oil sample dielectric test gives the insulation rupture voltage at 26 kv. is this transformer safe to be operated . The working voltage is 11 kv
2 3682We have one 500KVA transformer. We have tested REF relay and commissioned. After one and half year, due to some ground fault in one of the DB circuit Transformer tripped by REF relay. What will be cause and remedy. Please advise?
1 4709HARMONICS ARE ALWAYS IN INTEGER LIKE 2ND OR 3RD HARMONICS,NOT IN FRACTION LIKE 0.5 HARMONICS.....????????
2 3561what is resonance in electrical circuit and its effect? where we get high resonance and low resonance?
1 2586what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?
HAL,
1998E.B sending end to receiving end 33kv ug cable laid 8Km,receiving end to ss1,ss2,ss3,ss4 all are Approx 800 Mtr,can go for 33KV to 430V or 33kv to 11kv in receiving end and 11kv to 430 near ss ,which one is good for technically and economically.
JLL,
1 3476Post New Electrical Engineering Questions
please send me jindal previous aptitude and technical question and answer.my email id is deep_raj@live.com
As we know diode work on both negative and positive but converting ac into DC we have to given a/c from negative of diode or positive side.please give me answer.
HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U
what is kvarh? Please define it With calculation General motors ?
How to design pavement quality concrete by using C.R.C.P Method
What is the maximum operating temperature for a thermoplastic insulated cable?
where the lexical paramater will use in fron end?
What is the difference between hot and cold loop testing?
what are the analog quality input for protection function?what are minimum reqiments?
If Neutral Grounding Resistor (GR) failed/shorted. Is it repairable.
In Indian Household, generally we receive 220V AC single phase supply. But AC has 2 phases, +ve & -ve. So in +ve half cycle current is flowing...so what happens in the -ve half cycle?? Please illustrate.
why does the magnetic balance tests at transformer?
use of PIR in ehv breaker
If short circuit ratio is high is it bad or good for a machine then tell the reason...
why swinburnes test cannot be performed on series machines?explain
