what is derating factor in Cable ? how we minimise this?
- 18 Answers
- 113068 Views
- Bhel, College School Exams Tests, I also Faced
- E-Mail Answers
Answer Posted / kaustav bhadury
Answer 9 is the most comprehensive...
U get loads of standards based on the country u r in..
If in duct-
1) Soik Thermal resistivity : Basically the max temp in the
surrounding. 40*C is the standard.
2) Conductor grouping : Due to arrangement of multiple
conductors there is a development of an EM field which
opposes the flow and thus we need to consider this factor.
3) Temp. Derating Factor : In this the arrangement of cables
in a conduit is of prime importance. It should be in such a
way that all cables have a minimum space to dissipate heat
into the surroundings. The cables can touch each other but
anyone cable should not be fully surrounded by other cables.
4) Burial Depth : Depends on the length below ground where
the conduit is laid.
| Is This Answer Correct ? | 12 Yes | 3 No |
Post New Answer View All Answers
What kind of socket shall be provided for window type air conditioner with cooling capacity upto 18000 BTU/hr
how we calculate torque ? how we improve it ?where torque will either motor or generator ?
What types of question are done for diploma students in aptitude test
full form of electrical?
how to calculate the earth fault current
hai now i am working as a electrical design engineer in construction field can i get a job in oil and gass field or power plant project as a electrical design engineer?
Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise carrying amps rating.Please give the solution with a good example.
Why 11kv to be generated in generation station
how to calculate the earth mat design in 132 kv substation yard ????
Purpose of providing neutral isolation panel for parallel operation of diesel generator
What is the difference between the relay and the circuit breaker?
How you give clearance to a spare feeder.
how does WTI work ?
i am going to attaned the engineer (disign)iterview at HAL please give me duid line
I would like to know that the fault curretn at base load and at 10% generation will be same? Fault level of BUS remain same with different generation?
