top of page

OPERATION OF HIGH PRESSURE CUT OUT ON REFRIGERATION PLANT?

Reasons for activation of high pressure cut out, High-pressure cut-off switch working, Safety devices on the refrigeration system of a ship, marine refrigeration troubleshooting, what causes high discharge pressure, compressor high pressure alarm.

Reasons for activation of high pressure cut out


Reasons for activation of high pressure high pressure cut out: Loss of cooling water.  High ambient temperature.  Air, or other incompressible gases in the system.  Obstruction in the discharge line of the compressor.
Reasons for activation of high pressure cut out
Working of high pressure high pressure cut out: For protecting the compressor from high pressure and subsequent failure, a high pressure cut out is provided that take a pressure tapping from the discharge line and when it detects an over pressure, it stops the compressor. The HP cut out is not resettable automatically but has to be reset manually by the operator. This is because the high pressure is a serious fault and the cause must be investigated and corrected before the plant is started again.
Working of high pressure cut out


Working of high pressure high pressure cut out: It has a bellows that is set against a spring.  The nut at the end of the spring is used to adjust the cut out pressure.  When the high pressure gas enters the bellow, the bellow expands and presses the spring.  At the cut off pressure the movement of the bellow against the spring releases the catch and the contact is broken and the compressor cuts off. The switch arm can be pressed and the cut out reset after the cause of the over pressure has been found and rectified.
Working of high pressure cut out
Working of high pressure cut out



Comments


bottom of page