Description
🔹 Product Introduction
The Woodward MFR1 LR21035 is a multifunctional protection, control, and monitoring module designed for generator, switchgear, industrial power, and marine electrical applications. It combines measurement and monitoring functions in a compact relay platform, helping operators supervise important electrical parameters and configure protection functions for generator systems.
The MFR1 platform uses microprocessor-based measurement technology and supports monitoring of voltage, current, frequency, and power-related conditions. The front-panel interface allows users to view operating values and configure applicable protection parameters.
This LR21035 unit is identified as MFR13 / Rev. J in commonly listed configurations. It can be used as a replacement or spare for existing Woodward MFR1 installations, subject to verification of revision, wiring, auxiliary supply, configuration, and system requirements.
🔹 Key Features
- Multifunction electrical protection and monitoring
- True RMS measurement technology
- Voltage and current monitoring
- Frequency and power supervision
- Microprocessor-based control platform
- Front-panel LCD display
- Front-panel configuration controls
- 24 VDC auxiliary power supply
- Compact panel or switchgear mounting
- Suitable for generator and marine power applications
- Designed for integration with existing electrical protection systems
🔹 Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Woodward |
| Model | LR21035 |
| Series | MFR1 |
| Product Name | Converting, Controlling & Monitoring Module |
| Variant | MFR13 |
| Revision | Rev. J |
| Technology | Microprocessor-based multifunction relay |
| Measurement | True RMS voltage and current measurement |
| Auxiliary Power | 24 VDC nominal |
| Auxiliary Supply Range | Approx. 18–30 VDC |
| Display | Two-line LCD display |
| Interface | Front-panel programming buttons |
| Mounting | Panel / switchgear flush mounting |
| Application | Generator protection, monitoring and control |
| Place of Manufacture | Germany |
| Condition / Status | Used / Pre-Owned |
| Weight | Approx. 0.9–1.2 kg |
🔹 Functional Applications
The Woodward MFR1 LR21035 can be applied to electrical systems requiring combined measurement and protection functions, including:
- Diesel generator sets
- Standby generator systems
- Marine power generation
- Industrial switchgear
- Generator control panels
- Power distribution systems
- Electrical protection panels
- Retrofit and maintenance projects
Its multifunction design can reduce the need for separate monitoring and protection devices while providing a centralized interface for electrical operating values and protection settings.
🔹 Installation & Integration
Before installation, verify the complete part number, revision, MFR variant, auxiliary power requirement, CT/VT connections, and existing protection configuration.
Connect voltage transformer and current transformer circuits according to the applicable system wiring diagram. Verify polarity and phase identification before energizing measurement inputs.
After power-up, check the LCD display and diagnostic information. Confirm voltage, current, frequency, and other displayed measurements against known system values before enabling protection outputs.
For replacement applications, record existing setpoints and configuration parameters before removing the original unit. The replacement should be configured to match the approved generator or switchgear protection scheme.
🔹 Maintenance Recommendations
- Inspect the front display and keypad for physical damage.
- Check rear terminal connections for looseness or corrosion.
- Verify the 24 VDC auxiliary supply remains within the required range.
- Inspect CT and VT wiring during scheduled maintenance.
- Compare displayed measurements with calibrated external instruments.
- Review protection thresholds and time delays periodically.
- Keep the panel enclosure clean and adequately ventilated.
- Record firmware, hardware revision, and configuration data before replacement.
🔹 FAQ
Q1. What is the Woodward MFR1 LR21035 used for?
It is a multifunction protection, control, and monitoring module for generator and electrical power systems.
Q2. What does MFR1 mean?
MFR1 refers to Woodward’s multifunction relay platform used for electrical measurement, protection, control, and monitoring applications.
Q3. Does the LR21035 support True RMS measurement?
Yes. The MFR1 platform uses True RMS measurement for voltage and current monitoring.
Q4. What auxiliary power does this module use?
The commonly specified auxiliary supply is 24 VDC, with an approximate 18–30 VDC operating range.
Q5. Does the unit have a display?
Yes. The module includes a two-line LCD display with front-panel control buttons.
Q6. Can it be used in marine generator systems?
Yes. MFR1 modules are used in generator, switchgear, and marine power applications.
Q7. Is LR21035 the same as every MFR1 module?
No. MFR1 units can have different part numbers, variants, and revisions. Always match LR21035 and the MFR13/Rev. J configuration against the existing system.
Q8. What condition is this item?
This listing is identified as Used / Pre-Owned.
🔹 Recommended Woodward Models
- Woodward MFR1 LR21035 MFR13
- Woodward MFR13 Multifunction Protection Relay
- Woodward DSLC-2 Digital Synchronizer and Load Control
- Woodward SPM-D10 Synchronizing System
- Woodward EGCP-2 Engine Generator Control Package
- Woodward 2301A Speed Control
- Woodward 2301D Digital Load Sharing and Speed Control
- Woodward 505 Digital Turbine Governor
- Woodward easYgen Generator Controller
- Woodward UMT1 Measuring Transducer
🔹 Product Summary
The Woodward MFR1 LR21035 MFR13 Rev. J is a multifunction electrical protection and monitoring module for generator and power-control applications. Its combination of True RMS measurement, electrical monitoring, front-panel display, configurable protection functions, and 24 VDC auxiliary power makes it a practical spare or replacement component for industrial and marine generator systems.
