Overload Relays
Motor Overload Relays for Industrial Motor Protection
Motor overload relays are designed to protect electric motors from overheating and damage caused by overload conditions, phase imbalance, or motor stall situations. These protection devices are commonly installed in industrial control panels and motor control centers (MCCs) where reliable motor protection is critical to maintaining production uptime.
In modern automation systems, overload relays are used alongside contactors, starters, and motor controllers to monitor current draw and trip the motor circuit when unsafe operating conditions occur. Selecting the correct overload relay requires matching the relay’s current range, trip class, reset configuration, and protection features to the motor’s full-load current (FLA) and application environment.
Common applications
- Motor protection in MCC buckets and control cabinets
- Pumps, compressors, and industrial fans
- Conveyors and material handling systems
- Packaging and manufacturing equipment
- OEM machinery and industrial automation systems
Types of overload relays
- Electronic overload relays
- Thermal overload relays
- Solid-state motor protection relays
- Overload relays with communication capabilities
Shop overload relay categories
If you need help selecting the correct overload relay for your motor application, confirm the motor full-load current (FLA), trip class, reset requirements, and mounting configuration before installation.