Product Description
Woodward MRI3I5E5D Feeder Protection Relay
Product Overview
- The Woodward MRI3I5E5D is a Feeder Protection Relay designed for comprehensive protection of electrical feeders in medium and high-voltage distribution systems
Technical Specifications
- The MRI3I5E5D has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | MRI3I5E5D |
| Manufacturer | Woodward |
| Description | Feeder Protection Relay with Overcurrent and Directional Earth Fault Protection |
| Series | MR (Modular Relay) |
| Function | Protects electrical feeders against overcurrent, earth faults, and directional faults |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 4–8 MB (for firmware and configuration) RAM: 2–4 MB (for runtime data) |
| Display | Alphanumeric LCD display, 2x16 characters; LED indicators for status, trip, and faults |
| Inputs | 4 current inputs (3 phase + 1 earth, 1 A or 5 A nominal, configurable) 4 voltage inputs (for directional protection, 100–400 VAC) 6 discrete inputs (24–220 VDC, for control signals) |
| Outputs | 5 relay outputs (dry contact, up to 250 VAC/8 A, for trip, alarm, and signaling) 1 analog output (optional, 4–20 mA, for monitoring) |
| Communication Interfaces | 1 serial port (RS-485, Modbus RTU or IEC 60870-5-103) 1 Ethernet port (optional, Modbus TCP or IEC 61850) 1 CANbus port (optional, for system integration) |
| Protection Functions | Phase overcurrent (50/51), earth fault (50N/51N), directional overcurrent (67), directional earth fault (67N), over/under voltage (27/59), over/under frequency (81O/U), breaker failure (50BF) |
| Trip Accuracy | ±5% for current, ±2% for voltage/frequency |
| Response Time | <50 ms (for instantaneous trips); <100 ms (for time-delayed trips) |
| Redundancy | Non-redundant |
| Diagnostics | Fault detection, event logging (up to 500 events), disturbance recording, status LEDs, self-test |
| Compatibility | Woodward control systems (e.g., EasyGen, LS-5), standard current/voltage transformers (1 A/5 A CTs, 100–400 V PTs); third-party devices via Modbus or IEC protocols; integrates with SCADA/DCS systems |
| Power Supply | 24–220 VDC or 100–240 VAC (50/60 Hz, universal input) |
| Power Consumption | Approx. 5–10 W |
| Environmental Specifications | Operating Temperature: -20°C to +70°C (-4°F to +158°F) Storage Temperature: -30°C to +80°C (-22°F to +176°F) Relative Humidity: 5% to 95% non-condensing Vibration: IEC 60068-2-6 compliant Shock: IEC 60068-2-27 compliant |
| Enclosure | IP54 (front panel, when properly mounted); IP20 (rear) |
| Dimensions | Approx. 144 mm (H) x 144 mm (W) x 200 mm (D) |
| Weight | Approx. 1.5–2 kg |
| Mounting | Panel-mounted (flush mount, cutout per manual) or DIN rail (with adapter) |
| Certifications | CE, UL, CSA, IEC 60255 compliant, marine certifications (e.g., DNV, ABS, configuration-dependent) |