Woodward SPM-D10 8440-1019 Sync Controller

Woodward SPM-D10 Synchronizing System (MPN: 8440-1019 / Rev. A/B)

The Woodward SPM-D10 (Part Number: 8440-1019, Model Type: SPM-D1040B) is a microprocessor-based synchronizing unit engineered for automatic single-breaker paralleling in demanding marine switchboards, critical power plants, and offshore diesel-generator installations. Built to interface directly with electronic speed governors and Automatic Voltage Regulators (AVRs), the 8440-1019 delivers phase match and slip-frequency synchronization alongside active voltage matching.

An integrated liquid-crystal display and synchroscope facilitate rapid switchboard commissioning, manual paralleling supervision, and synchro-check permissive interlocking.

Model Details

• Manufacturer: Woodward Inc.
• Series: SPM-D10 Digital Synchronizer Family
• Product Code / MPN: 8440-1019
• Revision Status: Rev. A / Rev. B
• Factory Model Designation: SPM-D1040B (Standard package: 400 VAC Sensing, 24 VDC Auxiliary Supply, Discrete Raise/Lower Bias)
• UL / Class File: E231544
• Origin: Made in Germany

Technical Specifications

Features

1. Precision Synchronization Routines: Dual operating modes (phase matching and slip-frequency synchronization) paired with automatic voltage matching ensure minimal mechanical torque shock across generator-to-bus tie-breakers.
2. Dedicated Speed & Voltage Bias Relays: Configured with four heavy-duty isolated discrete output relays dedicated to governor speed (Raise/Lower) and AVR excitation control.
3. Front Panel Operator Interface: Equipped with a high-contrast two-line alphanumeric backlit LCD, LED synchroscope, breaker status annunciators, and front tactile keypad for parameter setup and metering inspection.
4. Switchboard-Ready DIN Enclosure: Housed in a standardized 144 mm × 72 mm DIN flush-mount casing rated to IP42 front protection (upgradable to IP54 with rubber perimeter gasket kit).

Applications

• Marine Main & Emergency Switchboards: Automatic synchronization of auxiliary medium-speed diesel generator sets (e.g., Wärtsilä, MAN, Yanmar, Daihatsu) to the ship’s 400V/440V distribution grid.
• Shaft Generator & Shore Connection Paralleling: Paralleling PTO/PTI shaft generators or synchronizing shipboard loads during seamless shore-to-ship shore power transfers.
• Offshore Rig & DP Power Management: Dynamic positioning vessel generator synchronization requiring rapid slip synchronizing during heavy step-loading.
• Industrial Cogeneration & Peaking Plants: Reciprocating gas engines (e.g., Jenbacher, Caterpillar, Cummins) and steam turbine island/grid-tie breaker management.
• Critical Emergency Backup Power: Essential data centers and healthcare emergency plant automated synchronization across primary and secondary tie-breakers.

Equipment Compatibility & Interfacing

• Engine Speed Governors: Fully compatible with discrete step-control inputs on Woodward 2301A, 2301D, 723PLUS, Heinzmann E6/E10/Pandaros systems, Barber Colman DYN1 series, and GAC (Governor America Corp) ESD5500E controllers.
• Automatic Voltage Regulators (AVRs): Compatible with motorized AVR setpoint potentiometers, interposing contactors, or discrete raise/lower inputs of Leroy Somer R448/R450, Basler AVC63-12/DECS-100, Stamford/Newage MX321/SX440, and ABB UNITROL units.
• Circuit Breakers: Interlocks with motorized Masterpact (Schneider Electric), ABB Emax/SACE, Eaton Cutler-Hammer, Terasaki TemPower2, and Siemens Sentron vacuum or air circuit breakers (ACB/VCB).

Frequently Asked Questions

What is the primary difference between Woodward SPM-D10 8440-1019 and 8440-1021?

Part number 8440-1019 is configured for two-phase / single-phase sensing with discrete bias outputs, whereas the 8440-1021 (SPM-D10/YB) incorporates full three-phase voltage sensing across both generator and bus circuits. Both units share the same 24 VDC auxiliary power supply and standard DIN 144×72 mounting footprint.

Can the 8440-1019 directly substitute an obsolete analog Woodward SPM-A synchronizer?

Yes, the SPM-D10 series is the factory-designated digital replacement for legacy SPM-A synchronizers. When replacing an SPM-A that utilized discrete contact closure for speed bias, the 8440-1019 drops into place directly, though panel wiring adjustments are required to route PT signals and 24 VDC power to the rear pluggable terminals.

What causes a “Sync Time Exceeded” alarm on the SPM-D10 display?

A “Sync Time Exceeded” alarm triggers when the generator fails to achieve phase coincidence, frequency slip, and voltage tolerances within the programmed maximum synchronizing timer window. On shipboard plants, this is typically caused by uncalibrated governor pulse lengths, poor engine speed stability (worn fuel racks/actuators), or the AVR sensing loop being out of phase or trimmer alignment.

Does the SPM-D10 8440-1019 require specialized PC software for initial setup?

While the unit can be interfaced using Woodward ToolKit or LeoPC via the serial configuration port, initial commissioning can be completed entirely through the front-panel alphanumeric display and keypad. Parameter access can be secured against unauthorized modification via multi-level PIN protection.

How does the dead-bus closing feature function safely on this controller?

When enabled via parameter settings and discrete logic inputs, the SPM-D10 senses whether busbar voltage is below the programmed dead-bus threshold (typically <20% nominal). If the generator’s terminal voltage is healthy and stable, the controller bypasses phase-angle matching and issues an immediate breaker close pulse, restoring emergency power without cross-paralleling risks.