{"product_id":"siemens-3rw4457-6bc44-soft-starter-900kw-motor-control","title":"Siemens 3RW4457-6BC44 Soft Starter | 900KW Motor Control","description":"\u003ch2\u003eSiemens 3RW4457-6BC44 Soft Starter | Heavy-Duty Motor Control Solution\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePowerful 880A standard current rating for large industrial motors\u003c\/li\u003e\n\u003cli\u003eInside-delta configuration supports up to 1524A, 900KW applications\u003c\/li\u003e\n\u003cli\u003eIntegrated motor protection and thermal monitoring systems\u003c\/li\u003e\n\u003cli\u003eRobust construction for demanding industrial environments\u003c\/li\u003e\n\u003cli\u003eMultiple control options with auxiliary contacts for system integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThis Siemens 3RW4457-6BC44 soft starter delivers smooth acceleration for heavy motors. The unit handles extreme power demands with reliable performance. Built-in protection features safeguard your equipment from damage. Note: This model has been succeeded by the advanced 3RW5 series for new installations.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eProduct Model:\u003c\/strong\u003e 3RW4457-6BC44\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eStarter Type:\u003c\/strong\u003e SIRIUS High-Current Soft Starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eStandard Current:\u003c\/strong\u003e 880A @ 40°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eMax Current:\u003c\/strong\u003e 1524A (Inside-Delta Configuration)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003ePower Rating:\u003c\/strong\u003e 500KW Standard, 900KW Inside-Delta\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eOperating Voltage:\u003c\/strong\u003e 200-460V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eControl Voltage:\u003c\/strong\u003e 230V AC, 50-60Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eInsulation Voltage:\u003c\/strong\u003e 690V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003ePower Loss:\u003c\/strong\u003e 250W typical at full load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eConnection Type:\u003c\/strong\u003e Busbar main, screw control terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eCable Size:\u003c\/strong\u003e 50-240mm² main conductors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eAuxiliary Contacts:\u003c\/strong\u003e 3 NO + 1 Changeover\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eDimensions:\u003c\/strong\u003e 510 x 640 x 290 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eWeight:\u003c\/strong\u003e Approximately 48 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eProtection Class:\u003c\/strong\u003e IP00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #dc2626;\"\u003eOperating Temp:\u003c\/strong\u003e Up to 60°C with derating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Requirements\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eEnsure proper mounting clearances: 100mm top, 75mm bottom\u003c\/li\u003e\n\u003cli\u003eUse appropriate busbar connections for main power\u003c\/li\u003e\n\u003cli\u003eConnect control circuit to 230V AC supply\u003c\/li\u003e\n\u003cli\u003eConfigure motor parameters and protection settings\u003c\/li\u003e\n\u003cli\u003eVerify all connections before power application\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the successor model for this soft starter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe recommended replacement is Siemens 3RW5556-6HA14 from the newer 3RW5 series.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat types of motors work with this starter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt's designed for large three-phase motors in heavy industrial applications like crushers and large pumps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the inside-delta configuration help?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis wiring method allows handling much higher currents for extremely large motor applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat protection features are included?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit provides motor overload protection, thermal monitoring, and adjustable current limitation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this starter operate at high altitudes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, it's rated for installation altitudes up to 5000 meters above sea level.\u003c\/p\u003e\n\u003ch3\u003eOrder Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #059669;\"\u003ePackage Contents:\u003c\/strong\u003e 1 x Siemens 3RW4457-6BC44 Soft Starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #059669;\"\u003eWarranty Protection:\u003c\/strong\u003e 12-month performance guarantee\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #059669;\"\u003eShipping Methods:\u003c\/strong\u003e FedEx, UPS, DHL express available\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":51298929606938,"sku":"3RW4457-6BC44","price":189.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/6240\/4634\/files\/3RW4457-6BC44_2.jpg?v=1762753445","url":"https:\/\/www.ubestplc.com\/sk\/products\/siemens-3rw4457-6bc44-soft-starter-900kw-motor-control","provider":"Ubest Automation Limited","version":"1.0","type":"link"}