Type 1

The type 1 surge protector is recommended for specific situations in the service sector and industrial buildings, which protects electrical devices from direct lightning and releases the backcurrent caused by lightning diffusing from the grounded conductor to the network conductor.

Type 1 surge protector is characterized by a current wave of 10/350 μs.

Type 1 surge protector can be used in the photovoltaic system between the photovoltaic array and the main service isolation switch, which is mainly used in the central inverter.

Type 2

Type 2 surge protector is the main protection system for all low voltage electrical devices and is designed to be used for service. A device on the load side of an overcurrent device; includes a surge protector and a plastic shell surge protector located at the branch panel. The Imax value is the maximum single discharge current represented by the 8 / 20 μ s waveform that the surge protector can support.

Type 3

Type 3 is generally used in terminal power distribution equipment, surge protector should be series voltage-limiting power supply lightning arrester, its lightning current capacity can not be lower than 10KA. The minimum length of the conductor installed from the electrical service panel to the point of use is 10 meters, and the conductor attached to the surge protector or used to connect the surge protector shall not be installed within a distance of 10 meters.