{"product_id":"ge-sr489-p5-lo-a20-e-relay-with-5a-ct-4-20ma-analog-io","title":"GE SR489-P5-LO-A20-E Relay with 5A CT \u0026 4-20mA Analog IO","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe GE Multilin SR489-P5-LO-A20-E functions as a high-tier digital management system providing comprehensive protection and monitoring for both synchronous and induction generators. This relay supports frequencies ranging from 25 to 60 Hz, making it compatible with global utility and industrial power standards. By integrating advanced percentage differential protection with extensive thermal monitoring via 12 RTD inputs, the SR489-P5-LO-A20-E prevents catastrophic stator and bearing failures. Its enhanced 40-character LCD serves as a local diagnostic hub, while dual communication ports ensure the seamless flow of telemetry to central SCADA systems.\u003c\/p\u003e\n\u003ch3\u003ePart Number Breakdown\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSR489:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBase Generator Management Relay Series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eP5:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e5 Ampere Phase CT Secondary Input\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLO:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLow Control Power (20–60 VDC or 48–62 VAC)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA20:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFour Isolated 4–20 mA Analog Inputs\/Outputs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnhanced Display with high-visibility 40-character LCD\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eProfessional Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSR489-P5-LO-A20-E\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Input\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 A CT Secondary\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRTD Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12 Channels (Stator, Bearing, Ambient)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAnalog I\/O\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 Isolated 4–20 mA In\/Out\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDigital Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7 Assignable Inputs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Relays\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6 Programmable Relays\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eVoltage Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 VT (Voltage Transformer) Inputs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommunication Protocols\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eModbus RTU, DNP 3.0\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInterface Ports\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 x RS485, 1 x RS232\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFault Data\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e256-Event Log \u0026amp; Oscillographic Capture\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUL, CE, CSA, ANSI\/IEEE\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe SR489-P5-LO-A20-E provides distinct technical solutions for complex power generation environments:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMultivariate Thermal Oversight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 12-channel RTD interface allows the relay to monitor stator windings and bearing temperatures simultaneously. This eliminates the need for separate temperature monitoring hardware and integrates thermal trips directly into the protection logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDeterministic Fault Reconstruction:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrated oscillographic recording captures 12 samples per cycle. This high-resolution data allows engineers to reconstruct the exact millisecond-level sequence of electrical transients during a trip, significantly accelerating root-cause analysis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRedundant SCADA Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDual RS485 ports support simultaneous communication with different master stations. This redundancy ensures that the plant control room maintains visibility even if one communication link suffers a physical failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision Differential Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe relay executes a high-speed percentage differential algorithm to detect internal stator faults. This sensitive detection prevents localized arcing from evolving into a total generator phase-to-phase short circuit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this GE SR489-P5-LO-A20-E unit 100% Brand New?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. We supply the SR489-P5-LO-A20-E in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003econdition. The unit includes the original factory documentation and undergoes rigorous verification to meet ANSI\/IEEE industrial standards.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this model support DNP 3.0 over Ethernet?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \"E\" in this specific configuration refers to the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEnhanced LCD Display\u003c\/strong\u003e, not an Ethernet port. This module utilizes RS485 and RS232 ports to communicate via DNP 3.0 or Modbus RTU protocols. For Ethernet-based DNP3, a separate communications gateway or a different SR489 hardware revision is required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the \"LO\" power option impact installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \"LO\" control power designation permits the unit to operate on low-voltage DC (20–60 V) or AC (48–62 V) stations. This flexibility allows the relay to draw power from standard battery banks or auxiliary station transformers without requiring additional step-down converters.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan the analog I\/Os be used for governor or exciter control?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe four 4–20 mA analog outputs are fully programmable. Engineers typically use them to mirror generator parameters (like kW, kVAR, or Frequency) to external PLC-based governors or excitement systems for coordinated plant control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GE Fanuc","offers":[{"title":"Default Title","offer_id":43817647767651,"sku":"SR489-P5-LO-A20-E","price":370.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/75.2_1ed469ec-5073-4b02-afd8-7fa2eca9f886.jpg?v=1776740952","url":"https:\/\/www.autocontrolglobal.com\/af\/products\/ge-sr489-p5-lo-a20-e-relay-with-5a-ct-4-20ma-analog-io","provider":"AutoControl Global","version":"1.0","type":"link"}