MILL
DUTY CONTACTORS- WHERE TO USE
Use
replacement GE contactors for crane, metal-rolling
mill and all other heavy industry dc control. GE
Contactors are available mounted or unmounted in
either front- or back-connected forms. Use unit-mounted,
front-connected form for mounting on metal or insulating
panels. Use unmounted back-connected form for assembly
directly on your own insulating panel.
Select
sizes according to motor horsepower and
time rating. Use forms with blowout rating for dc
power interruption.
Time
rating of normally closed contactors—Coils
of contactors with normally closed poles are for
intermittent duty only. The coils can be energized
30 percent of the time but not more than 10 minutes
continuously or 20 minutes continuously if only
once out of three hours time. |