formula for incomer breaker size calculation of powerfactor
correction unit
Answers were Sorted based on User's Feedback
you need to consider of breaking capacity too
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / matt
Given a system power factor of 0.9, PFC unit of 50kvar we can work out the following
50/0.9 = 56 A real current
56^2 * 50^2 = 75 A apparent current
Cable capacity - 75 * 1.35 = 100 A
Factor of 1.35 used for over rated capacitors as per
industry standards.
Breaker shall be rated at less than the cable capacity but greater than 75A. Increase cable size to suit breaker breaker sizing if required.
Is This Answer Correct ? | 6 Yes | 6 No |
Answer / mohan
Amps Per KVAR is between 1.1 to 1.3 Amps
for a 300KVAR panel
the current shall be 130 AMPs(and if the capacitors are
auto swithced , then switching surges need to be considered
hence) * 1.5 Times = 585Amps
The nearest breaker size is 630AMPS
It is preferable to use Capcitor duty contactor for
switching
Is This Answer Correct ? | 1 Yes | 6 No |
How much Fault current can be contributed by a motor?
In three pin socket normally three pin in between three pins earthing point is more thickness why?
what is dc transformer? how it work?
in industrial lighting in each circuit how many lamps can be given? and how much load can be put on each circuit? is there standard for this? please help me with the standard description?
why we generate transmit and distribute electrical supply in multiple of 11
How can we calculate the KVA rating of a Distribution transformer from its core details?
Can anybody explain me the electrical circuit of indian railways to drive electrical engines(LOCOMOTIVES)? How does overhead lines work in the circuit to drive different trains on the same track?
SSC JE ELECT.
Can a dc motor works as a dc generator. If yes , then how?
Why Cables are always circular and not square or rectangular?
how choose conductor &caple&wire depending upon the load
what is mean by induction & conduction principle ? how they differ from each other ? thank you