Woodward 9907-355 Circuit Breaker Controller

Description

Woodward 9907-355 Circuit Breaker Controller

Product Dimensions：

The Woodward Circuit Breaker Controller series (most notably the LS-5 and DSLC-2 families) are high-end, programmable control units designed to manage complex power distribution systems. They synchronize, protect, and control circuit breakers in applications ranging from simple standby power to complex multi-generator microgrids.

Product Overview

Woodward controllers act as the “brain” for circuit breakers. They manage the synchronization of different power sources (e.g., generator to bus, or bus to utility) and ensure that closing the breaker is done safely and efficiently.

1. Technical Specifications (General Range)

While specific parameters depend on the model (e.g., LS-511 vs. LS-521), here are the standard technical benchmarks:

• Power Supply: Wide range, typically 12/24V DC (8 to 32V DC).

• Voltage Input: 100 to 480V AC (True RMS).

• Current Input: 1A or 5A (Secondary).

• Frequency Range: 50/60 Hz (40 to 70 Hz range).

• Operating Temperature: -20°C to +70°C.

• Communication: CAN bus (CANopen), Ethernet, and RS-485 (Modbus RTU).

• Protection Class: Front panel IP65 (when gasketed).

2. Key Product Advantages

• Seamless Synchronization: Features “Check-Sync” and “Auto-Sync” modes to ensure phase, voltage, and frequency match perfectly before the breaker closes.

• Integrated Protection: Includes comprehensive electrical protection (Over/Under Voltage, Over/Under Frequency, Reverse Power, and Phase Shift).

• Reduced Wiring: Through CAN bus communication, these controllers “talk” to Woodward engine controllers (like the EasyGen series), significantly reducing the need for hardwired I/O.

• Multi-Segment Control: The LS-5 series can manage complex bus-tie breakers, allowing for the segmentation of power grids for maintenance or fault isolation.

• Flexible Mounting: Options for back-panel mounting (liquid crystal display removed) or front-door mounting with a high-resolution display.

3. Product Applications

Woodward controllers are found in critical power environments where downtime is not an option:

• Microgrids: Managing the connection between renewables, battery storage, and the main utility grid.

• Data Centers: Rapid synchronization of backup generators during a utility failure.

• Marine & Offshore: Controlling bus-tie breakers on ships to ensure propulsion power remains stable.

• Industrial Plants: Managing “Peak Shaving” operations where the facility switches between grid and internal power to save costs.

• Hospitals: Ensuring life-safety systems transition smoothly to emergency power.

4. Important Considerations (Usage Notes)

• CT Polarity: Ensure Current Transformer (CT) polarity is correct. Reversed CTs will result in incorrect power readings and may cause the breaker to trip unnecessarily.

• Firmware Compatibility: If using the LS-5 in conjunction with EasyGen controllers, ensure all units are running compatible firmware versions to prevent CAN bus communication errors.

• Phase Rotation: Always verify that the phase rotation (L1, L2, L3) of the bus and the generator match the controller settings before attempting an automatic sync.

• Burden Limits: Do not exceed the maximum current/voltage burden specified in the manual, as this can lead to overheating or inaccurate sensing.

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