{"product_id":"ge-multilin-489-p5-hi-a20-generator-management-relay","title":"GE Multilin 489-P5-HI-A20 Generator Management Relay","description":"\u003ch2\u003eGE Multilin 489-P5-HI-A20 Generator Management Relay\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE Multilin 489-P5-HI-A20\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e489\u003c\/strong\u003e Generator Management Relay, operates as a dedicated hardware component for generator protection, measurement, and control within GE Multilin generator protection relay platforms.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003eGE Multilin 489-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\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e20 W nominal, 45 W maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Type\u003c\/td\u003e\n\u003ctd\u003eGenerator Management Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e90-300 VDC or 70-265 VAC, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase CT Inputs\u003c\/td\u003e\n\u003ctd\u003e5 A CT secondary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGround CT Inputs\u003c\/td\u003e\n\u003ctd\u003e1 A \/ 5 A selectable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Inputs\u003c\/td\u003e\n\u003ctd\u003e100-240 VAC VT secondary inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Measurement Range\u003c\/td\u003e\n\u003ctd\u003e20.00 Hz to 70.00 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTD Inputs\u003c\/td\u003e\n\u003ctd\u003e12 RTD channels supporting 100 Ohm Platinum, 100 Ohm Nickel, 120 Ohm Nickel, and 10 Ohm Copper sensors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Outputs\u003c\/td\u003e\n\u003ctd\u003e4 isolated 4-20 mA outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Inputs\u003c\/td\u003e\n\u003ctd\u003e8 opto-isolated assignable inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Relays\u003c\/td\u003e\n\u003ctd\u003e6 configurable output relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eRS485 Modbus RTU, RS232 programming port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Interface\u003c\/td\u003e\n\u003ctd\u003e40-character backlit LCD with keypad and status LEDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEvent Recording\u003c\/td\u003e\n\u003ctd\u003eUp to 256 events with fault reports and oscillography capture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProfinet \/ EtherNet-IP Deterministic Networks and Firmware Flash Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe GE Multilin 489-P5-HI-A20 applies microprocessor-based protection processing for generator electrical parameters including current, voltage, frequency, thermal condition, and power flow. The relay performs continuous acquisition from CT, VT, and RTD measurement circuits and executes ANSI protection functions including 87G generator differential, 50\/51 overcurrent, 49 thermal overload, 40 loss of excitation, 32R reverse power, and 81O\/U frequency protection.\u003c\/p\u003e\n\u003cp\u003eThe relay architecture supports firmware-controlled processing, event logging, and communication diagnostics. The device integrates into DCS and SCADA systems through RS485 Modbus RTU communication, while internal firmware compatibility defines supported protection algorithms, measurement functions, and configuration operations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What CT secondary input rating is supported by the GE Multilin 489-P5-HI-A20?\u003cbr\u003eA: The P5 configuration provides 5 A phase CT secondary inputs. Ground CT inputs are field selectable for 1 A or 5 A secondary operation.\u003c\/p\u003e\n\u003cp\u003eQ: Does the relay support direct generator thermal monitoring?\u003cbr\u003eA: Yes. The relay includes 12 RTD inputs and applies thermal modeling functions for stator temperature monitoring and ANSI 49 thermal overload protection.\u003c\/p\u003e\n\u003cp\u003eQ: What communication protocol is available for DCS or SCADA integration?\u003cbr\u003eA: The rear communication interface supports RS485 Modbus RTU for system integration and remote data access.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the GE Multilin 489-P5-HI-A20 in a suitable protective relay cabinet with controlled environmental conditions according to the equipment enclosure requirements.\u003c\/p\u003e\n\u003cp\u003eCT and VT wiring should maintain separation from high-current power conductors to reduce induced noise. CT circuits must use appropriate terminal practices and avoid open-circuit operation during energized conditions.\u003c\/p\u003e\n\u003cp\u003eAnalog output wiring should use shielded instrumentation cable where required. Connect cable shields according to the site grounding standard and avoid multiple-point shield termination that may create ground loops.\u003c\/p\u003e\n\u003cp\u003eRS485 communication wiring should follow industrial serial network practices, including correct polarity, termination arrangement, and separation from switching power cables.\u003c\/p\u003e\n\u003cp\u003eRTD sensor wiring should maintain consistent lead routing and separation from electromagnetic interference sources to preserve temperature measurement accuracy.\u003c\/p\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":44511599460440,"sku":"489-P5-HI-A20","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/489-P5-HI-A203.jpg?v=1786089705","url":"https:\/\/www.industriaxplc.com\/id\/products\/ge-multilin-489-p5-hi-a20-generator-management-relay","provider":"IndustriaX Limited","version":"1.0","type":"link"}