Interested to Buy Any Domain ? << Click Here >> for more details...
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 Answers
- 7659 Views
- I also Faced
- E-Mail Answers
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
What are the main significances of root locus?
should %impedance be high or low in a power transformer? if so why?
WHAT IS THE FORMULA FOR CALCULATING CURRENT RATING(DIRECT IN GROUND OR AIR) OF ARMOURED(XLPE) CABLE OF 4C,16Sqmm?
We have 110Vac ,10A ac supply which is converted into 110VDC & How much DC current? which factor is reqired for dc current calulation?
what is the use of current transformer in power transformer secondary side.?its connectyed in WTI
pls tell me about ups internal connection & we have given only 3 phase supply to ups system how get 4 wire (R Y B N )
What is the effect on power factor, shown by a trivector meter; incase of reverse phase sequence. If the power factor of a system is lag what meter will show in case of reverse phase sequence connected to the meter. and What in case of lead.
Good morning: I'm looking for some informations about the OLTC or the LTC: I wont to know what the function of the tie-resistor in during the operation of reversing/coarse operation Cordially
Wt is the function of reactive power? How it generates & consume though resultant is zero?
what is earth pit , how we can measured it, what earth rods reference
Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.
Whether amorphous core transformer is commercialized or not:Name of company making amorphous core transformer and what are different rating?
i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?
What is the difference between a fuse and a breaker?
In Designing the rating & accessories of a MCCB how to choose the type of releases..means what is the basis for selecting, thermal magnetic, electromagnetic & microprocessr based releases
