In Enphase installations, the Q Relay (network system relay controller) acts as a physical disconnection device relay controller for single-phase installations. During specified grid abnormalities, the Q Relay disconnects the Enphase Microinverters from the AC grid, and when the voltages return to normal and the grid frequency is in the acceptable range, the Q Relay reconnects the system. The Q Relay works with the Envoy-S to break both line and neutral, when needed, per grid requirements.

Datasheet

Installation Guide