{"product_id":"ge-sr750-feeder-management-relay","title":"GE SR750 Feeder Management Relay","description":"\u003cp\u003eThe \u003cstrong\u003eGE Fanuc SR750\u003c\/strong\u003e, operates as a dedicated hardware component for the digital protection, control, algorithmic metering, and automated monitoring of electrical distribution feeders within GE Multilin 750\/760 series power setups.\u003c\/p\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE Fanuc \/ Multilin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCanada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e8.50 lbs (3.85 kg) nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e222 mm x 216 mm x 302 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Input (Low Range Configuration)\u003c\/td\u003e\n\u003ctd\u003e20-60 VDC; 20-48 VAC at 48-62 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Input (High Range Configuration)\u003c\/td\u003e\n\u003ctd\u003e88-300 VDC; 70-265 VAC at 48-62 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase Current Current Transformer (CT) Inputs\u003c\/td\u003e\n\u003ctd\u003e1 A or 5 A secondary scaling options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGround Current CT Inputs\u003c\/td\u003e\n\u003ctd\u003e1 A or 5 A secondary scaling options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitive Ground CT Inputs\u003c\/td\u003e\n\u003ctd\u003e1 A or 5 A secondary scaling options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Output Signal Options\u003c\/td\u003e\n\u003ctd\u003e0-1 mA, 0-5 mA, 0-10 mA, or 4-20 mA DC loops\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreaker Status HMI Indication\u003c\/td\u003e\n\u003ctd\u003eConfigurable Red or Green \"Breaker Closed\" LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Protection Profiles\u003c\/td\u003e\n\u003ctd\u003eOvercurrent, ground fault, directional overcurrent, voltage, frequency, auto-reclosing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Control Interfaces\u003c\/td\u003e\n\u003ctd\u003eManual or automated circuit breaker trip\/close coils; local\/remote logic shifting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Metering Capabilities\u003c\/td\u003e\n\u003ctd\u003eTrue RMS current, voltage, real\/reactive power, total energy, power factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control and Networks\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Communication Velocity:\u003c\/strong\u003e The relay logic controller executes internal sampling and protection algorithms within deterministic clock periods. This high-speed backplane execution ensures that fault detection parameters sub-sequence to trip output relays within milliseconds of an overcurrent event, preserving grid stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\/O Density Scaling:\u003c\/strong\u003e The module integrates three-phase current transformer inputs, zero-sequence ground inputs, auxiliary potential transformer voltage inputs, and programmable digital contacts into a single high-density chassis footprint. This arrangement collapses multiple discrete protection disks into one panel cut-out, dropping wireway density.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware Flash Compatibility:\u003c\/strong\u003e Core tripping curves, network configuration parameters, and Modbus memory maps reside in non-volatile flash memory sectors. The internal firmware revision must align with the active EnerVista or setup software baseline to prevent parameter upload blocks or synchronization failures during settings file transmission.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the SR750 manage control switching logic during a local\/remote state transition?\u003c\/p\u003e\n\u003cp\u003eA: The relay incorporates a dedicated hardware-interlocked command state machine. When the local\/remote state is set to local, the firmware drops software-initiated trip\/close commands from the Ethernet or serial SCADA network, preventing accidental remote operations while field technicians are actively servicing the breaker cubicle.\u003c\/p\u003e\n\u003cp\u003eQ: What are the engineering consequences to the active protection curves if the auxiliary power supply encounters a line sag below minimum thresholds?\u003c\/p\u003e\n\u003cp\u003eA: The internal power supply board relies on internal capacitive storage banks to ride through brief voltage sags. If the supply voltage drops below the absolute minimum operational baseline (e.g., below 20 VDC on low-range units), the hardware watchdog relay immediately drops out, forcing a safe-state alert contact to close and disabling the trip outputs to prevent erratic, unmanaged relay behaviors.\u003c\/p\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":47616270303422,"sku":"SR750","price":620.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-06-09_16-06-26.png?v=1780995026","url":"https:\/\/www.autooiltech.com\/products\/ge-sr750-feeder-management-relay","provider":"AutoOilTech Limited","version":"1.0","type":"link"}