kva is a unit of electrical equipment capacity, pronounced kilovolt-amperes. 1 kW = 1 kVA. The formula for converting kVA to kW is: kW = kVA times power factor.
kVA is equivalent to the current in a circuit generated by the voltage of that line, usually measured in a transformer, which means that he is a unit of current.
The power supply department in order to improve the cost-effectiveness of the user is required to improve the power factor:
1. Through the improvement of the power factor, reduces the total current in the line and the power supply system in the electrical components, such as the transformer, electrical equipment, conductors, etc., the capacity, and so not only reduces the cost of the investment, but also reduces the own The loss of electrical energy.
2, good power factor values to ensure that the power supply system to reduce the voltage loss, can make the load voltage more stable, improve the quality of electricity.
3, can increase the margin of the system, tapping the potential of the generation and supply equipment. If the power factor of the system is low, then in the case of existing equipment capacity remains unchanged, the installation of capacitors can improve the power factor and increase the capacity of the load.
For example, the power factor of a 1000kVA transformer is increased from 0.8 to 0.98:
Before compensation:
Before compensation:
After compensation:
After the same 1000kVA transformer, the power factor is changed so that it can take on 180kW more load. 180kW of load.
4, reducing the user's electricity bill; through the reduction of the loss of the above components and power factor to improve the tariff concessions.