SURGE REDUCTION FILTER

摘要

A surge reduction filter (SRF) includes a cartridge having a cartridge housing, a first active connection point for connection to an active line of an AC power supply, and a neutral connection point for connection to a neutral line of the AC power supply. The active and neutral connection points are located to be accessible from outside the cartridge. A first fuse and a first surge protection element are electrically connected in series between the active and neutral connection points. A status circuit is connected to monitor the surge protection element and an indicator is connected to the status circuit to indicate at least a normal status and a fault status of the surge protection element. The status circuit detects a change in voltage at a point between the fuse and the protection element and creates a fault indication if a voltage change is detected due to the fuse operating.

主权项

1. A surge reduction filter (SRF) comprises a cartridge including a cartridge housing, a first active connection point for connection to an active line of an AC power supply, and a first neutral connection point for connection to a neutral line of the AC power supply, the active and neutral connection points being located to be accessible from outside the cartridge, a first fuse and a first surge protection element electrically connected in series between the first active connection point and the first neutral connection point, a status circuit connected to monitor the surge protection element and an indicator connected to the status circuit to indicate at least a normal status and a fault status of the surge protection element, the status circuit detecting a change in voltage at a point between the fuse and the protection element and creating a fault indication if a voltage change is detected due to the fuse operating.