Configured for complex power management in multi-genset networks, the Woodward 8440-1560 (8440-1560 Power Management Unit) provides direct physical/electrical execution. It integrates engine-generator control, Automatic Mains Failure (AMF) detection, True RMS sensing, and utility paralleling functions within a single microprocessor-based hardware device.
| Parameter | Specification |
|---|---|
| Model | 8440-1560 (EasyGen-3200-5) |
| Brand | Woodward |
| Origin | USA |
| Weight | 907 g (Net) |
| Dimensions | 250 mm x 227 mm x 84 mm |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | Driven by 12/24 VDC nominal (8.0 to 40.0 VDC operating range) |
| AC Voltage Sensing | 3-phase, True RMS (Rated up to 480 VAC phase-to-phase) |
| AC Current Sensing | 3-phase, True RMS (1 A or 5 A secondary inputs) |
| Communication Ports | 2x CAN (J1939/CANopen), 1x Ethernet (TCP/IP), 1x RS-485 (Modbus RTU) |
| Speed Control Output | +-10 VDC or PWM output to governor |
| Voltage Control Output | +-10 VDC to AVR (Automatic Voltage Regulator) |
| Enclosure Protection | IP65 front panel (when mounted), IP20 rear housing |
The unit provides discrete speed and voltage bias commands to regulate synchronous alternators. Its internal algorithms link closely with V/Hz and field-oriented vector control systems inside external active drives and governors, adjusting excitation via the +-10 VDC analog outputs to correct reactive power distribution. By executing high-resolution True RMS evaluation of the 3-phase voltage and current waveforms, the device dampens harmonic distortion propagation during synchronization windows. This is matched with real-time actuator loop feedback response tracking, stabilizing isochronous load sharing and preventing thermal heat sink dissipation profiles from exceeding safety boundaries in adjacent engine-room hardware.
Q: What is the maximum continuous current capacity supported by the AC current sensing inputs?
A: The AC current sensing inputs are designed for standard instrument transformers, accepting either 1 A or 5 A secondary inputs. Direct attachment of high-current generator output conductors will cause immediate thermal failure of the internal sensing traces.
Q: How does the device handle low-voltage transients during engine cranking profiles?
A: The micro-controlled power supply circuit features an operating range extending down to 8.0 VDC. This ensures deterministic processing continuity and stops the internal CPU from initiating an unintended hardware reset during the high-current sag typical of starter motor engagement.
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