The power factor of a load is defined as the ratio of active power to apparent power, i.e. KW:KVA and is referred to as cos φ. The closer cos φ is to unity, the less reactive power is drawn from the supply.
Why PFI is Necessary:
* A reduction in the overall cost of electricity can be achieved by improving the power factor to a more economic level.
* The supply will be able to support additional load which may be of benefit for an expanding company.
* Reducing the load on distribution network components by power factor improvement will result in an extension of their useful life.
Application: Any installation, including the following types of machinery or equipment is likely to have a low power factor, which can be corrected incorporating a suitable PFI plant, with a consequent saving in charges:
a) Induction Motor of all types.
b) Power Thyristor installations for DC motor control & electro-chemical processes.
c) Power transformer and voltage regulators.
d) Welding machines.
e) Electric-arc and induction furnaces.
f) Choke Coils and Magnetic systems.
g) Neon signs and fluorescent lighting.