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 3649We 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 4683HARMONICS ARE ALWAYS IN INTEGER LIKE 2ND OR 3RD HARMONICS,NOT IN FRACTION LIKE 0.5 HARMONICS.....????????
2 3535what is resonance in electrical circuit and its effect? where we get high resonance and low resonance?
1 2540what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?
HAL,
1983E.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 3437Post New Electrical Engineering Questions
I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.
why high speed tripping relay will be used in tripping circuit why not normal relay
what are the dimensions for 200 kva transformer plinth (plateform),in which pcc m20 is used..
In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?
What is stacking factor? What is its approximate value?
how to check ac servo motor
how to electronic energy metter failed in electomagnectic fild passing in the metter and which thing to defect more on metter.
What is the implications when 600 hp motor is started when the unit is running with Transformer of capacity 1500 KVA and DG set of 1000kva
why the colour of insultor stack , petticoat is brown. Is it has some technical reason.
ratings of lightning arrester
design of IGBT firing circuit for 11KV
which one is more efficient, torq, power & ecnomy with the same frame size AC motor / DC motor?
how to calculate distance between busbar supporters for LT panel, what are the factors influencing in this design
How to choose size of the cable w.r.to current carrying capacity ...
quantizer means?
