{"product_id":"ge-489-p5-lo-a20-e-generator-management-relay","title":"GE 489-P5-LO-A20-E Generator Management Relay","description":"\u003cp\u003eThe \u003cstrong\u003eGE Multilin 489-P5-LO-A20-E\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e489-P5-LO-A20-E\u003c\/strong\u003e Generator Management Relay, operates as a dedicated hardware component for generator protection and monitoring execution within induction and synchronous generator systems.\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\u003e489-P5-LO-A20-E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE Multilin \/ GE Grid Solutions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003e489 Generator Management Relays (SR Family)\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\u003e4.54 kg (10 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e20-60 VDC or 20-48 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e25, 50, or 60 Hz nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Type\u003c\/td\u003e\n\u003ctd\u003eEnhanced 40-character display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePollution Degree\u003c\/td\u003e\n\u003ctd\u003eII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual Order Code\u003c\/td\u003e\n\u003ctd\u003eGEK-106494L (Part # 1601-0150-AC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis Option\u003c\/td\u003e\n\u003ctd\u003eDraw Out Case (if specified on procurement)\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\u003eAnalog and Transducer Measurement Array\u003c\/strong\u003e The rear termination plane integrates twelve field-programmable RTD inputs alongside four isolated 4-20 mA analog inputs and four matching 4-20 mA outputs. These channels gather auxiliary thermal and mechanical data parameters while seven Current Transformer (CT) inputs execute three-phase, neutral, and ground current sensing loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommunication and Time Synchronization Logic\u003c\/strong\u003e The hardware framework includes two RS485 peripheral communication ports operating up to 19200 bps and an independent front-panel RS232 engineering station link. The platform executes ModbusRTU and DNP 3.0 protocols with programmable parity (None, Odd, Even) while accepting IRIG-B amplitude-modulated signals at 2.5 to 6.0 Vpk-pk for clock synchronization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Elements and Control Output Relays\u003c\/strong\u003e High-set phase overcurrent elements generate direct trip signals paired with voltage restraint features using fixed programmable characteristics. The execution logic controls six onboard output relays and incorporates tachometer functions assignable to digital inputs 4 through 7, while managing low forward power delays from 0.2 to 120.0 seconds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How do the digital and analog inputs maintain operation under high electrical noise levels?\u003c\/p\u003e\n\u003cp\u003eA: All integrated back-panel inputs conform to Surge Withstand Capability (SWC) and C37.990 EMI\/RFI interference immunity specifications. The module layout routes these input networks through an independent, dedicated safety and filter ground grid that diverts transient high-frequency ambient noise away from the logic boards.\u003c\/p\u003e\n\u003cp\u003eQ: Is a connected engineering terminal required to modify active setpoint values?\u003c\/p\u003e\n\u003cp\u003eA: No. The integrated user interface permits standalone device management via a front-panel numeric keypad and a 40-character display layer. Operators can navigate submenus, adjust timing values, and input local configurations using the dedicated menu keys without attaching an external computer.\u003c\/p\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":47618382233790,"sku":"489-P5-LO-A20-E","price":620.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-06-08_09-54-20_16a90ffc-1c9f-4815-8811-106507c93c56.png?v=1781060921","url":"https:\/\/www.autooiltech.com\/products\/ge-489-p5-lo-a20-e-generator-management-relay","provider":"AutoOilTech Limited","version":"1.0","type":"link"}