Customer: A heat treatment plant in Shanghai

Designed power supply: A 10 kV feeding line connecting a transformer with a capacity of 2000 kVA, voltage ratio 10/0.4 kV. The main load is a heat treatment system with its accessory facilities, along with motor, lighting and other equipment.

Compensation design: During operation the heat treatment system generates harmonics and the power factor is very low and cannot meet the national power quality standards.

To take the actual situation into consideration, a suggested compensation system is designed with following specification: Detuned factor 7%, total capacity 350 kvar, switching steps 8. The module used for the cabinet is KK 350 PHB 480 A 7. Detailed scheme seeing below: