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Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 8440-1713 |
| Series / Package | SPM-D11/LSXR |
| Control Power | 24 Vdc (18 – 32 Vdc) |
| Intrinsic Consumption | Max. 10 W |
| Rated Voltage (VT) | 66/115 Vac, max. 150 Vac |
| Impulse Test Voltage | 2.5 kV |
| Measuring Frequency | 40 – 70 Hz |
| Linear Measuring Range (Voltage) | 1.3 × Vrated |
| CT Input | ../5 A |
| Linear Measuring Range (Current) | 3.0 × Irated |
| Rated Short-Time Current (1 s) | 10 × Irated (50 A) |
| Burden | < 0.15 VA |
| Ambient Operating Temp | −20 to +70 °C |
| Humidity | 95%, non-condensing |
| Housing | APRANORM DIN 43 700, 144 × 72 × 122 mm |
| Weight | Approx. 800 g |
| Protection Class | Front IP42 (IP54 with gasket kit P/N 8923-1037), Rear IP21 |
| Approvals | CE, UL/cUL (300 Vac) |
| Manual | JP37292C / 37259 (English) |
Product Introduction
The Woodward 8440-1713 is an SPM-D11/LSXR synchronizer built for single- or three-phase AC generators running with Woodward or compatible speed controls and automatic voltage regulators. It handles breaker synchronizing, load and power factor control, and isochronous load sharing on a single circuit breaker, with built-in generator protection relaying (59/27, 81O/U, 32R/F).
This 24 Vdc variant reads 110 Vac VT and 5 A CT inputs and outputs analog bias signals for voltage and frequency — the LSXR package plants like this handle when raise/lower contact outputs aren’t precise enough for tight droop or isochronous control loops.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No LCD, no power indication | Control power fault or blown internal fuse | ❌ Low | Measure 24 Vdc at control power terminals with a multimeter | Check upstream power supply and wiring before replacing the unit |
| Unit won’t synchronize / breaker never closes | VT or CT wiring reversed, phase rotation mismatch | ❌ Low | Verify VT/CT phase and polarity against the wiring diagram | Correct field wiring; this is rarely a unit defect |
| Voltage/frequency bias output stuck or erratic | Analog bias signal misconfigured, or downstream governor/AVR fault | ✅ Medium | Check bias output with a multimeter against expected range (e.g., ±10 V or 0–20 mA) | If output holds steady but governor doesn’t respond, suspect the governor or AVR first |
| Sync check never passes | Generator and bus frequency/voltage windows too tight, or unstable prime mover speed | ❌ Low | Read live gen/bus voltage and frequency on the front panel display | Adjust sync check window settings before assuming a hardware fault |
| Relay output contacts don’t operate | Failed output relay or blown output fuse | ✅ High | Check for relay click/continuity at the terminal with the unit powered and command active | If verified dead, replace the module |
| Display shows garbage or frozen characters | Firmware corruption or internal fault | ✅ High | Power-cycle the unit and observe boot behavior | Persistent fault after power cycle usually means the unit needs replacement |
If you’re still stuck after these checks, contact technical support with photos of your wiring terminals and the exact fault behavior — that’s faster than guessing over the phone.
8440-1713
8440-1713
Frequently Asked Questions
Is the 8440-1713 the same as other SPM-D11 part numbers I’ve seen?
No. Woodward’s SPM-D11 line splits by control power (12/24 Vdc vs. 24 Vdc), measuring input type (110 Vac VT vs. 400 Vac direct), and CT rating (../1 A vs. ../5 A). The 8440-1713 is specifically the 24 Vdc / 110 Vac VT / 5 A CT LSXR variant. Swapping in a different part number in this family — like 8440-1706 or 8440-1715 — will not match your measuring inputs. Check your existing unit’s nameplate before ordering.
Why is this listed as obsolete if it still works fine?
Woodward has moved newer gensets toward digital genset controllers like the easYgen series. The SPM-D11 platform predates that shift and is no longer in active production, though a lot of installed systems still run it. That’s exactly why parts like this circulate through the surplus and refurb market instead of direct-from-OEM.
Can I hot-swap this unit while the generator is running?
No. Pull control power before removing or installing this module. The unit interfaces directly with breaker close commands and governor/AVR bias signals — hot-swapping risks a false breaker closure or an uncontrolled bias output to your governor.
Will my parameter settings transfer from the old unit?
Not automatically. Parameter values are configured through the front panel or via PC using Woodward’s DPC cable and configuration software. Document your existing settings (sync check windows, bias output ranges, relay assignments) before pulling the old unit, and re-enter them on the replacement.
Why is this cheaper than buying new from Woodward?
Because Woodward no longer sells this part new. Units in the surplus/refurb channel come from decommissioned equipment, warehouse stock, or teardowns — not counterfeit production. That’s the tradeoff: lower cost, but confirm testing documentation before you buy.
What’s the warranty on a surplus or refurbished unit?
This depends on the seller. Ask specifically whether the unit was load-tested under simulated sync conditions (not just powered on) and whether a written test report is included.
Do I need special software to configure this?
Yes, for PC-based configuration you need Woodward’s DPC cable plus the matching configuration software. Front-panel configuration is possible without it but is slower for setting up multiple parameters.
