what is derating factor in Cable ? how we minimise this?
Answer Posted / helwan university
type of derating factor:
1-soil thermal resistivity
2-grouping factor(cable distrubtion in trays horizontial
-verticals)
3-temp derating factor
4-burial depth derating factor
| Is This Answer Correct ? | 68 Yes | 7 No |
Post New Answer View All Answers
What is the best thing to protect the motor from running over full current. CT or O/L or pressure transducer at the given pressure rating
what is ramping rate of generator
What is the difference between Generator Differential Relay and Transformer Differential Relay?
Electromagnetic torque developed by the motor is compared to shaft torque. A less B same C depends on motor design D more
how pt is using
How can I calculate ISF of current transformer?
why zero sequence impedance measurement is not applicable for single phase GT
why does make gain margin and phase margin on same plot.?
Why 9KV surge arrester having 7.65KV of MCOV?
When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?
we have consol make 3 phase servo stabilizer for cnc m/c. while installing the earth neutral voltage is 1.7 volts at stbilizer off condition and when stabilizer get on en voltage reaches 4.8 volts (new earthing is done and neutral is helthy condition all phase to neutral volts 440,442,441 v)why this happen.solution for cause.
What is the formuala to calculate the rating of motor protection circuit breaker
pls someone send me sample question papers along with the key.thanks in advance
What can you contribute to the progress of our Company as an employee if you are selected?
i applied for the ap transco please forward the freqventley asked QA