Sunday, 5 May 2013

Disadvantages of low power factor

Disadvantages of Low power Factor:
  • Large KVA rating of equipment:
KVA= KW / cosθ
If equipment has low power factor  then KVA rating of the equipment greater making the equipment larger and expensive
  • Greater conductor size.
  • Larger copper losses, grater the KVA rating, greater the current, due to large current copper losses also increases
  • Poor voltage regulation.
  • High energy bill:
Low power factor  increases the KVA demand which in turn increases the energy bill.
Energy bill = KVA demand charges + energy charges


  1. Hi, nice post got valuable information about Power factor.
    Power factor improvement plays a major role in the industry, which saves lots of money and strengthens the life of the machine.