Description
Product Overview
The Woodward 8444-1063 C designation is associated with the MFR 300 multifunction relay and measuring-transducer family, used in generator protection, electrical distribution, and grid-monitoring applications. The MFR 300 measures voltage and current in single-phase or three-phase power systems, calculates electrical quantities, and makes measurement data available to supervisory control systems. Its processing architecture calculates true RMS values, helping maintain measurement accuracy when waveforms contain harmonics or transients. The device is not a conventional PLC I/O card: it combines electrical measurement, configurable protection functions, relay outputs, and communication interfaces in one DIN-rail-mounted instrument.
In the MFR 300 family, the Woodward 8444-1063 C identification needs particular attention because the supplied number does not align cleanly with the standard manufacturer part-number table. That table lists the MFR300-71M, configured for 690 VAC rated voltage-transformer input and a 1 A current-transformer secondary, as part number 8444-1091. Other listings associate 8444-1063 with the MFR300-71M. The suffix “C” remains unconfirmed. Engineers should therefore verify the product nameplate and wiring diagram before using the 690 VAC and 1 A specifications as purchase requirements.
For generator and switchgear applications, the MFR 300 can monitor voltage, frequency, phase currents, active power, reactive power, apparent power, and power factor. Configurable thresholds and time delays support functions such as overvoltage, undervoltage, overfrequency, underfrequency, and rate-of-change-of-frequency monitoring. Communication through CANopen or Modbus allows measured values and status information to be shared with a PLC or supervisory system. The unit also provides configurable relay outputs for alarm or trip logic, subject to the installed configuration. During a replacement, verify the voltage-transformer ratio, current-transformer rating, phase sequence, relay logic, communication address, and saved parameter set. Incorrect CT wiring is especially serious: never open an energized current-transformer secondary circuit.
Product Introduction (Non-Templated)
A generator protection relay must do more than display voltage: it needs to measure electrical conditions and trigger the configured response when limits are exceeded. The Woodward MFR 300 combines true RMS measurement, power calculations, configurable protection, and CANopen/Modbus communication in one device.
For a legacy generator-control replacement, confirm the exact 8444 part number, CT secondary rating, PT voltage range, and relay settings before installation. The “C” suffix supplied with this model still requires nameplate verification.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Woodward |
| Model as Supplied | 8444-1063 C |
| Associated Product Family | MFR 300 |
| Associated Model | MFR300-71M, identification requires confirmation |
| Product Type | Multifunction protection relay / measuring transducer |
| Rated Voltage Input | 690 VAC for MFR300-71M |
| Current Transformer Input | 1 A secondary for MFR300-71M |
| Auxiliary Power Supply | 12/24 V DC nominal; operating range 8–32 V DC |
| Voltage Measurement | Three true RMS voltage inputs |
| Current Measurement | Three true RMS current inputs |
| Voltage, Current, Frequency Accuracy | Class 0.5 |
| Power and Energy Accuracy | Class 1 |
| Communication Protocols | CANopen, Modbus |
| Configuration Interfaces | CAN bus, RS-485, service port; confirm exact interface arrangement |
| Relay Outputs | Four configurable changeover relays plus one ready-for-operation relay |
| Operating Temperature | −20°C to +70°C |
| Storage Temperature | −40°C to +85°C |
| Protection Rating | IP20 |
| Mounting | DIN rail |
| Typical Applications | Generator protection, mains monitoring, electrical power measurement |
Specifications describe the MFR 300 family and the MFR300-71M variant. They must not be treated as fully verified specifications for the supplied 8444-1063 C designation until the exact model is confirmed.
8444-1063 C
Related Products
These models belong to the Woodward MFR 300 family or support its configuration. Their voltage ratings, current-transformer inputs, and optional functions differ.
1. 8444-1089 — -11M: Standard MFR 300 variant for a 100 VAC rated voltage-transformer input and 1 A CT secondary. Suitable only where those measurement ratings match the installation.
2. 8444-1090 — -15M: Configured for a 100 VAC rated voltage-transformer input and 5 A CT secondary. Its current-input rating differsthe , so it is not a direct substitute without checking the CT circuits.
3. 841 — : Standard version with a 690 VAC rated voltage-transformer input and 1 A CT secondary. This is the key model to compare against the supplied 8444-1063 C designation.
4. 8444-1092 — -75M: Uses a 690 VAC rated voltage-transformer input and 5 A CT secondary. Intended for installations designed around a 5 A CT secondary, not the 1 A version.
Woodward
5. 8444-1093 — -75M/SU03: An MFR 300 variant with an SU03 communication option. Check the option-specific CAN protocol and supervisory-system requirements before specifying it.
6. 8444-1094 — -75M/K28: A variant with the K28 option, associated with Profibus/CAN coupling functions. Consider it when the required network architecture calls for this option; confirm the full configuration before ordering.
7. 845 — : Listed in Woodward product-support documentation as a replacement for the discontinued 8444-1082 variant. This may be relevant when evaluating legacy 71M configurations, but it does not establish interchangeability with 8444-1063 C.
8. 5417-1251 — DPC-USB Configuration Interface: Woodward configuration accessory used with supported equipment and software. It can be relevant when commissioning or verifying relay settings; confirm the required connection and software version.
Frequently Asked Questions (FAQ)
1. Is Woodward 8444-1063 C compatible with my existing generator protection system?
Compatibility cannot be confirmed from the supplied designation alone. The MFR 300 family supports generator and mains monitoring, but the exact voltage-input rating, CT secondary rating, and communication options must match the installed system.
Check the relay nameplate, electrical drawings, transformer ratios, and existing parameter settings before ordering. If the original unit ked , compare it with the documented 690 VAC voltage-input and 1 A CT-secondary configuration.
2. What is the difference between 8444-1063 C and 8444-1091?
The standard Woodward specification identifies 8444-1091 as the part numbethe . Other product listings associate 8444-1063 with that model, but the available documentation does not conclusively explain the difference or verify the “C” suffix.
Before treating them as equivalent, compare the complete nameplate, hardware revision, option code, and wiring configuration. A matching product-family name is not enough to establish electrical or functional interchangeability.
3. Does the MFR 300 support Modbus and CANopen communication?
Yes. The MFR 300 family supports CANopen and Modbus communication for transmitting measured values and status information to a supervisory control system.
For commissioning, verify:
- The selected communication protocol.
- Network address and transmission settings.
- Required wiring and interface connections.
- The PLC or supervisory-system data mapping.
An incorrect node address or communication configuration can prevent the controller from receiving valid measurement data.
4. Can I hot-swap the relay while the generator or switchgear is energized?
Do not assume live replacement is safe or permitted. The MFR 300 connects to voltage-transformer and current-transformer circuits, and removing the unit may interrupt protection functions.
Critical safety warning: Never open an energized CT secondary circuit. Dangerous voltage can develop when the secondary is disconnected while primary current is flowing.
Follow the approved isolation procedure, secure the affected protection functions, and confirm the manufacturer’s wiring instructions before removing the relay.
5. Will replacing the MFR 300 erase my protection settings?
The replacement unit may not contain the original installation’s configuration. Even when the hardware model matches, protection thresholds, delay timers, relay assignments, and communication parameters may differ.
Before replacement, save or document the existing settings using the supported configuration software. After installation, verify the voltage and current scaling, phase sequence, trip thresholds, relay logic, and communication status. Do not return the generator to service until the protection configuration has been checked and approved.
6. How do I verify a new-surplus Woodward 8444-1063 C is genuine and functional?
A new-surplus description does not independently prove authenticity, unused condition, or successful testing.
Request:
- Photographs of the actual unit’s complete nameplate.
- Confirmation of the exact MFR 300 model and option codes.
- Inspection results for terminals, housing, and connectors.
- Available bench-test records and relay-output checks.
- Written warranty terms and an agreed acceptance procedure.
For critical generator protection, a basic power-on test is insufficient. Testing should cover the relevant measurement inputs, configured thresholds, output relays, and communication functions where suitable equipment is available.
7. What warranty should I require for this Woodward relay?
Warranty coverage depends on the supplier’s written terms and the condition of the specific unit. Confirm the coverage period, functional-test scope, acceptance window, and procedure for reporting a failure.
For a protection relay, request confirmation that the supplied hardware matches the required electrical ratings and configuration. Keep the incoming inspection records and commissioning results so any subsequent failure can be investigated properly.
Procurement recommendation: Before listing or ordering this item, resolve the identification discrepancy between 8444-1063 C and the documented 841 / designation. Confirming the nameplate, PT rating, CT secondary rating, and configuration options is essential before treating the unit as a replacement.
