High pressure cutout switch

HIGH-PRESSURE CUTOUT SWITCH A high-pressure cutout switch is connected to the compressor discharge line to protect the high-pressure side of the system against excessive pressure. The design of this switch is essentially the same as that of the low-pressure cutout switch. However, the low-pressure cutout switch is made to CLOSE when the suction pressure reaches its upper normal limit. The high-pressure cutout switch is made to OPEN when the discharge pressure is too high. As mentioned before, the low-pressure cutout switch is the compressor control for normal operation of the plant. The high-pressure cutout switch, on the other hand, is a safety device only and does not have control of compressor operation under normal conditions. ----------------------------------------------------------------------------------- MOHAMMAD IMRAN HVAC ENGINEER