Product Description
Woodward MRI3I5E5DM Feeder Protection Relay
Product Overview
- The Woodward MRI3I5E5DM is a digital Feeder Protection Relay designed for advanced protection and monitoring of electrical feeders, transformers, and generators in power distribution and industrial applications, such as power plants, substations, and marine systems. Part of Woodward’s MRI3 series, this microprocessor-based relay provides comprehensive protection against overcurrent, ground faults, and other electrical anomalies, ensuring system reliability and equipment safety. The "I5E5DM" designation indicates a 5 A nominal current input, extended functionality, and specific firmware or hardware configurations, including directional protection and multifunction capabilities. The MRI3I5E5DM offers precise protection settings, fault diagnostics, and robust communication options for integration into modern power management systems. Compared to Woodward’s motor protection relays (e.g., MRD1G5MA), genset controllers (e.g., EasyGen-3500-5, 8440-2087), or excitation systems (e.g., DECS-100-B15), the MRI3I5E5DM is tailored for feeder and transformer protection, not motor or engine control. It is distinct from Woodward’s electronic governors (e.g., DYN1-10784-003-0-12), actuators (e.g., 8408-921), and other modules (e.g., 5466-1510 CPU).
Technical Specifications
- The MRI3I5E5DM has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | MRI3I5E5DM |
| Manufacturer | Woodward |
| Description | Digital Feeder Protection Relay |
| Series | MRI3 |
| Function | Protects and monitors electrical feeders, transformers, and generators |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 8–16 MB (for firmware and configuration) RAM: 4–8 MB (for runtime data) |
| Display | LED indicators; optional external HMI or PC interface for configuration |
| Inputs | 3-phase current inputs (5 A nominal, 0.1–40 A range) 1 ground fault current input (5 A or sensitive ground fault detection) 3-phase voltage inputs (up to 690 V, configuration-dependent) 4 discrete inputs (24 VDC) |
| Outputs | 5 relay outputs (dry contact, up to 250 VAC/5 A) 1 analog output (optional, 4–20 mA) |
| Communication Interfaces | 1 serial port (RS-485, Modbus RTU) CANbus (optional, for integration with control systems) Ethernet (optional, Modbus TCP/IEC 61850) |
| Protection Functions | Overcurrent (instantaneous and time-delayed), directional overcurrent, ground fault (directional and non-directional), over/under voltage, over/under frequency, negative sequence, differential protection (configuration-dependent) |
| Trip Accuracy | ±5% of set value (current), ±2% (voltage/frequency) |
| Protection Settings | Configurable trip thresholds, time delays, directional settings, and characteristic curves (ANSI/IEC) |
| Redundancy | Non-redundant |
| Diagnostics | Fault detection, event logging (up to 250 events), disturbance recording, status LEDs |
| Compatibility | Compatible with Woodward control systems (e.g., EasyGen-3200-5, 8440-2050), SCADA systems, and third-party devices via Modbus or IEC 61850; suitable for feeder, transformer, and generator protection |
| Power Supply | 24–250 V AC/DC (universal input) |
| Power Consumption | Approx. 5–15 W |
| Environmental 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: 5% to 95% non-condensing Vibration: IEC 60068-2-6 compliant Shock: IEC 60068-2-27 compliant |
| Enclosure | IP40 (with proper enclosure); IP20 (rear) |
| Dimensions | Approx. 130 mm (H) x 140 mm (W) x 110 mm (D) |
| Weight | Approx. 0.8–1.5 kg |
| Mounting | Panel-mounted or DIN rail |
| Certifications | CE, UL, CSA, marine certifications (e.g., DNV, ABS, configuration-dependent); IEC 61850 compliance (optional) |