The remote signal terminal of the surge protection device is the key interface for remote monitoring of the SPD status. Its core function is to convert the SPD operating status (such as normal, faulty, tripped, etc.) into a transmittable electrical signal and transmit it to the remote monitoring system (such as the distribution automation system, computer room monitoring system, etc.), thereby realizing real-time status monitoring and fault warning of the SPD.

  The working principle of the surge protection devices remote signal terminal: First, the remote signal terminal is a simple relay with a normally open terminal, a normally closed terminal, and an AC signal terminal. Typically, the normally open and normally closed terminals are connected to the corresponding device's I/O ports, and the AC signal terminal is connected to the I/O port. Through remote signaling, we can understand the operating status of the surge protector. If the SPD deteriorates and fails, we can promptly detect and repair it to ensure safe operation of the equipment.