{"product_id":"abb-ret316-4-hesg448750m2-numerical-transformer-protection-relay","title":"ABB RET316*4 HESG448750M2 Numerical Transformer Protection Relay","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4 (HESG448750M2)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-performance numerical relay designed for the protection, monitoring, and control of power transformers. Part of ABB’s 316 series, this relay provides reliable, fast, and selective protection for two-winding and three-winding transformers, including autotransformers and generator-transformer units. Advanced digital signal processing (DSP) ensures accurate fault detection and immunity against inrush currents or external disturbances.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eABB\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOrder Number:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHESG448750M2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNumerical Transformer Protection Relay\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Supply:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e24 V DC standard, 110–240 V AC\/DC variants available\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e-20°C to +55°C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIngress Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIP20 (standard), IP54 front panel optional\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHorizontal or vertical, derating may apply\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions (HxWxD):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e135 × 67.5 × 28 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1.5 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUser Interface:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCAP2\/316 software, menu-driven, Windows-compatible\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCommunication Protocols:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIEC 61850, IEC 60870-5-103, Modbus®, DNP3, Profibus DPV1 (via SPA-ZC 302)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInterfaces:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3 serial ports for local PC, station control system, and process bus\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDifferential Protection (87T):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFast, selective tripping for internal faults with inrush restraint.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRestricted Earth Fault (REF):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDetects sensitive internal ground faults near transformer neutral.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOvercurrent \u0026amp; Earth Fault:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMulti-stage protection with directional and non-directional options.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Overload Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMonitors transformer winding heating to prevent insulation damage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOver-excitation (V\/Hz):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSafeguards transformer core during voltage or frequency excursions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced Logic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMulti-layer programmable logic with timers, flip-flops, and custom schemes via PCM600.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed Operation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTypical differential trip times under 25 ms for immediate fault clearance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelf-Monitoring:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eContinuous internal diagnostics for reliability and operational readiness.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eData Logging:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEvent and disturbance recording for post-fault analysis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSubstations:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProtection of medium and high-voltage transformers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Plants:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGenerator-transformer protection for reliable energy delivery.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIndustrial Power Systems:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSafeguarding autotransformers and critical distribution transformers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIs the relay suitable for three-winding transformers?\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRET316*4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprotects two-winding and three-winding transformers, including generator-transformer blocks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCan it communicate with modern substation protocols?\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes, supports IEC 61850, Modbus®, DNP3, IEC 60870-5-103, and Profibus DPV1.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHow does it handle inrush currents during transformer energization?\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBuilt-in inrush restraint logic ensures stable operation without false trips.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":44114266161251,"sku":"RET316*4 HESG448750M2","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/308ec23709872bfbfd2a2b975b121008.jpg?v=1776076885","url":"https:\/\/precisemodule.com\/products\/abb-ret316-4-hesg448750m2-numerical-transformer-protection-relay","provider":"Precise Module Ltd.","version":"1.0","type":"link"}