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.
Answer Posted / engr. l. o. osuji
Thanks to the respondent.I would like to tell him that no
load was connected besides linking Aa in accordance with
the method for the test. Also, note that similar 2.5mm2
cable has been used on a similar Unit Auxiliary 2.5MVA
11/3.3kV delta-star T/F and 60MVA 132/11kV star-delta T/F
respectively. No burning occurred. Test results were
satisfactory. This piece of information should guide any
contributor. Thanks.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
if i am in front of transmission line how to know that current direction without any equipment
What is corkscrew rule?
what is the usage of microcontroller in the panel board?
Block diagram of Power line communication?
Motor,transformers,capacitor tubelight etc....
What is the function of capacitor in electrical circuits?
What are your future plans for the company if permanently employed?
WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?
How to reduce the static electricity producing in solvent room? By P.D.Patil BioCon
what is meaning of bus riser
What are the protections for safe running of electric generator?
Explain thin film resistors and wire-wound resistors
how the phase convertor changes the no. of phases
What is resistance of 50meters, 16sq.mm, single core copper cable?
Name the test signals used in control system