Description
Product Overview
The Woodward SPM-D2-1115B/LSXR 8440-2165 is a digital synchronizer and load-sharing controller designed for generator paralleling applications. It monitors generator and bus electrical conditions and manages the synchronization process before a generator circuit breaker closes. Its control functions are intended to bring generator voltage, frequency, and phase relationship into the required synchronization window. Once generators operate in parallel, the controller also supports active-power and reactive-power sharing through analog kW and kVAR load-sharing lines.
This model belongs to the SPM-D2-11 series configuration for two-phase paralleling with single-phase current-transformer sensing. The 8440-2165 version uses 100 VAC measuring inputs and a /5 A current-measurement configuration. The LSXR designation is associated with its load-sharing and control configuration. The controller provides speed/load and voltage/power-factor adjustment functions through configurable outputs, allowing it to interface with an engine governor and automatic voltage regulator. The actual signal ranges and wiring must be checked against the application configuration and the equipment manuals.
For maintenance and replacement work, the distinction between the original SPM-D and the updated SPM-D2 is critical. Woodward’s part-number mapping identifies 8440-2165 as the SPM-D2-1115B/LSXR successor to the original SPM-D1115B/LSXR, part number 8440-1706. Although the successor is documented in the product-support mapping, a replacement still requires verification of sensing connections, CT polarity, PT voltage, breaker logic, governor and AVR bias wiring, and load-sharing bus configuration.
Product Introduction (Non-Templated)
Generator paralleling problems are not always caused by the engine governor or AVR. Incorrect phase sensing, CT polarity, PT wiring, or breaker-close logic can prevent a synchronizer from achieving stable operation. The SPM-D2-1115B/LSXR combines synchronization and load-sharing functions, so commissioning must verify both the electrical measurement circuits and the control outputs.
When replacing an original SPM-D1115B/LSXR, do not rely on the shared model-family name. The 8440-2165 designation identifies the D2 successor. Record the original terminal wiring, sensing configuration, and load-sharing signal arrangement before making the change.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Woodward |
| Product Model | SPM-D2-1115B/LSXR |
| Part Number | 8440-2165 |
| Product Family | -11 |
| Controller Type | Digital synchronizer and load-sharing controller |
| Application | Two-phase generator paralleling |
| Generator Voltage Sensing | 100 VAC measuring-input version |
| Bus Voltage Sensing | Two-phase system measurement configuration |
| Current Sensing | Single-phase CT input, /5 A |
| Active Power Sharing | Analog kW load-sharing lines |
| Reactive Power Sharing | Analog kVAR load-sharing lines |
| Synchronization | Generator-to-bus synchronization |
| Breaker Control | Generator circuit-breaker closing control |
| Governor Interface | Speed/load bias and raise/lower control |
| AVR Interface | Voltage/power-factor bias and raise/lower control |
| Analog Output Options | Configurable voltage/current signal ranges |
| Discrete Inputs | 4 alarm inputs |
| Discrete Outputs | 7 outputs |
| Configuration Software | Woodward ToolKit |
| USB Serial Interface | 1 |
| Product Specification | 37623 |
| Operating Manual | 37618 |
The detailed measuring ranges, output assignments, supply configuration, and terminal connections must be confirmed from the product specification and installation manual for the exact hardware revision.
SPM-D1115B 8440-2165
Major Features and Advantages
Automatic generator synchronization
The controller monitors electrical conditions relevant to synchronization and manages the control process before breaker closure. Correct PT wiring and phase-reference configuration are essential to reliable operation.
Two-phase paralleling configuration
The 1115B/LSXR variant is intended for two-phase paralleling applications. It should not be confused with the -1040B or -1010B three-phase product configurations.
Single-phase CT sensing
The controller uses a single-phase current-sensing arrangement. CT ratio, polarity, secondary wiring, and grounding must match the installation design. Incorrect CT polarity can produce misleading power measurements and load-sharing behavior.
Active and reactive load sharing
The LSXR configuration supports analog kW and kVAR load-sharing lines. This allows multiple generators operating in parallel to coordinate real-power and reactive-power distribution.
Governor and AVR adjustment
Configurable speed/load and voltage/power-factor control outputs provide interfaces to the prime-mover governor and generator AVR. The selected signal type and scaling must match the connected equipment.
Generator protection functions
The -11 product specification lists generator overvoltage, undervoltage, overfrequency, underfrequency, overload, reverse-power, and reduced-power protection functions. Protection settings and trip arrangements should be checked against the plant protection philosophy.
PC-based configuration
Woodward ToolKit provides the configuration interface. Before replacing a controller, preserve the existing configuration and record the installed settings so the replacement can be commissioned against the approved operating parameters.
Documented successor to the original SPM-D
Woodward’s part-number mapping identifies 8440-2165 as the D2 successor to original SPM-D1115B/LSXR part number 8440-1706. This is useful for lifecycle planning, but does not eliminate the need for wiring and configuration checks.
Related Products
- SPM-D1115B/LSXR – 8440-1706: Original SPM-D synchronizer configuration; predecessor to 8440-2165.
- -1145B/LSXR – 8440-2169: Related two-phase paralleling controller with single-phase CT sensing and analog kW/kVAR load sharing.
- -1040B – 8440-2164: Two-phase paralleling controller with 400 VAC measuring inputs.
- -1010B – 8440-2166: Two-phase synchronizer with a different measuring-input configuration.
- -1010B/YB – 8440-2167: Three-phase paralleling controller variant.
- -1040B/YB – 8440-2176: Three-phase paralleling controller variant.
- -1010B/NYB – 8440-2177: Three-phase paralleling configuration with a different power-supply designation.
- -1040B/NYB – 8440-2189: Related three-phase controller configuration.
These models have different sensing arrangements and application configurations. They should not be substituted solely on the basis of the family designation.
Frequently Asked Questions
Q1: What is Woodward 8440-2165?
It is the Woodward -1115B/LSXR digital synchronizer and load-sharing controller. It is designed for two-phase generator paralleling with single-phase CT sensing and analog kW/kVAR load-sharing lines.
Q2: Is SPM-D1115B the same as -1115B/LSXR?
No. The original SPM-D1115B/LSXR uses part number 8440-1706. dated /LSXR uses 8440-2165. Woodward’s product-support mapping identifies the latter as its successor.
Q3: Can 8440-2165 replace 8440-1706?
Woodward documents 8440-2165 as the successor to 8440-1706. Before replacement, compare the measuring-input wiring, CT configuration, breaker control, governor and AVR interfaces, load-sharing signals, and configuration settings.
Q4: Can I hp the /LSXR?
Do not assume hot-swap capability. Isolate the relevant control and sensing circuits according to the generator control-panel procedure. Ensure that generator synchronization and breaker-close functions cannot operate unexpectedly during maintenance.
Q5: Does the controller support firmware v3.1?
Firmware v3.1 should not be assumed compatible based on the model number. The relevant configuration is managed through Woodward ToolKit. Verify the installed hardware revision, software version, and configuration-file compatibility.
Q6: What generator measurement inputs does 8440-2165 use?
The documented 8440-2165 configuration uses 100 VAC measuring inputs and /5 A current sensing. Confirm the actual PT secondary voltage, CT ratio, and wiring arrangement before commissioning.
Q7: What should be tested before accepting a replacement?
Verify voltage and current measurement accuracy, phase-reference signals, synchronization limits, breaker-close output, governor bias, AVR bias, kW/kVAR sharing signals, alarm inputs, and protection functions. Perform testing under an approved commissioning procedure.
Procurement and Quality Control Notes
Fdward /LSXR 8440-2165, the most important purchasing requirement is correct identification of the D2 hardware rather than the original SPM-D version.
Before shipment, request:
- Clear photographs of the model and part-number label.
- Confirmation of part number 8440-2165.
- Confirmaf the /LSXR designation.
- Hardware revision and serial number.
- Inspection of terminal blocks and electrical connectors.
- Confirmation of the 100 VAC measuring-input configuration.
- Functional-test evidence for synchronization and load-sharing functions.
- Confirmation of ToolKit configuration compatibility.
- Written condition classification: new, unused, refurbished, or used.
- Warranty and return conditions.
Engineering recommendation: If the existing installation uses original /LSXR, part number 8440-1706, evaluate 8440-2165 as the documented D2 successor. Preserve the original configuration and verify all sensing and control connections before returning the generator to parallel operation.
