Device for protecting electrical installation against arcing between supply lines - has one end of fuse in path of arc, causing fuse to melt if arc occurs and releasing pin that activates switch to short-circuit main supply and trip main protection

摘要

The electrical protection device is applied to the incoming supply, and has a component (1) that is destructible when it makes contact with the arc. An electrical contact (7) produces a short-circuit that activates the main line protection (8) if an arc fault is detected. The presence of the arc is detected by a fuse (1) with one end positioned in the path of any arc that occurs. Melting of this fuse releases a pin (6) which activates the electrical contact (7) to produce a short-circuit that will activate the main protection.