7PA51系列快速跳闸继电器专为电力系统继电保护跳闸出口回路设计，作为保护装置与断路器跳闸回路之间的高速辅助继电器，实现保护命令快速重动、断路器跳闸及多回路触点扩展。产品具有毫秒级快速动作、8组转换触点，可满足线路、变压器、母线、发电机等保护系统对快速故障切除和可靠跳闸的应用要求。High Burden型符合ESI 48-4 EB2:1983相关要求，可提高对长电缆分布电容放电、感应电压及瞬态扰动的耐受能力，降低非预期动作风险。

The 7PA51 series High-speed Trip Relay is specifically designed for the trip output circuit of power system protection relay. It serves as a high-speed auxiliary relay between the protection device and the circuit breaker trip circuit, enabling fast repetition of protection trip commands, circuit breaker tripping, and multi-circuit contact expansion. The relay features millisecond-level fast operation and 8 changeover contacts, meeting the application requirements of line, transformer, busbar, generator and other protection systems for rapid fault clearing and reliable tripping. The High Burden type complies with ESI 48-4 EB2:1983 requirements, improving tolerance to distributed capacitance discharge of long cables, induced voltage, and transient disturbances, thereby reducing the risk of unintended operation.