Compressor Parts Switch - Over Load For Compressors
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An air compressor pressure switch with an integrated thermal or current overload protects the motor from overheating, excessive current draw, and stalled-rotor conditions.
Key Components & Functions
• Pressure Switch: Automatically starts the compressor when tank pressure drops (cut-in) and stops it when it reaches maximum pressure (cut-out).
• Overload Protection: Trips the circuit or cuts power if the electric motor pulls too many amps or overheats. In 3-phase or larger units, this is often matched with a specific amp range (e.g., 2.5 to 23 amps) or a dedicated overload relay.
• Unloader Valve: Releases trapped air from the cylinder head when the compressor turns off, making restart easier on the motor