{"product_id":"ge-multilin-sr750-p5-g5-s5-hi-a20-r-t-feeder-protection-relay","title":"GE Multilin SR750-P5-G5-S5-HI-A20-R-T Feeder Protection Relay","description":"\u003ch2\u003eGE Multilin SR750-P5-G5-S5-HI-A20-R-T SR750 Feeder Protection Relay\u003c\/h2\u003e\n\u003cp\u003eConfigured for comprehensive protection, monitoring, and control in utility and industrial power distribution systems, the \u003cstrong\u003eGE Multilin SR750-P5-G5-S5-HI-A20-R-T\u003c\/strong\u003e (\u003cstrong\u003eSR750\u003c\/strong\u003e Feeder Protection Relay) provides direct physical\/electrical execution. The unit accepts 5 A Phase CT, 5 A Ground CT, and 5 A Sensitive Ground CT inputs to drive ANSI 50\/51, 50N\/51N, 50G\/51G, breaker failure, and thermal overload algorithms. Operating across an AC\/DC universal power supply range of 88-300 VDC or 70-265 VAC, the relay processes virtual inputs and programmable logic while streaming event records, waveform captures, and diagnostics via Modbus RTU\/TCP, DNP3.0, or IEC 60870-5-103 protocols.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSR750\u003c\/strong\u003e: Base Series designation for the Multilin SR750 Feeder Protection System.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP5\u003c\/strong\u003e: Phase CT Secondary rating configured for 5 A inputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG5\u003c\/strong\u003e: Ground CT Secondary rating configured for 5 A inputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS5\u003c\/strong\u003e: Sensitive Ground CT Secondary rating configured for 5 A inputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHI\u003c\/strong\u003e: Universal High-Power Supply range rated for 88-300 VDC and 70-265 VAC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA20\u003c\/strong\u003e: Hardware revision and options package incorporating 4-20 mA analog outputs and enhanced hardware options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR\u003c\/strong\u003e: Rear-mount terminal connections for panel cutout installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT\u003c\/strong\u003e: Enhanced Ethernet communication and transient recording feature code.\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\u003eSR750-P5-G5-S5-HI-A20-R-T\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\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e220 mm x 180 mm x 200 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e88-300 VDC \/ 70-265 VAC universal supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Inputs\u003c\/td\u003e\n\u003ctd\u003e5 A Phase CT (P5), 5 A Ground CT (G5), 5 A Sensitive Ground CT (S5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Elements\u003c\/td\u003e\n\u003ctd\u003eANSI 50\/51, 50N\/51N, 50G\/51G, breaker failure, thermal overload, voltage\/frequency\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Features\u003c\/td\u003e\n\u003ctd\u003eBreaker control interlocks, high-speed trip\/alarm relays, programmable virtual logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Interfaces\u003c\/td\u003e\n\u003ctd\u003eEthernet, Modbus RTU\/TCP, DNP3.0, IEC 60870-5-103\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMC \u0026amp; Immunity\u003c\/td\u003e\n\u003ctd\u003eCompliance per IEC 61000 specifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity and Firmware Flash Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe GE Multilin SR750-P5-G5-S5-HI-A20-R-T manages internal backplane bus communication velocity during high-density trip execution sequences. Internal microprocessors preserve firmware flash compatibility while processing real-time current vectors, virtual logic state changes, and automated breaker interlocks. By maintaining deterministic network isolation between local protective elements and external Ethernet SCADA polling, the hardware prevents processing latencies during fault-triggered waveform capture and event logging.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the SR750-P5-G5-S5-HI-A20-R-T handle primary current transformer sizing for ground fault detection?\u003c\/p\u003e\n\u003cp\u003eA: The module includes dedicated 5 A inputs for Phase CT (P5), Ground CT (G5), and Sensitive Ground CT (S5) channels, allowing independent scaling for standard overcurrent and high-sensitivity ground fault detection.\u003c\/p\u003e\n\u003cp\u003eQ: What power source range is compatible with the \"HI\" power supply option?\u003c\/p\u003e\n\u003cp\u003eA: The \"HI\" universal power supply operates seamlessly on either DC auxiliary power from 88 VDC to 300 VDC or AC auxiliary power from 70 VAC to 265 VAC.\u003c\/p\u003e\n\u003cp\u003eQ: How does the hardware maintain real-time telemetry during local network outages?\u003c\/p\u003e\n\u003cp\u003eA: The relay writes timestamped event records and high-speed waveform data directly to non-volatile internal memory, allowing full diagnostic retrieval over Modbus or DNP3.0 once network connection resumes.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eField engineers and wiring technicians must adhere to the following installation rules during cabinet mounting:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInsert the 220 mm x 180 mm x 200 mm case into the standard panel cutout, securing the rear chassis mounting brackets to maintain mechanical stability.\u003c\/li\u003e\n\u003cli\u003eConnect the auxiliary power conductors to the HI terminals, verifying supply voltage falls within the 88-300 VDC or 70-265 VAC operating range.\u003c\/li\u003e\n\u003cli\u003eRoute Phase, Ground, and Sensitive Ground CT 5 A secondary wiring through dedicated shorting terminal blocks before terminating on the relay rear panel.\u003c\/li\u003e\n\u003cli\u003eConnect a heavy-gauge copper grounding wire from the panel frame ground directly to the relay ground lug to satisfy IEC 61000 EMC immunity standards.\u003c\/li\u003e\n\u003cli\u003eLay Ethernet communication cables in separate wireways isolated from 5 A current input circuits to mitigate electromagnetic interference.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GE Fanuc","offers":[{"title":"Default Title","offer_id":43871070126179,"sku":"SR750-P5-G5-S5-HI-A20-R-T","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/168_9a4c2279-1bfb-44e7-bc08-d456ab421f14.jpg?v=1764834074","url":"https:\/\/www.autocontrolglobal.com\/products\/ge-multilin-sr750-p5-g5-s5-hi-a20-r-t-feeder-protection-relay","provider":"AutoControl Global","version":"1.0","type":"link"}