Overload switches

Overload Switches for Motor Protection

Overload switches are critical safety devices used in compressed air systems and motor control applications to protect electric motors from overheating and damage. They monitor the current drawn by a motor and disconnect power when excessive current persists, preventing costly failures and downtime. :contentReference[oaicite:0]{index=0}

When a motor operates under load, it draws electrical current. Occasional surges are normal, especially during start-up, but sustained high current can cause overheating of motor windings and other components. Overload switches detect these overload conditions and automatically interrupt the circuit before damage occurs. :contentReference[oaicite:1]{index=1}

Overload protection devices are typically used alongside contactors and starters in motor control circuits. When an overload is detected, the overload switch trips, cutting power to the motor and preventing further stress on the system. After the cause of the overload has been resolved, the switch can be reset manually or automatically depending on the model. :contentReference[oaicite:2]{index=2}

Common Uses of Overload Switches

• Protection for compressor motors and air system components
• Motor starters and control panels
• Pumps, fans, blowers, and industrial machinery
• Applications where sustained overcurrent could cause overheating

Choosing the correct overload switch helps maintain reliable operation, extends the life of electric motors, and reduces the risk of unplanned downtime or costly repairs. If you’re unsure which overload protection device you need, our team can help.

Call Compressed Air Systems UK on 01217 533330 for expert advice and assistance.