On the secondary side of a distribution transformer, we use
1c x 630 sq mm cable. Why dont we use 4 core cables instead
of 1 core cables on the secondary. Why we use aluminium
cable glands on the outgoing instead of brass cable glands?
- 2 Answers
- 9815 Views
- Siemens, I also Faced
- E-Mail Answers
Answer Posted / pp
As the Transformer size increases the current flowing
through LT also increases. For Transformers of 630 kVA and
above, single core cables are used for LT as the insulation
is not sufficient enough to carry large amount of current
at source (T/F Secondary)for poly core cables and leads to
phase to phase faults.
Note: current for cable at Secondary termination is larger
than at any point due to creation of multiple circuits.
Poly core cables are available in sizes upto 300 sq.mmm.
for LT .
| Is This Answer Correct ? | 7 Yes | 1 No |
Post New Answer View All Answers
What is the difference between earth fault protection of motor feeder with CBCT and Without CBCT ?
what are the usual topology of transformers at different substations in the power system and why that particular topology is choosen. what are the limitaions of that topology?
what is quality factor in series resonance circuit and calculate the factor of voltage magnification? how it happens?
what is the difference between elcb and rccb ?
How we can come to know the substation range,without go through any name plate ?
Earth leakage relay basic knowledge principle
Why 15Amp. MCB is suitable to carry load of 1.5Ton Ac please Explain?
What is the accepted limit to increase the choosen transformer capacity over the load and why ?
what r the safety measures in UPS ? explain all?
hai friends i have BSNL JTO exam on next month so if any body have model question paper or give preparation tips to my mail id kumar4486@yahoo.co.in this will helpfull for my future .plz & thank u by kumar
What is mean by Sensitive Earth fault & what are the effects
1.what is difference in maintain Hz again Hz in USA ? 2.how to calculate the battery AH? 3.why are yearly maintained in transformer how many tests in required?
a 100mva,400/200v transformer has leakage impdce of 10% draws a steady state line currentof---------------
How to calculate per unit impedance of transformer?
How npn and pnp transistor works
