The 4310 fused magnet safety disconnect switch is
designed to safely allow the operator of a lifting magnet to disconnect
the highly inductive magnet while the magnet is still energized.
Standard safety switches are not designed to safely disconnect an
energized magnet.
The 4310 has (3) power poles. Two normally open power poles to
disconnect the incoming power and a third normally closed power pole
that shunts the magnets energy into a discharge resistor when the
disconnect is switched to the off position.