Where is the low-pressure cut-off switch installed in a typical refrigeration system?

In a typical refrigeration system, the low-pressure cut-off switch is installed before the compressor. This placement is crucial because the switch monitors the pressure in the system, and its function is to protect the compressor from running under low-pressure conditions, which can cause damage due to a lack of refrigerant or other issues.

When the pressure drops below a certain threshold, indicating a potential problem such as a refrigerant leak or a failure in the evaporator, the switch interrupts power to the compressor. This safety feature prevents the compressor from attempting to operate without adequate pressure, which could lead to a breakdown or failure of the compressor.

Positioning the low-pressure cut-off switch before the compressor allows it to effectively manage the operating conditions of the system and maintain its integrity, ensuring safe and efficient operations.