Switch 1 determines which light activation activates the arc stage.
When the switch position is ON, the arc stage only activates on the
light information provided by the unit's own sensors. In OFF position
the arc stage activates on the light information received from any
unit in the same protection zone.

Switch 2 determines the trip relay latch. When the switch is in ON
position the trip relay remains engaged after the arc trip until the fault
is acknowledged at the central unit’s panel. In the OFF position the
trip relay follows the arc fault.

Switch 3 determines the arc trip criteria. When the switch is in ON
position the trip is based on light information only; in OFF position
both fault currents exceeding the current limit and light information
are required.

Released for: Schneider Electric India