Class 9999 / Refer to Catalog 9999CT9701
General: Type S contactors or starters can be mechanically
interlocked so that only one device is energized at a time. The mechanical
interlock is an interference (non-jamming) type, locking at the beginning
of the stroke of any starter or contactor.
Type S Sizes 00, 0, 1, and 2—The mechanical interlock is mounted on the underside of the reversing baseplate. Two pins extend from the mechanical interlock through openings in the baseplate and engage the contact carrier of each contactor. Two styles of mechanical interlocks are used: one version for three pole contactors, a different version for four or five pole contactors. When adding a power pole to the left side of an existing Size 0, 1, or 2 three-pole reversing contactor, a new mechanical interlock must also be installed. When added to the right side only, the power pole is not mechanically interlocked with the left-hand contactor.
Type S Sizes 3 and 4—The mechanical interlock is separate from the mounting pan on Sizes 3 and 4. Cams on the mechanical interlocks are operated by the contact carrier of each contactor. The mechanical interlock is attached to the underside of the two contactor baseplates on Sizes 3 and 4.
Mechanical interlock Types SM1 through SM10 for Sizes 00-2 devices use overload relay mounting brackets to support the overload relay portion of the starter. See Overload Relay Mounting Bracket.
Mechanical Interlock for Two Contactors
Overload Relay Mounting Bracket
Bracket for one overload relay used with horizontal mechanical
Bracket for two overload relays
used with vertical mechanical interlocks,
How to Order
To Order Specify: