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Woodward 8444-1109
Product Name: Multifunction Power Monitoring & Protection Relay
Product Introduction: A microprocessor-based multifunction relay integrating precise electrical measurement, system protection, and communication capabilities. Designed for monitoring single/three-phase generators and industrial power systems, it provides accurate voltage, current, frequency, and power measurements alongside comprehensive over/undervoltage, over/underfrequency, and reverse power protection.
Detailed content
Technical Specifications:
- Power Supply: 8–32 VDC (12/24 VDC nominal)
- Voltage Input: 120/480 VAC true-RMS
- Current Input: 1/5 A CT secondary true-RMS
- Measurement Accuracy: Class 0.5 (V, I, f); Class 1 (P, Q)
- Protection Functions: 59/27 (over/undervoltage), 81O/U (over/underfrequency), 32 (reverse power)
- Communication: Modbus RTU, CANopen
- Operating Temperature: -20 °C to +70 °C
- Mounting: DIN rail
- Functional Features:
- High-accuracy true-RMS measurement for distorted waveforms
- Configurable protection thresholds and time delays
- Four programmable relay outputs for alarms/tripping
- Event logging with time-stamped fault records
- Local LED indicators and remote monitoring via bus
- Compact, high-density design for control cabinet installation
Application Scenarios:
- Industrial generator set monitoring and protection
- Marine vessel power distribution systems
- Micro-grid and renewable energy hybrid systems
- Commercial building backup power systems
- Oil and gas field remote power units
