Surge protection devices (SPDs) are suitable for the IT, TT, TN-C, TN-S, TN-C-S power supply system of 50/60Hz, rated voltage 400V AC and below, protecting them from direct and indirect lightning impulse and other transient overvoltage. With max. discharge current of 20kA / 40kA / 60kA / 80kA, the SPD is designed in accordance with IEC Class II, reliable performance and low price.

Specification

Note: In order to ensure normal operation of power network after SPD is invalid, a fuse or circuit breaker shall be in series connected in L line.

Dimensions (Unit: mm)


Tips: What is a surge protection device?

The surge protection device (SPD) is an electronic device that provides a protection for electrical equipment, communication network etc. from the effect of surges. When a current spike or voltage surge suddenly occurs in an electrical circuit or a communication line due to external interference, the SPD can conduct the shunt in a very short time, thereby avoiding the damage of the surge to other equipment in the circuit.

Surge protective devices are designed to minimize the effects of the indirect and direct lightning or other transient overvoltage surges, suitable for surge protection in residential, tertiary industrial and other industrial applications. SPD has several protection modes: L-L, L-G, L-N, N-G and its combinations.

The SPD surge protector is an indispensable device for lightning protection in the electronic equipment. Its role is to restrict the transient overvoltage that enters the power line and signal transmission line to the voltage range that the device or system can withstand, or to discharge powerful lightning current into the ground, thus to protect the equipment or systems from shocks.