When the compressor works, there is one oil pump will force the oil to circulate and lubricate. The electric controller for oil pressure difference is a safety protection switch for the screw compressor.
When the oil pressure drops to make the compressor safe to work, and during the time delay setting, the oil pressure is not restored to the set, the main circuit is cut off, the compressor stops working, in order to protect the compressor from the damage.
There are two pressure interfaces, respectively connected to high and low pressure.
Typical principle diagram of electric controller for oil pressure difference
Typical circuit diagram of electric controller for oil pressure difference
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