For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.
3 7845In the Variable Voltage Variable Frequency Drive, how the Voltage and Frequency varied ? Is it varied in the Inverter part of the Drive ? Please give us supporting document if any.
2002in our sub station why we step down firstly 33kv\11kv then 11kv to 430v. can we direct step down 33v to 430.v.
18 43514When semiconductor fuse does save thyristor in each cycle of conduction? Why under voltage setting keep less in SPRS and more in DC drive?
2150Post New Electrical Engineering Questions
what is 3rd Harmonics? how it is generated in alternator
What is dielectric loss?
what is is the potential diffrence between two phase ?
sir, iam a electrical engg graduate and i want to go in automation sector and for this i have decided to do industrial training for this,plz suggest me some good institute for the same in delhi,ncr. my degree percentage is 58%, can i get job after doing training, plz help....
what is the mechanical safety of DG ?
Usage of flywheel diode in relays
bsec exam syllabus (mis)
What effect does a very low impedance have on the Voltage regulation? On the short-circuit current?
Why arc quenching is used in Diode ?
Why the arms of delta in a delta-wye power transmission system are kept constant??
What is meant by cold loop test in instrument
Is any generator is developed which is operated with out diesal or other expensive source?
What happens to voltage when current is zero?
How much kv gas generator is needed to run 2 hp and 1 hp airconditioners, plus a refrigerator and 4 Tvs
what are safety measures in /control in diesal engine/ explain them?