Woodward 8440-1546 is a configured MFR 2 Multifunction Relay used in generator protection, synchronization, monitoring, and power-management applications. The identifiable configuration associated with this part number is MFR2S45B/A2CDD06D09HI1I4JK24M. Woodward-SEG's legacy equipment replacement database lists 8440-1546 with this MFR2 configuration and identifies 8440-1936 / EASYGEN-3500-5/P2 as a similar replacement item.
The MFR 2 is not simply a digital speed controller. It is a multifunction generator relay designed to monitor electrical parameters and perform protection and control functions associated with generator and mains operation. The MFR 2 documentation describes functions including generator overload, reverse/reduced power, unbalanced load, overcurrent, ground fault, reactive power, frequency and voltage monitoring, mains protection, mains decoupling, and centralized alarm functions.
For replacement projects, customers should provide the existing nameplate photograph and complete part number before ordering. Different MFR 2 configurations can have different electrical inputs, option packages, and application functions.
| Woodward 8440-1546 Product Identity | |
|---|---|
| Brand | Woodward |
| Product Family | MFR 2 |
| Series | MFR 2 Multifunction Relay |
| Part Number | 8440-1546 |
| Complete Configuration | MFR2S45B/A2CDD06D09HI1I4JK24M |
| Product Type | Multifunction Relay |
| Main Application | Generator protection and control |
| Generator Configuration | Synchronous generator configuration |
| CT Configuration | 5 A secondary |
| PT Configuration | 400 Vac secondary configuration |
| Mounting | Flush mounting |
| Power Supply | 24 Vdc class supply |
| Communication | Configuration dependent |
| Product Status | Legacy MFR 2 generation |
| Condition | New / Original subject to availability |
| Software / Firmware | Configuration dependent |
|
Origin |
USA |
|
Dimension |
25*25*15cm |
|
Weight |
0.45kg |
Main Functions of Woodward 8440-1546
Generator Protection
One of the principal functions of the MFR 2 is monitoring and protecting the generator against abnormal electrical operating conditions.
Depending on the exact configuration, the MFR 2 family supports functions such as:
Generator overfrequency
Generator underfrequency
Generator overvoltage
Generator undervoltage
Generator overload
Reverse power / reduced power
Overcurrent protection
Ground fault monitoring
Unbalanced load monitoring
Reactive power monitoring
Generator voltage monitoring
Generator frequency monitoring
Battery voltage monitoring
Generator and Mains Monitoring
In applications where the generator operates together with a utility network, the MFR 2 can evaluate both generator-side and mains-side electrical parameters.
Typical monitored parameters include:
Voltage
Frequency
Current
Phase relationship
Asymmetry
Active power
Reactive power
Breaker-related status
Mains operating condition
This makes the MFR 2 suitable for generator switchgear and power-management systems where the controller must distinguish between normal operation, abnormal generator condition, and mains disturbances.
Synchronization
The MFR 2 can be used as part of a generator synchronization system.
Before closing a generator circuit breaker onto a live bus or utility network, the control system must evaluate the electrical relationship between the generator and the bus/mains.
Typical synchronization parameters include:
Generator voltage
Bus voltage
Generator frequency
Bus frequency
Phase relationship
Breaker status
The MFR 2 family is designed to support generator/mains control applications that require synchronization and breaker coordination.
Load and VAR Sharing
The MFR 2 can also be used in systems where several generator units operate together.
In multi-generator installations, the control system may need to coordinate:
Active power
Reactive power
Generator loading
Load distribution
This makes the device relevant to:
Parallel generator systems
CHP plants
Industrial power stations
Standby generator installations
Generator-to-grid parallel operation
MFR2S45B Configuration
Woodward-SEG's legacy replacement database identifies the complete configuration associated with 8440-1546 as:
MFR2S45B/A2CDD06D09HI1I4JK24M
| Code | Configuration Meaning |
|---|---|
| MFR2 | MFR 2 Multifunction Relay |
| S | Synchronous generator configuration |
| 45 | 5 A CT / 400 Vac PT configuration |
| B | Flush mounting |
| A2CDD06D09HI1I4JK24M | Option/package configuration |
The complete option string should be treated as a configuration identifier rather than assuming that every individual letter automatically represents a standalone feature. For replacement procurement, matching the complete configuration is preferable to matching only the basic model number
8440-1546 Associated and Replacement Models
| Part Number | Model / Description | Relationship |
|---|---|---|
| 8440-1546 | MFR2S45B/A2CDD06D09HI1I4JK24M | Target product |
| 8440-1936 | EASYGEN-3500-5/P2 | Similar replacement listed by Woodward-SEG |
| 8440-1542 | MFR2S41B/PSV+A2I3SB | Related MFR2 configuration |
| 8440-1528 | MFR2S15B/PSV+A2I3SB | Related MFR2 configuration |
| 8440-1409 | MFR2S45B/A2CD06D09HI1I4JK24MMB | Related MFR2 configuration |
| 8440-1335 | MFR2S45B/PSV+A2I3SB | Related MFR2 configuration |
| 8440-1323 | MFR2S45B/PSVA | Related MFR2 configuration |
| 8440-1287 | MFR2S15B/PSVA | Related MFR2 configuration |
Woodward-SEG specifically lists 8440-1546 and identifies 8440-1936 / EASYGEN-3500-5/P2 as the similar item. It does not establish that every MFR2 configuration can be replaced by the same EasyGen model.
Installation and Commissioning
Woodward 8440-1546 / MFR2 is installed as part of a generator protection and control system. Before installation, confirm that the complete part number, configuration, power supply, CT/PT ratings, and I/O requirements match the existing application. The installation should be performed by qualified personnel familiar with generator protection, switchgear and electrical control systems.
Disconnect the Existing Equipment
Before removing an existing MFR2, isolate the relevant control and measurement circuits according to the site's electrical safety procedures.
Do not disconnect CT circuits under load without following the site's approved CT isolation procedure.
Record Existing Wiring
Before removing the original unit, photograph and record:
Terminal numbers/CT connections/PT connections/DC power connections/Digital inputs/Relay outputs/Communication wiring/Grounding/External control signals
This information can be used as a reference during installation of the replacement unit.
Verify the Replacement
Compare the replacement unit with the original unit.
The following information should match:
Part Number → Configuration → CT/PT → I/O → Mounting → Application
Do not rely only on the external appearance.
Mechanical Installation
Install the MFR2 into the existing control panel according to the applicable mounting arrangement.
Confirm that:
The unit is securely fixed.
No terminal is mechanically stressed.
Wiring has sufficient clearance.
Ventilation requirements are maintained.
The front panel can be accessed after installation.
Electrical Connection
Reconnect the wiring according to the applicable Woodward documentation.
Particular attention should be given to:
DC Power → CT → PT → Digital Inputs → Relay Outputs → Communication
Incorrect CT/PT wiring can result in incorrect electrical measurements and protection behavior.
Commissioning After Installation
After mechanical and electrical installation, the MFR2 should be commissioned before being returned to normal generator operation.
Visual Inspection→Power Supply Verification→Display / LED Check→Measurement Input Verification→Digital Input Verification→Relay Output Verification→Protection Parameter Verification→Synchronization Verification, if applicable→Generator Test→Final Operational Check
The exact commissioning sequence should follow the applicable MFR2 documentation and the site's approved commissioning procedure.
FAQ
Q: What type of generator is associated with the 8440-1546 configuration?
A: The configuration MFR2S45B identifies the synchronous-generator version in the MFR 2 model structure. The complete application should still be checked against the actual unit documentation.
Q: What CT configuration is associated with 8440-1546?
A: The 45 configuration is associated with a 5 A CT secondary and a 400 Vac PT secondary configuration. Verify the actual nameplate before replacement.
Q: What information should I provide when requesting a replacement?
A: Please provide:
Part Number + Quantity + Nameplate Photo + Application + Destination
For a replacement project, the existing wiring or configuration information is also helpful.
Q: Can you provide actual photos?
A: Yes. Actual front, rear, nameplate, packaging, and inspection photographs can be provided when available.