ABB Thermal Overload Relay 415V AC

The ABB Thermal Overload Relay 415V AC is an electromechanical protection device designed for motor protection against overload and phase failure. It is meant to be used in combination with ABB A Line contactors to provide reliable protection for motors with a nominal voltage up to 415V AC (and up to 690V AC for some models).

Key features and description of the ABB Thermal Overload Relay 415V AC include:

• It is typically a 3-pole relay that uses bimetal tripping elements, which heat up due to motor current and bend under overload conditions to trip the relay.

• Provides overload protection by tripping when current exceeds the set value (trip class 10A is common).

• Sensitive to phase failure to protect motors from single-phase operation.

• Has built-in auxiliary contacts: one normally open (NO) and one normally closed (NC) for control and signaling purposes.

• Adjustable current setting range to match motor full load amps (for example, 4.5 to 6.5 A for certain models).

• Offers both manual and automatic reset options.