Different Installation Locations and Benefits of Capacitors
Technical Support
Selection of Installation Locations and Effects
Central Installation in Substations on High Voltage Circuits (High Voltage Bus)
This method entails lower equipment costs and easier installation; however, its effectiveness is not as pronounced as when installed on the low voltage side. It only effectively addresses the power supply side at the installation point.
Installation on the Low Voltage Side
The closer the capacitors are to the load devices, the better. Ideally, each load should have its own appropriately sized parallel power capacitor. This approach helps reduce power losses across the entire power system, including high and low voltage lines, transformers, etc., while allowing the equipment to operate with sufficient margin. However, this method tends to involve higher installation costs.
Installation on Loads with Poor Power Factors and High Voltage Motors
Individual installation of appropriately sized power capacitors for these loads is recommended. For other loads, a comprehensive approach using power capacitors in the high voltage circuit can be employed to improve the power factor, thus combining both previous methods.
Fuse Link Capacity during Installation (High Voltage)
The fuse link capacity should be selected to be 1.65 to 2.5 times the rated current of the capacitor. When multiple units are installed side by side, a spacing of at least 8 cm should be maintained to facilitate heat dissipation.
Avoid Using Copper Plate Connections for Parallel Connections
This applies to both high voltage capacitors and low voltage outdoor capacitors.
Wiring and Switch Equipment Capacity
The capacity should not be lower than 1.35 times the rated current of the capacitor.
Maintenance Work
Before performing maintenance, the power supply must be disconnected for 5 minutes for high voltage and 3 minutes for low voltage, ensuring that no residual voltage remains before proceeding.
Other Precautions
Detailed attention should be given to the back of the capacitor inspection card for additional notes.
