{"product_id":"siemens-3rw4447-6bc44-sirius-soft-starter-432a","title":"Siemens 3RW4447-6BC44 - SIRIUS Soft Starter 432A","description":"\u003ch2\u003eSiemens SIRIUS 3RW4447-6BC44 Soft Starter\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e3RW4447-6BC44\u003c\/strong\u003e represents Siemens' advanced motor control technology for industrial applications. This SIRIUS soft starter delivers smooth acceleration and deceleration for three-phase motors. It significantly reduces mechanical stress and extends equipment lifespan.\u003c\/p\u003e\n\u003ch3\u003eCore Technical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Siemens\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e3RW4447-6BC44\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Line:\u003c\/strong\u003e SIRIUS Soft Starters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Current:\u003c\/strong\u003e 432A @ 40°C standard circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside-Delta Current:\u003c\/strong\u003e 748A @ 40°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Power:\u003c\/strong\u003e 250kW standard, 400kW inside-delta\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 200-460V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Voltage:\u003c\/strong\u003e 230V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Range:\u003c\/strong\u003e 50-60Hz ±10%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 432 x 348 x 366 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 11.53 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class:\u003c\/strong\u003e IP00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Temperature:\u003c\/strong\u003e -25°C to +60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Height:\u003c\/strong\u003e Up to 5000 meters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003c\/strong\u003e Maximum 500 meters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerformance Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe starter provides adjustable current limitation from 86A to 432A.\u003c\/li\u003e\n\u003cli\u003eIt features integrated thermal motor overload protection with PTC evaluation.\u003c\/li\u003e\n\u003cli\u003eBuilt-in thyristors ensure reliable power control and smooth operation.\u003c\/li\u003e\n\u003cli\u003eThe device offers 115% continuous operating current capability at 40°C.\u003c\/li\u003e\n\u003cli\u003eAutomatic internal bypass contact reduces power loss during run state.\u003c\/li\u003e\n\u003cli\u003eThree normally open and one changeover auxiliary contacts enable control.\u003c\/li\u003e\n\u003cli\u003eLED display provides clear fault indication and status monitoring.\u003c\/li\u003e\n\u003cli\u003eExternal reset capability allows for remote system initialization.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical Connections \u0026amp; Installation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMain circuit connections utilize robust busbar termination system.\u003c\/li\u003e\n\u003cli\u003eFront terminals accept 70-240mm² fine-stranded cables with ferrules.\u003c\/li\u003e\n\u003cli\u003eRear terminals accommodate 120-185mm² cables for flexible wiring.\u003c\/li\u003e\n\u003cli\u003eCombined clamping points handle up to 2x185mm² parallel conductors.\u003c\/li\u003e\n\u003cli\u003eAuxiliary circuits use screw terminals for 0.5-2.5mm² conductors.\u003c\/li\u003e\n\u003cli\u003eMaintain 100mm clearance above unit and 75mm below for ventilation.\u003c\/li\u003e\n\u003cli\u003eSide clearance of 5mm ensures proper air circulation and heat dissipation.\u003c\/li\u003e\n\u003cli\u003eMounting position allows ±90° rotation and ±22.5° forward\/backward tilt.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMotor Power Ratings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStandard circuit delivers 250kW at 400V for three-phase motors.\u003c\/li\u003e\n\u003cli\u003eInside-delta configuration provides 400kW at 400V operation.\u003c\/li\u003e\n\u003cli\u003eAt 230V standard circuit, output power reaches 132kW.\u003c\/li\u003e\n\u003cli\u003eHorsepower ratings range from 125HP to 600HP depending on configuration.\u003c\/li\u003e\n\u003cli\u003eThe starter handles minimum motor loads as low as 8% of rated current.\u003c\/li\u003e\n\u003cli\u003ePower loss during operation typically measures only 232 watts.\u003c\/li\u003e\n\u003cli\u003eDerating begins at 40°C ambient temperature for optimal performance.\u003c\/li\u003e\n\u003cli\u003eCurrent capacity decreases to 385A at 50°C and 335A at 60°C.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProtection \u0026amp; Safety Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIntegrated electronic overload protection prevents motor damage.\u003c\/li\u003e\n\u003cli\u003eThermal resistor monitoring provides additional motor protection.\u003c\/li\u003e\n\u003cli\u003ePhase failure detection ensures three-phase operation integrity.\u003c\/li\u003e\n\u003cli\u003eCurrent imbalance protection safeguards against uneven loading.\u003c\/li\u003e\n\u003cli\u003eShort-circuit protection built into the power electronics section.\u003c\/li\u003e\n\u003cli\u003eUndervoltage and overvoltage protection maintains system stability.\u003c\/li\u003e\n\u003cli\u003eEarth fault detection available through additional monitoring systems.\u003c\/li\u003e\n\u003cli\u003eUL\/CSA certifications ensure compliance with international standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackaging \u0026amp; Shipping\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEach unit ships in protective packaging with adequate cushioning.\u003c\/li\u003e\n\u003cli\u003ePackage includes one soft starter unit ready for installation.\u003c\/li\u003e\n\u003cli\u003eWe ship worldwide via FedEx, UPS, and DHL express services.\u003c\/li\u003e\n\u003cli\u003eTracking information becomes available immediately after dispatch.\u003c\/li\u003e\n\u003cli\u003eAll products include comprehensive 12-month warranty coverage.\u003c\/li\u003e\n\u003cli\u003eMost orders process within 24 hours of payment confirmation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProfessional Technical FAQ\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat is the difference between standard and inside-delta connection?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eInside-delta connection allows higher current handling up to 748A for larger motors.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCan this soft starter operate at high altitude locations?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eYes, it maintains full performance up to 5000 meters above sea level.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWhat type of motor protection does this unit provide?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eIt includes electronic overload, thermal monitoring, and phase failure protection.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHow many auxiliary contacts are available for control circuits?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eThe unit provides three NO contacts and one changeover contact for signaling.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWhat is the recommended derating above 40°C ambient temperature?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eCurrent capacity reduces to 385A at 50°C and 335A at 60°C for safe operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e© 2025 Ubest Automation Limited. All rights reserved.\u003cbr\u003eOriginal Source: \u003ca href=\"https:\/\/www.ubestplc.com\/\"\u003ehttps:\/\/www.ubestplc.com\/\u003c\/a\u003e\u003cbr\u003eContact: \u003ca href=\"mailto:sales@ubestplc.com\"\u003esales@ubestplc.com\u003c\/a\u003e Phone: \u003ca href=\"https:\/\/wa.me\/8618030005825\"\u003e+86 180 3000 5825\u003c\/a\u003e\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51248092643610,"sku":"3RW5547-6HA14","price":157.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/6240\/4634\/files\/3RW5547-6HA14.jpg?v=1761267111","url":"https:\/\/www.ubestplc.com\/es\/products\/siemens-3rw4447-6bc44-sirius-soft-starter-432a","provider":"Ubest Automation Limited","version":"1.0","type":"link"}