井下高压低压漏电保护防越级跳闸的研究

Anti-override Tripping of High and Low Voltage Leakage Protection in Underground

针对西山煤电集团公司所属矿井供电系统越级跳闸现象,将地面35 kV主变压器供电方式通过入井电缆引至井底车场中央变电所6 kV高压供电系统,通过改造目前井下使用的防爆开关内部结构,使集团公司所属各矿高压、低压供电系统漏电保护动作可靠、准确性更高,整个矿井高低压供电系统运行更安全。

Aiming at the override trip phenomenon of the mines power supply system in Xishan coal electricity group company, the ground 35 kV main transformer power supply mode by downhole cable lead to 6 kV high voltage power supply system of central substation of shaft station. Through reforming the internal structure of the explosion - proof switch used in underground currently, makes the leakage protection of high - voltage and low - voltage power supply system in each mine of the group company is reliable operation, accuracy is higher, the high and low voltage power supply system in the whole mine runs more safely.