The arc detecting point sensor PGA LS10 is installed in switchboards in such a way that it has a line of sight to all powered connections, where an arc can develop. Typically, each compartment will have one or two sensors. The sensor is able to detect light from all angles in front of it due to the specially shaped cylindrical lens on the front of the sensor. The detection radius is dependent on the arc power at a trip level setting on the PGR-8800 of in1 in, the PGR-8800 will react to all arcs of more than 3 kA within a 2 m radius.