{"product_id":"danfoss-060b017266-mp-54-differential-pressure-switch","title":"DANFOSS 060B017266 MP 54 Differential Pressure Switch","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e060B017266 (060B017266)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-precision differential pressure switch from the Danfoss MP 54 series, specifically engineered to act as an oil pressure safety control for refrigeration compressors. This specialized switch monitors the pressure difference between the oil lubrication system and the suction pressure within the crankcase. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e060B017266\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efeatures a built-in thermal time relay that provides a critical safety delay, preventing the compressor from tripping during short-term pressure fluctuations during startup. If the differential oil pressure fails to reach the required level within the set time, the switch de-energizes the compressor to prevent mechanical failure. This model has been officially succeeded by the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e060B017291\u003c\/strong\u003e, which maintains the same core functionality and reliability for industrial cooling and HVAC systems.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe MP 54 series utilizes a dual-bellows mechanical system combined with an electrical delay circuit for fail-safe monitoring:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual Bellows System:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIncorporates two separate pressure bellows—one for oil pressure and one for suction pressure. The switch activates based on the physical difference between these two inputs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Time Relay:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrated with a factory-set thermal relay that allows the compressor to run for a specific duration (typically 45, 60, or 90 seconds) without sufficient oil pressure before initiating a safety shutdown.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFactory Calibration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePre-set at a differential of 0.65 bar (9 psig), providing a reliable baseline for most industrial semi-hermetic and open compressors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Test Pressure:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCapable of withstanding a maximum test pressure of 22 bar (319 psig), ensuring the bellows remain intact during system pressure testing or abnormal high-pressure conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBellows Durability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesigned to handle high temperatures, with the bellows rated for short-term exposure up to 100 deg C.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e060B017266 (Legacy)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eReplacement Model\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e060B017291\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDanfoss\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDifferential Pressure Switch\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFactory Setting\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.65 bar (9 psig)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMax Test Pressure (Pe)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e22 bar (319 psig)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAmbient Temp Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-40 to 60 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBellows Max Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIntegrated Relay\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eThermal Time Relay\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eEnclosure Rating\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIP20\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eNet Weight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApprox. 0.85 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Weight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.0 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy has the 060B017266 been replaced by the 060B017291?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eProduct replacements in the Danfoss MP series are typically driven by manufacturing process optimizations or material updates. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e060B017291\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a direct functional replacement, offering the same 0.65 bar factory setting and terminal layout to ensure a drop-in transition for existing maintenance requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the thermal time relay function in this switch?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen the compressor starts, the thermal relay is energized. If the differential oil pressure does not rise above the setpoint (0.65 bar) within the specified time, the heater in the relay trips the mechanical contact, cutting power to the compressor contactor. This ensures the compressor is never operated without lubrication for a dangerous length of time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 060B017266 compatible with all refrigerants?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe MP 54 series is compatible with all common fluorinated refrigerants (HFC, HCFC, CFC). However, for applications involving ammonia (R717), specialized versions with stainless steel bellows must be used to prevent chemical corrosion.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring for Safety:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe thermal time relay must be wired in series with the compressor's control circuit. Ensure that the voltage supplied to the thermal relay (terminals L and M) matches the system's control voltage to avoid burning out the internal heating element.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePressure Connection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eConnect the \"OIL\" bellows to the discharge side of the oil pump and the \"LP\" bellows to the compressor crankcase (suction side). Use capillary tubes with vibration-damped loops to prevent mechanical stress on the bellows connections.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManual Reset:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e060B017266\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a manual reset device. After a trip occurs, the technician must investigate the cause of the oil pressure loss before pressing the reset button. Frequent tripping indicates a serious lubrication issue or a failing oil pump.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Danfoss","offers":[{"title":"Default Title","offer_id":53102417412459,"sku":"060B017266","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/060b017266-4235wteahyb.png?v=1776136905","url":"https:\/\/www.plcprotech.com\/products\/danfoss-060b017266-mp-54-differential-pressure-switch","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}