Bimetallic Overload Relay

Stand-Alone Mounting Bracket (Mounted to the Overload Relay)

The adapted bimetallic Type S starter incorporates a mounting bracket for use with a self-contained adjustable bimetallic or solid state overload relay. A separately mounting version of the bracket is also available for use with contactors that do not offer the same terminal configurations as the Type S, or for applications with height restraints that demand mounting next to the contactor rather than directly below as is typical for most starter configurations.

The bimetallic thermal overload relays feature Class 10 or Class 20 protection with automatic and manual (hand) reset and a trip-free mechanism. These overload relays are ambient temperature compensated, and available with or without phase imbalance protection. The component is available as a replacement on a starter or as a separately mounted overload relay with the relay adapter. Factory or field-installed: LRD and LR3D overload relays can be factory installed if the FLA of the application is known. They can also be purchased separately and field installed.

The solid-state overload relays feature Class 5, 10, 20 or 30 protection (dip switch selectable) with automatic and manual (hand) reset and a trip-free mechanism. These overload relays are ambient-temperature compensated and can be wired for single-phase applications (must use the three-pole unit). The component is available as field-installable on a starter with the adapter installed, or as a separately mounted overload relay with the relay adapter. If using the LR9D with a single-phase motor, the three-pole adapter must be purchased to accommodate looping of the motor leads.

For more information, see Adapted Bimetallic Overload Relay for NEMA Type S Starter.