# power factor calculation and number of steps requared

Home Electrical Engineering Forum General Discussion power factor calculation and number of steps requared

Viewing 2 posts - 1 through 2 (of 2 total)
• Author
Posts
• #10425
Keymaster

How do i calculate the number ,size of capacitors in kvar ,size of current transfomer,power factor regulator ,mcb and contactor amps where the customer has 18000 btu 20 pieces single phase air condition .2 pieces 3 phase 48000btu.1 hp water pump,2fridge 1 chillar and 2 freezer.total consumpution is around 110 kva.

#11907
Keymaster

Well to calculate the capacitor bank size,u must determine ur  current power factor and decide on the new power factor to be achieved depending on ur country's regulations but normally its between 0.95 and 1

Judging from the equipment u have,ur power factor is at 0.8-0.9,but better to determine them from the nameplate

to get the kvar for example:

tan(arccos1)-tan(arccos.8)=Y

then KVAR=Y x KW ( and not KVA)

Viewing 2 posts - 1 through 2 (of 2 total)
• You must be logged in to reply to this topic.