{"product_id":"1svr730885r3300-cm-mps-21s-abb-three-phase-rms-monitoring-relay","title":"1SVR730885R3300 CM-MPS.21S ABB Three-Phase RMS Monitoring Relay","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"citation-223 citation-end-223\"\u003eThe ABB CM-MPS.21S, identified by order code 1SVR730885R3300, is a multifunctional three-phase monitoring relay designed to provide comprehensive protection for electrical power systems and industrial machinery.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eOperating as a critical diagnostic component within the AC500 range and broader DCS architectures, this True RMS monitoring device evaluates phase parameters with extreme precision.\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"citation-222 citation-end-222\"\u003eIt is specifically engineered to detect phase failure, phase sequence, overvoltage, undervoltage, and phase unbalance.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eBy providing real-time oversight of the power supply quality, the CM-MPS.21S prevents costly motor damage and equipment degradation, serving as a first line of defense in automated industrial environments.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Architecture and Hardware Metrics\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModel Designation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCM-MPS.21S\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGlobal Order Number:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1SVR730885R3300\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMeasurement Principle:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTrue RMS (Root Mean Square) monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-221\"\u003e\u003c\/span\u003e\u003cstrong\u003eProtection Functions:\u003c\/strong\u003e\u003cspan class=\"citation-221 citation-end-221\"\u003e\u003cspan\u003e \u003c\/span\u003ePhase failure, Phase sequence, Over-\/Undervoltage, Phase unbalance\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNet Weight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0.12 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePhysical Dimensions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1.5 x 18.6 x 12.8 cm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDIN rail (Snap-on)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConnection Technology:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePush-in or screw terminals (Variant dependent)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProduction Origin:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSweden\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTariff Classification:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHS 8537101190\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSystem Compatibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAC500 \/ Distributed Control Systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module features a slim 22.5 mm width housing, maximizing cabinet space efficiency.\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"citation-220 citation-end-220\"\u003eIts True RMS measurement capability allows it to accurately monitor distorted wave forms, making it ideal for modern industrial networks where non-linear loads and variable frequency drives are present.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eStrategic Industrial Implementations\u003c\/h3\u003e\n\u003cp\u003eThe 1SVR730885R3300 relay is a versatile safety asset utilized in various mission-critical sectors:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-219\"\u003e\u003c\/span\u003e\u003cstrong\u003eMotor and Pump Protection:\u003c\/strong\u003e\u003cspan class=\"citation-219 citation-end-219\"\u003e\u003cspan\u003e \u003c\/span\u003ePreventing phase reversal or single-phasing in industrial motors, which can cause catastrophic overheating and mechanical failure.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDCS Power Supervision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eActing as a localized diagnostic node within an AC500 PLC setup to monitor the stability of the incoming supply before distributing power to sensitive I\/O.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHVAC and Compressor Control:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnsuring correct phase sequence for three-phase compressors to prevent reverse rotation and internal damage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial Handling and Elevators:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProviding a safety interlock that prevents machinery from starting under improper voltage conditions or phase unbalance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the benefit of True RMS monitoring in the CM-MPS.21S?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-218 citation-end-218\"\u003eA: True RMS measurement allows the relay to accurately calculate the effective voltage even when the power supply is distorted by harmonics or noise, which is common in environments with power electronics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 1SVR730885R3300 require a separate neutral connection?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: This specific \"S\" version (CM-MPS.21S) can be used in three-phase networks with or without a neutral conductor, offering high flexibility for different electrical grid configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this monitoring relay be used with an Ethernet router?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: While the relay itself is a hardware protection device, its status signals can be integrated into a DCS or AC500 PLC system, which then transmits diagnostic data through an Ethernet router for remote monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the module handle temporary voltage dips?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-217 citation-end-217\"\u003eA: The device features adjustable time delays for overvoltage and undervoltage tripping, allowing it to ignore harmless, momentary voltage fluctuations and prevent nuisance tripping.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the phase sequence monitoring feature mandatory or can it be disabled?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Depending on the specific configuration settings on the front-facing potentiometers, you can set the device to monitor or ignore the phase sequence, depending on whether the connected load is rotation-sensitive.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":45518976155821,"sku":"1SVR730885R3300","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/abb-cm-mps-21s-1svr730885r3300-rms-monitiong-relay-ki2jrlsket3.jpg?v=1766983651","url":"https:\/\/www.maxwellplc.com\/products\/1svr730885r3300-cm-mps-21s-abb-three-phase-rms-monitoring-relay","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}