In power system of 6-66KV, when capacitive current associated with single-phase ground fault excess 10A (It is 30A in 6-10KV cable circuit system), arc-supression coil device should be adopted to prevent damages. The device is designed based on eletrical standard of DL/T620-1997 (standard of overvoltage protection and insulation co-ordination of AC electrical equipments)
Structure of the Complete Set of Device
1. MRD-XHZ micro-computer controller and PK screen.
2. Grounding Transformer
3. Arc Suppression Coil with Adjustable Turns on Load
4. MRD Damping Resistor Cabinet attached with Current & Potential Transformer.
Post by Angela Tong Electrical Equipment & Supplies @2012-02-27 15:08:51