Coordination of Surge Protectors in Low-Voltage AC Power Circuits

Surge protectors can be installed in low-voltage ac power systems to limit overvoltages imposed on sensitive loads. Available devices offer a range of voltage-clamping levels and energy-handling capability, with the usual economic trade-off limitations. Coordination is possible between low- clamping-voltage devices having limited energy capability and high-clamping- voltage devices having high energy capability. The paper gives two examples of coordination, as well as additional experimental results on surge propagation.