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Phone: +86 16626708626Description
3. Key Technical Specifications
The Woodward 8440-1706 SPM-D11 provides reliable automatic synchronization by calculating slip frequency and phase angle differences, delivering bias signals to engine governors and automatic voltage regulators (AVR).
| Parameter | Value |
|---|---|
| Part Number | 8440-1706 |
| Manufacturer | Woodward, Inc. |
| Product Line | SPM-D Series Synchronizers (Model SPM-D11) |
| Measuring Inputs | Generator Voltage & Busbar Voltage Sensing (100–480 VAC nominal) |
| Operating Frequency | 50 Hz / 60 Hz nominal systems |
| Power Supply | Wide-range DC or AC control power input |
| Control Outputs | Relay contact / Analog outputs for speed (+/-) and voltage (+/-) bias adjustment |
| Breaker Control | Circuit Breaker Close command output with programmable dwell/anticipation time |
| Display & Interface | Front-panel liquid crystal display (LCD) with LED status indicators and keypads |
| Operating Temperature | -20°C to +70°C |
4. Product Introduction & Supply Chain Strategy
The Woodward 8440-1706 SPM-D11 auto-synchronizer eliminates human error during generator paralleling operations. By matching generator output to the live bus bar prior to breaker closure, it prevents destructive out-of-phase cross-current surges, mechanical shaft shear, and main switchboard trips.
Stocking an uninstalled Woodward 8440-1706 in reserve as New Surplus is a vital risk-mitigation step for power generation facilities. A failed synchronizing relay prevents automated genset paralleling, forcing risky manual synchronization during emergency power events. Securing a factory-sealed unit guarantees unaged output contact relays, undegraded internal microprocessors, and immediate drop-in replacement without panel cutout alterations.
8440-1706
8440-1706
5. Installation & Configuration Guide
High Voltage & Paralleling Danger
Out-of-phase generator paralleling can cause catastrophic alternator failure, explosions, or mechanical shaft destruction. Always verify phase rotation and calibration using a synchroscope prior to enabling automatic breaker closure.
1
Power System Isolation
Prerequisite
1.Power System Isolation:Prerequisite.
De-energize main bus feeds and open generator circuit breakers. Isolate control power to the synchronizer panel.
2
Panel Cutout Installation
Mechanical Mounting
2.Panel Cutout Installation:Mechanical Mounting.
Insert the 8440-1706 unit into the standard DIN panel cutout. Secure the housing using rear-mounting retaining clips to ensure a snug fit against the panel face.
3
Voltage Sensing & Control Landing
Terminal Wiring
3.Voltage Sensing & Control Landing:Terminal Wiring.
Land Generator PT wires, Bus PT wires, breaker close command lines, and speed/voltage bias bias outputs onto designated plug-in terminal blocks according to the wiring diagram.
4
Dead-Bus & Phase Match Calibration
Commissioning
4.Dead-Bus & Phase Match Calibration:Commissioning.
Apply control power and calibrate phase offset and breaker advance time. Conduct a dead-bus / phase-alignment check without closing the main breaker to verify proper speed/voltage tracking response.
6. Firmware/Software Versions & Upgrade Notes
- SPM-D Family Integration: Fully compatible with standard Woodward SPM-D series panel cutouts and wiring harnesses.
- Bias Adjustment: Supports discrete relay pulse outputs or continuous analog signals to interface with electronic governors and AVRs.
- Front Panel Configuration: Parameters can be configured directly using the front keypad and LCD display menu without external software tools.
7. Frequently Asked Questions (FAQ)
Q: Is this Woodward 8440-1706 synchronizer genuinely new? A: Yes, this item is a Brand New Surplus unit. It has never been installed in a switchboard panel or wired to active switchgear, and is preserved in protective OEM packaging.
Q: What is the primary function of the 8440-1706 SPM-D11? A: It monitors generator and busbar voltages/frequencies, regulates the generator speed and voltage to match the bus, and closes the breaker precisely when phase alignment occurs.
Q: Can this unit handle both 50Hz and 60Hz systems? A: Yes, the Woodward SPM-D series is field-configurable for standard 50 Hz or 60 Hz power generation systems.
Q: What warranty accompanies this unit? A: Every Woodward 8440-1706 unit comes with a full 1-year replacement warranty and a certified quality inspection report prior to shipment.
