SNR870 Advanced Grid Anti-Islanding Unit

The SNR870 Advanced Anti-Islanding Grid Protector, manufactured by Zhejiang Chenhai Electric, is a next‑generation protection device for 400V distributed generation. It complies with national distributed power grid‑connection standards, integrating switchgear monitoring, protection, control, and communication. Rated voltage 400V, current 5A, operating temperature -10°C to +55°C. Features include full telemetry (voltage, current, frequency, power, power factor, phase); 10 flexible digital inputs; 4 expandable remote control outputs; over/under voltage protection; over/under frequency protection; rate of change of frequency (ROCOF) protection; reverse power protection; external interlock trip; three-stage overcurrent; zero-sequence overcurrent; system loss-of-voltage; closing on voltage presence; CT/PT disconnection alarm; control circuit break alarm; automatic reset; fault event logging; operation records; RS-485; optional dual Ethernet and fault recording. The SNR870 seamlessly connect…