{"product_id":"ge-multilin-sr489-p5-hi-a20-generator-management-relay","title":"GE Multilin SR489-P5-HI-A20 Generator Management Relay","description":"\u003ch2\u003eGE Multilin SR489-P5-HI-A20 Generator Management Relay\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE Multilin SR489-P5-HI-A20\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eSR489\u003c\/strong\u003e Generator Management Relay, operates as a dedicated hardware component for generator protection, metering, monitoring, and control within GE Multilin 489 Generator Management 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\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eGeneral Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eCompact drawout relay case; dimensions not specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eOperating temperature not specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eTypical 15 W, Maximum 35 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eGenerator Protection Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e70-265 VAC (48-62 Hz) \/ 88-300 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Inputs\u003c\/td\u003e\n\u003ctd\u003e5 A secondary phase current inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Input Frequency Range\u003c\/td\u003e\n\u003ctd\u003e20 Hz to 70 Hz tracking range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Input Burden\u003c\/td\u003e\n\u003ctd\u003eLess than 0.2 ohm at 5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Withstand\u003c\/td\u003e\n\u003ctd\u003eContinuous 10 A; 1 second 500 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Inputs\u003c\/td\u003e\n\u003ctd\u003e50 V to 240 V AC phase-to-neutral direct or VT connected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Outputs\u003c\/td\u003e\n\u003ctd\u003e4 programmable 4-20 mA DC outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Output Load\u003c\/td\u003e\n\u003ctd\u003eMaximum 1200 ohm at 24 VDC external loop or internal supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003e2 x RS485 ports with Modbus RTU protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Baud Rate\u003c\/td\u003e\n\u003ctd\u003eUp to 19,200 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront Panel Interface\u003c\/td\u003e\n\u003ctd\u003e40-character backlit display, LED status indicators, programming keypad\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmissions Compliance\u003c\/td\u003e\n\u003ctd\u003eClass A radiated and conducted emissions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRF Immunity\u003c\/td\u003e\n\u003ctd\u003eLevel 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eGE Multilin Generator Protection Processing and Control Functions\u003c\/h3\u003e\n\u003cp\u003eThe SR489-P5-HI-A20 applies microprocessor-based numerical processing for generator electrical protection functions. The relay supports phase current measurement through 5 A secondary CT inputs and voltage measurement through VT secondary inputs. Protection elements include phase overcurrent, ground overcurrent, phase differential, and loss of excitation impedance functions.\u003c\/p\u003e\n\u003cp\u003eThe relay supports configurable ground overcurrent curves including ANSI, IEC, IAC, Flexcurve, and definite time characteristics. Loss of excitation protection is implemented with two impedance zones using impedance circles for generator field monitoring. High set phase overcurrent timing accuracy is specified as +\/-50 ms at 50\/60 Hz or +\/-0.5% total time.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the SR489-P5-HI-A20 support hot-swapping during operation?\u003cbr\u003eA: The relay is installed in a drawout case configuration. Hot-swap capability is not specified in the provided technical data; isolation and controlled removal procedures should be followed during maintenance.\u003c\/p\u003e\n\u003cp\u003eQ: What communication interfaces are available on the SR489-P5-HI-A20?\u003cbr\u003eA: The relay provides two RS485 serial communication ports using Modbus RTU protocol with baud rates up to 19,200 bps.\u003c\/p\u003e\n\u003cp\u003eQ: What analog output configuration is provided by the A20 option?\u003cbr\u003eA: The A20 option provides four programmable 4-20 mA DC analog outputs for external monitoring and control circuits.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the SR489-P5-HI-A20 in the designated relay mounting assembly with appropriate mechanical retention of the drawout case. Verify CT secondary wiring polarity and terminal integrity before energizing the protection circuit.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between current transformer wiring, voltage transformer wiring, communication cables, and high-energy conductors to reduce electrical interference. RS485 communication wiring should use shielded twisted-pair cable with the shield connected according to the plant grounding practice.\u003c\/p\u003e\n\u003cp\u003eConfirm the control power supply matches the HI option input range before connection. Protective grounding, panel bonding, and enclosure wiring should comply with the applicable industrial electrical installation standards.\u003c\/p\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":44511604080728,"sku":"SR489-P5-HI-A20","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/SR489-P5-LO-A20.jpg?v=1786090189","url":"https:\/\/www.industriaxplc.com\/ar\/products\/ge-multilin-sr489-p5-hi-a20-generator-management-relay","provider":"IndustriaX Limited","version":"1.0","type":"link"}