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what is the std. earthing resistance for 440V system or m/c, 33000/440 Volt substation? What is the std.?
2 6789LET ME NOW MORE ABOUT icu and ics for circuit breaker. how we calculate the rating of circuit breaker and i c u and ics values
2835can we check the resistance of earthing electrode while it is connected with the neutral of UPS system
3 5580In Round type three phase transformer why the LV side is inner part and HV outer part in the design of transformer? why they cant be opposite?
2 7100Post New Electrical Engineering Questions
Electronic circuit
I have 2500KVA transformer delta/star,13.8KV/380V provided with LV 4000A breaker. Already I have 2300KW motor feeder with a full load 90%. Is it possible to connect another 1600A from that breaker? If so how the calculation is done?
why are the maintaine power factor and how can this control and this is how work.
A generating system will have a total capacity of 300 MW. Find the probable forced outage when the capacity is supplied by two 150 MW units. The operating probability of all units is P=0.98 and forced outage probability rate Q =0.02 .
Sir, I have applied for the of Assistant.engineer of NPDCL. please send me all AP TRANSCO AND JENCO solved papers of previous exams . I requested send me the papers to my id as soon as possible (rajanikanth_peddi@yahoo.co.in) (This is very urgent) Thank You,
What are the site acceptance tests for power cables, DG Sets, LT panels & 30kVA UPS ?
Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault
What is the current carrying capacity of 0SWG,3SWG,10 & 12 SWG solid bare overhead copper conductors?
what is the meaning of 5% droop or 7% droop in AVR?
if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.
why high speed tripping relay is used in protection circuit why not normal relay
The specific heats of the gas at constant pressure and constant volume are respectively 1.0 kJ/kg K and 0.72 kJ/kg K; the value of R for the gas is
How do i carry out or know the vector group of a Dyn1 and Dyn5 transformer
I have been using an 600VA with 0.6 p.f UPS with my desktop which has 450W power supply unit. Can anyone explain how can this happen . Because the output of the UPS is 360W (600*0.6) (<450W)
Advantages of using generator circuit breaker (GCB) scheme in a power station ?
