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 |
what is load which is indicated in power plant generation panel? in any power plant
hi pot test principal
in star connected 4wired transmission system ,what happen if the neutral is grounded . or not grounded. which is significant and y
at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.
types of motor starter
how rectifier transformer work in electroststic precipetatore(esp?
I want to know all basics of electrical engineering
What is the basic difference among IPS,UPS,EPS?
WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?
Why the CT Secondary is rated as 5A generally?
can any one provide some material?
in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know