Model Classification Of Surge Protectors

Voltage-Limiting Type surge protective device (SPD)

Common nonlinear components include zinc oxide varistors and transient suppressor diodes. These are widely used overvoltage protectors and are generally suitable for indoor use (i.e., in the LPZ0B, LPZ1, and LPZ2 zones).

Combination Type surge protector (SPD)

Combines voltage-switching and voltage-limiting components. Depending on the applied impulse voltage characteristics, the SPD may exhibit switching characteristics, voltage-limiting characteristics, or both.

Main Technical Parameters Characterizing SPD Selection

surge protection device Protection Modes

SPDs can be connected between the L (phase), N (neutral), and PE (protective conductor) in various configurations, such as L2L, L2N, L2PE, and N2PE. These connection configurations are dependent on the grounding type of the power supply system.