{"product_id":"st31m3-series-intelligent-mccb-trip-unit","title":"ST31M3 Series Intelligent MCCB Trip Unit","description":"\u003ch2\u003eST31M3 Series – Intelligent MCCB Trip Unit\u003c\/h2\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe ST31M3 Series is an intelligent protection core unit designed for use with CM1 and CM3 series molded case circuit breakers (MCCB). It provides comprehensive distribution protection, safeguarding circuits and power equipment against overload, short-circuit, and ground fault hazards.\u003c\/p\u003e\u003ch3\u003eProtection Functions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLong-time overload protection\u003c\/li\u003e\n\u003cli\u003eShort-time short-circuit protection\u003c\/li\u003e\n\u003cli\u003eInstantaneous short-circuit protection\u003c\/li\u003e\n\u003cli\u003eGround fault protection\u003c\/li\u003e\n\u003cli\u003eOverload pre-alarm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAuxiliary Functions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFault trip\u003c\/li\u003e\n\u003cli\u003eOverload pre-alarm\u003c\/li\u003e\n\u003cli\u003eGround fault alarm\u003c\/li\u003e\n\u003cli\u003eOverload alarm without trip\u003c\/li\u003e\n\u003cli\u003eRemote shunt trip\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommunication\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMODBUS protocol\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eUser Interface\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePower indicator\u003c\/li\u003e\n\u003cli\u003ePre-alarm indicator\u003c\/li\u003e\n\u003cli\u003eTrip function test port\u003c\/li\u003e\n\u003cli\u003eUSB communication port\u003c\/li\u003e\n\u003cli\u003eAccessory communication port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM-type:\u003c\/strong\u003e Parameters set via rotary switch – intuitive and convenient\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eH-type:\u003c\/strong\u003e Parameters set via handheld programmer; supports measurement accuracy calibration and historical fault inquiry\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRated Parameters\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply:\u003c\/strong\u003e CT self-powered; operates when 3-phase current \u0026gt; 0.2In or single-phase current \u0026gt; 0.4In\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame rating:\u003c\/strong\u003e 100A, 250A, 400–630A, 800A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated current:\u003c\/strong\u003e 32A – 800A\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eStandards\u003c\/h3\u003e\u003cp\u003eGB14048.2  |  IEC60947  |  GB\/T22710\u003c\/p\u003e","brand":"Wan Long Electric Group Co., Ltd.","offers":[{"title":"Default Title","offer_id":44010303520834,"sku":null,"price":98.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0688\/1221\/0242\/files\/ST31M3.webp?v=1784012815","url":"https:\/\/wanlongelectric.com\/products\/st31m3-series-intelligent-mccb-trip-unit","provider":"Wan Long Electric Group Co., Ltd.","version":"1.0","type":"link"}