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Product Description
The 8440-1878 (DSLC-2) from Woodward is a microprocessor-controlled synchronizing and load management module designed for three-phase generator systems. It combines synchronizing control, real power load sharing, and process management in a single integrated unit.
Engineered for generator paralleling applications, this controller ensures precise matching of generator voltage, frequency, and phase before breaker closure. Once synchronized, the device automatically manages active load distribution and system stability across multiple generators operating on a common bus.
The DSLC-2 platform is widely deployed in industrial power plants, marine power systems, and standby generator installations where accurate synchronization and dependable load balancing are critical.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 8440-1878 (DSLC-2) |
| Manufacturer | Woodward |
| Device Type | Digital Synchronizer and Load Control Module |
| Generator System Type | Three-phase AC generator systems |
| Synchronizing Methods | Phase-matching synchronization, Slip-frequency synchronization |
| Current Inputs | 5 A CT inputs |
| Bus Voltage Input | 120 VAC / 480 VAC |
| Control Functions | Synchronizing, Load Control, VAR Control, Power Factor Control, Dead Bus Closing |
| Power Supply | 12 / 24 VDC |
| Communication Interfaces | 2 × Ethernet, 1 × RS-485, 1 × RS-232 |
| Relay Outputs | 12 / 24 VDC |
| Mounting | Rear panel installation |
| Dimensions | 250 × 227 × 84 mm |
| Weight | 2.95 lb |
| Operating Temperature | –40 °C to +70 °C |
| Certifications | UL, cUL, CSA, GOST-R |
Core Functional Capabilities
• Digital generator synchronizer for automatic breaker closure
• Integrated load sensor for active power sharing between generators
• Dead-bus closing functionality for black-start or bus restoration scenarios
• Reactive power control through VAR and power factor regulation
• Ethernet and serial communication for integration with SCADA or plant control networks
• Wide environmental operating range suitable for power plants and industrial facilities
Typical Application Scenarios
The 8440-1878 (DSLC-2) is commonly installed in generator control panels and power management systems where multiple generators must operate in parallel.
Typical installations include:
• Industrial standby and prime power plants
• Data center backup generator systems
• Marine and offshore generator control systems
• Utility peak-shaving generator installations
• Distributed energy or microgrid systems
In these environments the controller coordinates generator synchronization, ensures smooth breaker engagement, and balances electrical load between multiple machines.
Operational Considerations
Proper CT wiring and voltage sensing configuration are essential to guarantee accurate load sharing and synchronization performance. During commissioning, the synchronizing parameters such as voltage matching window, frequency slip limits, and phase angle tolerance should be configured according to the generator system design.
Periodic verification of synchronization accuracy and load distribution behavior is recommended as part of routine generator maintenance.
FAQ
What is the primary function of the DSLC-2 module?
It synchronizes generators to a common electrical bus and then manages load sharing between generators operating in parallel.
Can this module be connected to SCADA systems?
Yes. With Ethernet, RS-485, and RS-232 interfaces, the unit can communicate with supervisory control or plant monitoring systems.
Does the controller support dead-bus closing?
Yes. The DSLC-2 includes a dead-bus closing feature, allowing a generator to energize a de-energized bus during system start-up or restoration.
