On the secondary side of a distribution transformer, we use 1c x 630 sq mm cab

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?

Question Posted / jimsreedharan_78

2 Answers
11212 Views
Siemens, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

On the secondary side of a distribution transformer, we use 1c x 630 sq mm cable. Why dont we use ..

Answer / 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

On the secondary side of a distribution transformer, we use 1c x 630 sq mm cable. Why dont we use ..

Answer / k.prakashchandra

Cables of above 250 sq mm come in single core only in view
of the weight, workability and replacement.Al glands are to
be used for Al cables to avoid bi-metallic contacts.

Is This Answer Correct ?

3 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

why insulators are colured in brown only?

3 Answers Transco,

how to connect the three phase capacitor in three phase star/delta connection motor?

1 Answers

what is Electrical BMS

3 Answers

what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

1 Answers Toshiba,

what is difference between cpp electrical system and refinery electrical system

1 Answers

How do I know if a transformer is saturated? I am doing the simulation of the saturation of a transformer, but what parameter tells me when a transformer is saturated? How do you calculate? is on the plate?, there is a rule that can help me? How could model? I understand the saturation occurs when the flow can no longer bind to the other winding, this is given to certain current, this current is the same that appears as the highest in the bale of features? Thank you for your help Eduardo Alvarez Guatemala

3 Answers

What is the difference between Earthing & grounding

4 Answers

what is FS cable?? Difference between FS and FRLS??

1 Answers Multivista Global,

Different between megger and contact resistance meter

3 Answers

why are you interested in joining in core company instead of joing in software company

11 Answers

what are effects of harmonics in the three phase a.c power system ?

2 Answers AIIMS,

what is MC 61 relay

2 Answers

For more Electrical Engineering Interview Questions Click Here