GE Multilin SR750-P1-G1-S1-HI-A20-R-E-H Feeder Management Relay

Description

Technical Specifications

Electrical Specifications

• Phase Current Input: P1 = 1 A (1A nominal phase CT secondary current)
• Ground Current Input: G1 = 1 A (1A nominal ground fault current input)
• Sensitive Ground Current Input: S1 = 1 A (1A nominal sensitive ground fault current input)
• Control Power Supply: HI = 90–300 VDC / 70–265 VAC @ 48–62 Hz (universal wide‑range high‑voltage power)
• Voltage Inputs: 3‑phase voltage inputs (50–240 V nominal) for bus/line voltage monitoring
• Digital Inputs: 8 opto‑isolated, programmable digital inputs for breaker status, remote control, and status signaling
• Relay Outputs: 8 configurable Form A/C relay outputs for tripping, alarming, control, and signaling functions
• Analog Outputs: 4 programmable 4–20 mA / 0–20 mA analog channels for metering and process signaling
• Communication Ports: RS‑232 (front), RS‑485/RS‑422 (rear); supports optional Ethernet (Modbus TCP/IP, DNP3), Profibus, and IEC 61850
• Measurement Accuracy: Current ±1% FS; voltage ±0.25% FS; power ±0.5% FS; frequency ±0.1% FS
• Relay Operating Time: ≤ 1 cycle (≤ 16.6 ms @ 60 Hz) for main protection elements
• Overload Withstand: 1 second at 40 × rated current; continuous operation at 2 × rated current
• Frequency Range: 25–60 Hz nominal (frequency tracking 16–65 Hz)
• Burden: < 0.025 VA at 120 V for voltage inputs

Environmental & Physical Specifications

• Operating Temperature: -25°C to +70°C (-13°F to +158°F)
• Storage Temperature: -40°C to +85°C (-40°F to +185°F)
• Relative Humidity: Up to 90% (non‑condensing)
• Pollution Degree: 2
• Ingress Protection: IP40 (front panel)
• Dimensions: 7” W × 6.5” D × 8.5” H (177.8 mm × 165.1 mm × 215.9 mm)
• Weight: Approximately 7.9 kg (17.4 lbs)
• Mounting: Panel‑mount with draw‑out chassis design (R)
• Display: 40‑character backlit LCD with keypad and 20 status LEDs (A20 enhanced display)
• Certifications: Compliant with IEEE, ANSI, NEMA, IEC 61010‑1, UL, cUL, and CE standards

Key Features

• Comprehensive Feeder Protection: Delivers complete protection including overcurrent, ground fault, sensitive ground fault, directional overcurrent, under/overvoltage, under/overfrequency, phase imbalance, negative sequence, breaker failure, and feeder automation functions.
• Ultra‑Fast Fault Clearing: Multi‑processor architecture provides sub‑cycle operating times for critical protection elements, minimizing feeder downtime and equipment damage during faults.
• Advanced Metering & Monitoring: Provides precise measurement of voltage, current, power, energy, demand, load‑to‑trip percentage, and harmonic analysis (THD) for comprehensive feeder performance monitoring.
• Breaker Health Monitoring (H): Integrates breaker timing, trip/close coil monitoring, and wear analysis to assess long‑term breaker health and predict maintenance needs.
• Flexible I/O & Configuration: 8 digital inputs, 8 relay outputs, and 4 analog outputs support custom protection schemes and integration with legacy and modern control systems.
• Enhanced User Interface: Features a 40‑character backlit LCD display and intuitive keypad for local configuration, parameter viewing, and fault diagnostics.
• Event & Fault Recording: Logs 512 time‑stamped events, detailed fault data, and oscillographic waveform captures for rapid troubleshooting and post‑fault analysis.
• Draw‑Out & Hot‑Swappable Design (R): Allows module replacement without system shutdown, minimizing downtime during maintenance.
• Robust Communication: Supports multiple industrial protocols for seamless integration with PLCs, DCS, SCADA, and power management systems.
• Harsh Environment Resilience: Operates reliably in extreme temperatures and industrial environments with high humidity and vibration.
• Self‑Diagnostics: Built‑in self‑monitoring and fault detection ensures continuous operational integrity.
• EnerVista Software Compatibility: Configurable and monitored via GE’s EnerVista 750 Setup Software for easy setup, remote management, and firmware updates.
• Enhanced Firmware (E): Includes advanced protection algorithms, improved communication protocols, and expanded diagnostic capabilities.

Application Scenarios

• Power Distribution: Primary protection for medium‑voltage distribution feeders, substation feeders, and radial feeders in utility grids.
• Industrial Facilities: Feeder protection for factories, refineries, chemical plants, and heavy industrial sites with critical power distribution needs.
• Mining & Minerals: Protection of power feeders in mining operations, ore processing, and material handling facilities.
• Oil & Gas Industry: Feeder management for onshore/offshore drilling rigs, production platforms, and pipeline pumping stations.
• Water & Wastewater: Protection for feeders in water treatment plants, pump stations, and desalination facilities.
• Data Centers: Critical feeder protection for mission‑critical data center power distribution systems.
• Commercial Buildings: Feeder management in large commercial complexes, hospitals, and high‑rise buildings.
• Renewable Energy: Integration with wind and solar farms for feeder protection in renewable energy installations.
• Marine & Offshore: Feeder protection for marine vessels, offshore support platforms, and floating production systems.