Which device prevents a compressor in a refrigeration system from restarting after an overload failure or safety switch cutout?

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The lockout relay is designed specifically to prevent a compressor from restarting after it has experienced an overload failure or has been shut down by a safety switch. This safety feature is critical in ensuring that the compressor does not attempt to restart under potentially harmful conditions, which could lead to further damage to the system or failure of the compressor itself.

In a refrigeration system, when certain safety parameters are not met, the lockout relay will engage and cut power to the compressor. This keeps the compressor from restarting until the issue that caused the overload or cutout has been resolved, ensuring safe operation and prolonging the life of the equipment.

The other devices mentioned serve different functions within a refrigeration system. For example, a thermostat relay would control the temperature settings and activate or deactivate the system based on temperature readings. A capacitor relay is typically used to boost starting torque for motors. A start relay, on the other hand, aids in providing the initial power needed to start the compressor, but does not have the protective functions of the lockout relay.

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