The Johnson Controls P145NCB-12C Lube Oil Pressure Control is an electromechanical safety device designed to protect pressure-lubricated refrigeration compressors from low oil pressure conditions. It monitors net lubrication oil pressure and activates a time-delay circuit, allowing pressure to build during startup while preventing nuisance shutdowns from brief pressure drops. When oil... https://www.partshnc.com/johnson-p145ncb-12c-lube-oil-pressure-control-w-alarm-circuit