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WOODWARD EGCP-2 8406-121 – Engine Generator Control Package
Product Overview
The WOODWARD EGCP-2 8406-121 is a microprocessor-based Engine Generator Control Package designed for generator-set control, synchronization, load management, and engine protection. The 8406-121 version is specifically configured for 50–150 VAC potential-transformer input and operates from a 9–32 VDC supply. It can be applied to single-generator systems, mains-parallel installations, and multiple-generator systems operating on an isolated bus. Functions include generator and utility voltage monitoring, automatic synchronization, real-power and reactive-power control, engine sequencing, protection, and Modbus communication. Woodward documentation identifies 8406-121 as an EGCP-2 model and provides dedicated application, communications, and installation manuals.
Technical Specifications — EGCP-2 8406-121
| Parameter | Value |
|---|---|
| Product Model | EGCP-2 8406-121 |
| Manufacturer | Woodward |
| Product Type | Engine Generator Control Package |
| Product Family | EGCP-2 |
| PT Input | 50–150 VAC |
| DC Supply | 9–32 VDC |
| Typical Supply | 24 VDC |
| Application | Engine-generator control |
| Generator Functions | Synchronizing, load control, protection |
| Operating Modes | Standby, prime power, mains parallel, baseload, process |
| Real Power Control | kW load control |
| Reactive Power Control | kVAR / power-factor control |
| Communication | Modbus / PC interface |
| Display | Dual backlit LCD displays |
| Keypad | Integrated front-panel keypad |
| Operating Temperature | -20 to +70 °C |
| Storage Temperature | -40 to +105 °C |
| Dimensions (H×W×D) | Approx. 282 × 358 × 69 mm |
| Mounting | Control panel / industrial cabinet |
Woodward’s documentation confirms the 50–150 VAC PT range, 9–32 VDC supply, operating-temperature range, and physical dimensions.
WOODWARD EGCP-2 8406-121
Key Features and Benefits — EGCP-2 8406-121
- Automatic generator synchronization and breaker control.
- Engine start/stop sequencing for generator-set applications.
- Real-power kW and reactive-power kVAR management.
- Generator and mains electrical protection functions.
- Suitable for single-unit and multiple-unit installations.
- Front-panel LCD displays provide operating, alarm, and configuration information.
- Modbus and PC communication capabilities support supervisory integration.
Personally, I would check the PT input range first when sourcing a replacement. The 8406-121 is the 50–150 VAC PT version, while the closely related 8406-120 uses a different 150–300 VAC PT input range. These versions should not be treated as interchangeable simply because they belong to the same EGCP-2 family.
Related Models
EGCP-2 8406-120 — Related generator-control model using a 150–300 VAC PT input range instead of the 50–150 VAC range.
EGCP-2 8406-123 — Another EGCP-2 configuration with a 50–150 VAC PT input specification for related generator-control applications.
EGCP-3 8406-113 — Later-generation Woodward generator controller configured for load-sharing applications.
Woodward 505 Series — Digital turbine-control family used primarily for steam-turbine governing and generator applications.
Installation and Maintenance — EGCP-2 8406-121
Before replacement, record the installed software revision, PT ratios, generator voltage settings, CT configuration, synchronization parameters, breaker logic, engine-control settings, and communication configuration. Confirm that the incoming PT signals remain within the specified range.
During maintenance, inspect PT and CT wiring, terminal connections, grounding, communication wiring, display/keypad operation, and cooling conditions. After replacement, verify voltage and frequency measurements, synchronization, breaker operation, engine start/stop sequencing, kW/kVAR control, alarms, and shutdown functions under controlled commissioning conditions.
Woodward has issued multiple field software upgrades for this model, including upgrades from earlier 8406-121 revisions to later software versions. The upgrade documentation states that configuration and calibration settings are retained during the specified application-software upgrade process.
Product Warranty — EGCP-2 8406-121
Warranty coverage depends on supplier condition and sales terms. Confirm whether the unit is new old stock, refurbished, repaired, or previously installed, and request serial-number traceability, software revision, functional-test records, and applicable warranty documentation.
The WOODWARD EGCP-2 8406-121 is a configuration-sensitive generator controller. For legacy power-generation equipment, matching the PT input range, hardware revision, software revision, and stored application configuration is essential before replacement.
