{"product_id":"sr489-p5-hi-a20-ge-multilin-generator-relay","title":"SR489-P5-HI-A20 GE Multilin Generator Relay","description":"\u003cp\u003eThe \u003cstrong\u003eGE Multilin SR489-P5-HI-A20\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eSR489-P5-HI-A20\u003c\/strong\u003e Generator Management Relay, serves as the primary \u003cstrong\u003eSR489\u003c\/strong\u003e Generator Management Relay utilized to execute generator protection and monitoring sequences across induction and synchronous generator networks.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSR489-P5-HI-A20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE Multilin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003e489 Generator Management Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCanada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.27 kg (5.00 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 19-inch rack \/ draw-out chassis footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Input Configuration\u003c\/td\u003e\n\u003ctd\u003e5 A phase CT secondaries (P5 specification)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply Control Input\u003c\/td\u003e\n\u003ctd\u003e90-300 V DC \/ 70-265 V AC at 48\/62 Hz (HI option)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Output Subsystem\u003c\/td\u003e\n\u003ctd\u003eEight 4-20 mA analog outputs (A20 specification)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Interface Type\u003c\/td\u003e\n\u003ctd\u003eBasic display configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePower Protection Matrix and Signal Execution\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Transformer Sensing and Calibration\u003c\/strong\u003e The module incorporates physical phase sensing transformers optimized for 5 A current transformer secondary loops. This P5 hardware tier monitors high-resolution alternate current waveforms from three-phase generation outputs, feeding the internal processing blocks to perform real-time digital calculations for stator thermal protection, phase differentials, and unbalance mitigation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal High-Voltage Power Stage\u003c\/strong\u003e Engineered with the universal HI power supply architecture, the device accepts wide operational inputs spanning 90-300 V DC or 70-265 V AC at line frequencies of 48\/62 Hz. The internal circuit topology isolates delicate central processing units from incoming line transients, maintaining system uptime during critical plant grid faults or sudden DC battery bank dropouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Density Analog Output Mapping\u003c\/strong\u003e The hardware block features eight field-assignable 4-20 mA analog outputs. These channels act as true current sources that scale with monitored internal registers, streaming variables such as real power, reactive power, voltage, and phase current directly to supervisory SCADA frameworks and distributed control system (DCS) nodes.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":47618382659774,"sku":"SR489-P5-HI-A20","price":620.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-06-10_10-32-07_29639753-9bff-49d5-8ede-813da6c2951a.png?v=1781060997","url":"https:\/\/www.autooiltech.com\/products\/sr489-p5-hi-a20-ge-multilin-generator-relay","provider":"AutoOilTech Limited","version":"1.0","type":"link"}