEP UP AND STEP DOWN KEEPING IN MIND.AND REGARDING LOAD ALSO. a.star to delta b.delta to star c.delta to delta d.star to star ALSO EXPLAIN WHY V USE 415/415 TRANSFORMERS IN TUBEWELLS?
ABB,
1 3997.if the vector group of two transformers is not same n tey r connected in parallel operation then what will happen?
ABB,
2 6211PLZ EXPLIN ABOUT CLASS PS CLASS CT .WHY THEY R DESINED AND FOR WHAT PURPOSE?WHY OTHER CT CANT BE USED AS PS CLASS CT? EXPLAIN IN SIMPLE LAUNGAGE IF POSSIBLE PLZ GIVE CIRCIT DIAGRAM?EMAIL-RAJ_SINGH_0376@SIFY.COM
ABB,
2271what is meant by trip circuit supervision & directional or non directional over current ?
ABB,
1 5752
hii.plz send me hpcl placement papers for officers trainees for graduate engg plz my email id is ajm_knit@yahoo.com
why the neutral point in connnection oscillates?
"In refrigeration, why during operations is running low pressure at the suction side?"
1. If 8.35%Z means the percentage impedance of 132kV-line from power company, we will like to confirm its base capacity?
What is the difference b/w fanuc alpha series 16i and 18i controller. what is stand for i
Reason for capillary type dp level transmitter fluctuation
What are demand of crotonaldehyde99% in the worldand its international market ?
lorteny method
What is the constant voltage unit?
Why space heater is required for each verical bus bar chamber? if one space heater is adequate or not for anti condensation?
In a Furnace arch pressure is more than Hearth pressure,then how flue gas travels to stack
What is the working principle of MIG welding? and its out put Voltage?
Did RMU have ct and pt ?
why is the diffusion technique of formation of resistor most widely used?
how a spindle motor works , in detail..............
