The rated insulation voltage of series residual current operated circuit breaker is 1000V, which is suitable for three-phase four-wire neutral point direct grounding (TT) distribution networks with 50Hz AC, 400V rated voltage and 630A rated current. It is used to provide indirect contact protection, prevent fire danger caused by grounding fault current due to equipment insulation damage, and protect lines and power supply equipment from overload, undervoltage, short circuit, and single-phase grounding faults.

• High-performance 32-bit ARM microprocessor for real-time intelligent control.
• LCD Chinese/English display provides friendly HMI and simple operation.
• Residual current (leakage) protection with online settings and reclosing function.
• Long delay, short delay, and instantaneous three-stage protection with electronic tripping.
• High breaking ability ensuring reliable short circuit protection.
• Integrated overvoltage, undervoltage, and phase loss protection.
• Network type includes communication functions for remote telemetry and control.