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- Woodward
- 9905-001K
- SPM-A Synchronizer
- USA
- 140 × 100 × 60 mm
- 1.69 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Woodward 9905-001K SPM-A Synchronizer is a generator synchronization device used in engine-generator and power-generation control systems. It monitors the electrical relationship between an incoming generator and an energized bus so that the generator can be brought into the required synchronization condition before connection.
In a typical generator installation, the synchronizer works with the engine speed-control system and generator breaker circuit. Differences in generator frequency and phase are used to determine whether the incoming generator is approaching an acceptable point for breaker closing.
The 9905-001K is particularly relevant to generator sets operating in parallel with an existing bus or other generating units. Synchronization allows the generator to be connected without an uncontrolled electrical transition that could place unnecessary stress on the generator, prime mover, breaker, or connected power system.
It can be incorporated into generator control panels where synchronization is handled as a dedicated control function alongside speed regulation, voltage regulation, protection, and breaker control.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Woodward |
| Model | 9905-001K |
| Product Family | SPM-A |
| Product Series | SPM |
| Product Type | Synchronizer |
| Primary Function | Generator-to-bus synchronization |
| System Role | Synchronizing control device |
| Application | Generator control and power-system synchronization |
| Installation | Generator control panel / control cabinet |
| Dimensions | 140 × 100 × 60 mm |
| Weight | 1.69 kg |
Product Features
- SPM-A synchronizer for generator applications
- Supports synchronization between an incoming generator and energized bus
- Monitors generator and bus electrical conditions during synchronization
- Works with generator speed-control equipment
- Suitable for generator breaker closing sequences
- Applicable to parallel generator installations
- Can be integrated into engine-generator control panels
- Suitable for industrial and standby power-generation systems
Working Principle
The 9905-001K compares the electrical condition of the incoming generator with the reference bus during the synchronization process. Generator frequency and phase relationship are key conditions used to determine whether the generator is approaching the required connection point.
When the generator frequency differs from the bus, the synchronizer works with the associated speed-control system so that engine speed can be adjusted toward the required operating condition. As the phase relationship approaches the acceptable synchronization point, the synchronizer participates in the breaker-closing sequence.
A typical operating path is:
Generator → Electrical Sensing → 9905-001K SPM-A → Speed Control / Breaker Control → Generator Breaker → Bus
The SPM-A does not perform the complete generator control function by itself. Engine speed, generator voltage, protection functions, and breaker operation remain dependent on the other components installed in the generator control system.
If synchronization conditions are not acceptable, the associated breaker-control logic should prevent the generator from being connected to the energized bus.
Role in Generator Control Architecture
The 9905-001K SPM-A Synchronizer occupies the synchronization-control portion of the generator automation system. It receives the required electrical information and works with the speed-control and breaker-control circuits to coordinate generator connection.
Generator & Bus Measurements → 9905-001K SPM-A → Generator Speed Control → Breaker Control → Generator Breaker
| System Element | Function |
|---|---|
| Generator | Supplies the incoming electrical power |
| Bus | Provides the electrical reference for synchronization |
| Voltage Sensing | Supplies generator and bus voltage information |
| 9905-001K SPM-A | Evaluates synchronization conditions |
| Speed Control | Adjusts engine speed and generator frequency |
| Voltage Regulator | Controls generator excitation and voltage |
| Breaker Control | Coordinates generator breaker operation |
| Generator Breaker | Connects the generator to the bus |
| Protection System | Protects the generator and connected electrical system |
The synchronizer therefore works as one element within the overall generator-control architecture rather than acting as a standalone generator controller.
Industrial Applications
| Application | Typical Use |
|---|---|
| Diesel Generator Sets | Synchronizing generator output with an energized bus |
| Gas Generator Sets | Matching generator frequency and phase before closing |
| Standby Power Systems | Controlled generator connection and parallel operation |
| Industrial Power Plants | Generator-to-bus synchronization |
| Cogeneration Systems | Connecting generation equipment to an existing bus |
| Parallel Generator Systems | Synchronizing multiple generating units |
| Engine-Generator Panels | Dedicated synchronization control |
| Distributed Generation | Coordinating generator connection to a local power system |
Installation and Maintenance
- Install the 9905-001K in the designated generator control-panel location.
- Verify the model number against the generator control-system documentation before installation.
- Confirm the generator and bus sensing circuits are connected according to the applicable wiring diagram.
- Check all terminal connections for correct identification and secure fastening.
- Verify the interface between the synchronizer and generator speed-control system.
- Check the connection between the synchronizer and generator breaker-control circuit.
- Confirm that voltage and frequency measurement signals are available and correctly referenced.
- Test the synchronization sequence during commissioning under controlled operating conditions.
- Observe generator speed correction to confirm that the incoming generator can approach the bus frequency.
- Inspect wiring and terminals periodically for looseness, corrosion, or mechanical damage.
- If synchronization becomes unstable or excessively slow, check sensing signals, speed-control response, synchronization settings, and breaker-control logic.
- After replacement, perform a complete synchronization and breaker-control test before returning the generator system to normal operation.
Compatible System Components
| Component | Function |
|---|---|
| Woodward Speed Control | Adjusts engine speed during synchronization |
| Automatic Voltage Regulator | Maintains generator voltage and excitation |
| Generator Voltage Sensing | Supplies generator electrical reference information |
| Bus Voltage Sensing | Supplies bus reference information |
| Generator Breaker | Connects the generator to the energized bus |
| Breaker Control Circuit | Executes the breaker operating sequence |
| Generator Protection Relay | Detects electrical faults and abnormal conditions |
| Generator Controller | Coordinates engine and generator operating functions |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Woodward SPM-A | Synchronizer | Generator synchronization |
| Woodward SPM-D | Digital Synchronizer | Generator synchronization and control |
| Woodward easYgen | Generator Controller | Engine-generator control |
| Woodward easYgen-300 | Generator Control System | Generator operation and synchronization |
| Woodward EGCP | Generator Control System | Generator paralleling and load control |
| Woodward DSLC | Load Sharing Controller | Generator load sharing and paralleling |
Key Advantages
- Dedicated synchronization function for generator control systems
- Supports controlled matching of generator and bus conditions
- Works with engine speed-control equipment during synchronization
- Suitable for generator paralleling applications
- Integrates with breaker-control circuits within generator panels
- Helps coordinate generator connection with the energized bus
- Applicable to industrial, standby, and distributed-generation systems
Technical FAQs
What is the purpose of the 9905-001K SPM-A in a generator system?
The 9905-001K is used to coordinate the synchronization of an incoming generator with an energized bus before the generator breaker is closed.
Which generator parameters are important during synchronization?
Generator frequency and phase relationship relative to the bus are fundamental synchronization conditions. The associated generator-control system also needs appropriate voltage sensing and speed-control response.
What could cause repeated unsuccessful synchronization attempts?
Possible causes include incorrect sensing connections, an unsuitable frequency difference, unstable engine-speed correction, incorrect synchronization settings, wiring problems, or an issue in the breaker-control circuit. These areas should be checked as a complete control chain.
Can the 9905-001K replace a complete generator controller?
No. The synchronizer is one part of the generator-control system. Functions such as engine control, excitation or voltage regulation, protection, load sharing, and overall generator sequencing require their corresponding control equipment.