{"product_id":"ge-multilin-sr489-p1-lo-a20-e-generator-protection-system","title":"GE Multilin SR489-P1-LO-A20-E Generator Protection System","description":"\u003cp\u003eThe \u003cstrong\u003eGE Multilin SR489-P1-LO-A20-E\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eSR489\u003c\/strong\u003e Generator Protection System, operates as a dedicated hardware component for protection, control, and advanced communications within electrical monitoring and metering loops.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSR489:\u003c\/strong\u003e Designates the standard SR family of generator protection relays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP1:\u003c\/strong\u003e Indicates a 1 A phase current transformer (CT) secondary input configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLO:\u003c\/strong\u003e Specifies the low-range power supply option, rating at 24 - 60 VDC or 20 - 48 VAC at 48 - 62 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA20:\u003c\/strong\u003e Controls the integrated analog output matrix configured for 4 - 20 mA operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eE:\u003c\/strong\u003e Identifies the enhanced physical display variant featuring a larger LCD interface and improved mechanical keypad.\u003c\/li\u003e\n\u003c\/ul\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-P1-LO-A20-E\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e5 kg (Shipping Weight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard SR family chassis parameters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard industrial operating range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 - 60 VDC \/ 20 - 48 VAC at 48 - 62 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Input\u003c\/td\u003e\n\u003ctd\u003e1 A phase CT secondaries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Outputs\u003c\/td\u003e\n\u003ctd\u003e4 - 20 mA loops\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Interface\u003c\/td\u003e\n\u003ctd\u003eEnhanced display with larger LCD and improved keypad\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control and Driver Integration\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware Flash Compatibility:\u003c\/strong\u003e Internal microprocessor architectures execute real-time current phase vectors and diagnostic parameters, logging variables directly into volatile and non-volatile registry regions that correlate with baseline configuration revisions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\/O Density Scaling:\u003c\/strong\u003e The 4 - 20 mA analog output array provides scaling functionality to replicate physical process metrics directly into external PLC or DCS controller input boards without transmission lag.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What are the absolute voltage constraints for the logic power supply configuration on this hardware? A: The \"LO\" power supply hardware option requires input thresholds strictly constrained to 24 - 60 VDC or 20 - 48 VAC within a frequency bandwidth of 48 - 62 Hz. Exceeding these limits will cause hardware degradation.\u003c\/p\u003e\n\u003cp\u003eQ: Can standard 5 A secondary current transformers be wired directly to this unit? A: No. The \"P1\" designation limits the current input processing hardware specifically to 1 A phase CT secondaries. Direct injection of a 5 A secondary signal will oversaturate the input transformers and potentially compromise the protection loops.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Transformer Termination:\u003c\/strong\u003e Ensure all 1 A phase CT secondary wiring is securely fastened to the terminal block using industrial crimp lugs. Open-circuiting active CT secondary loops under load conditions generates high-voltage transients that present severe safety hazards and hardware breakdown risks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Interface Isolation:\u003c\/strong\u003e Route the 4 - 20 mA analog output cables in dedicated low-voltage instrument raceways. Keep these paths physically isolated from AC power conductors to prevent electrical noise induction from distorting telemetry transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Grounding Sequence:\u003c\/strong\u003e Prior to applying auxiliary power to the unit, attach a dedicated, low-impedance copper conductor from the chassis ground terminal directly to the master electrical cabinet grounding busbar to establish static discharge protection.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GE","offers":[{"title":"Default Title","offer_id":45256546615411,"sku":"SR489-P1-LO-A20-E","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/MMII-PD-1-2-240_2_cb3fda2f-8356-46f5-8ece-b67346e61b2c.png?v=1784256150","url":"https:\/\/www.dcssupplier.com\/ar\/products\/ge-multilin-sr489-p1-lo-a20-e-generator-protection-system","provider":"DcsSupplier Limited","version":"1.0","type":"link"}