5461-775 - Ambient Bias Load Sharing Module

SPECIFICATIONS:

Part Number: 5461-775
Manufacturer: Woodward
Product type: Ambient Bias Load Sharing Module
Power Supply: 24 VDC (±10%)
Maximum Operating Current: 12 V
Mounting: Panel or DIN rail mounting
Input Signals: 4–20 mA or ±10 VDC
Number of channels: 2
Update time: 5 milliseconds
Operating Temperature: -20°C to +70°C
Isolation Protection: 3000 VDC
Power Supply: 10 - 60 VDC
Availability: In Stock
Weight: 2 lbs
Country of Manufacture: United States

FUNCTIONAL DESCRIPTION:

5461-775 is an Ambient Bias Load Sharing Module manufactured and designed by Woodward as part of the 5400 Series used in Turbine Control Systems. It‘s a specialized device designed to optimize load distribution among multiple generators operating in parallel. It compensates for variations in ambient conditions, such as temperature or humidity, which can impact generator performance. By monitoring environmental parameters through connected sensors, the module generates bias signals to adjust load-sharing setpoints dynamically, ensuring proportional and balanced load distribution across all generators.

INSTALLATION:

• Choose a location in a controlled environment, free from excessive vibration, moisture, and temperature extremes. Install the module in a generator control panel or an enclosure rated for the operating environment (e.g., IP54 or higher).

• Connect the module to a stable 24 VDC power source, observing polarity. Connect ambient condition sensors (temperature, pressure, or humidity) to the input terminals. Use shielded cables to minimize electrical interference.

• Wire the bias output to the generator control system, such as the governor or Automatic Voltage Regulator (AVR). Verify compatibility of signal ranges (e.g., ±10 VDC or 4–20 mA). Ensure proper grounding of the module and signal shields to avoid noise and interference.

OPERATION:

• The module continuously monitors ambient conditions via connected sensors. Generates bias signals that adjust the load-sharing setpoints based on temperature, humidity, or pressure variations.

• Interfaces with Woodward load-sharing controllers to fine-tune active power sharing among generators. Bias signals ensure all generators contribute proportionally, even under varying environmental conditions.

• Provides feedback to the control panel for real-time diagnostics and performance monitoring. Alert operators if discrepancies in load sharing or sensor readings exceed predefined thresholds.

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FREQUENTLY ASKED QUESTIONS:

What is the primary purpose of an Ambient Bias Load Sharing Module?

The module compensates for environmental variations such as temperature or humidity, ensuring accurate and proportional load sharing among generators operating in parallel. It enhances system stability and efficiency, especially in varying ambient conditions.

How does the module integrate with a generator system?

It connects to the generator’s control components, including the Automatic Voltage Regulator (AVR), governor, and load-sharing controller. The module adjusts the load-sharing setpoints based on ambient condition inputs, ensuring balanced operation.

What are the typical input signals for the module?

The inputs include signals from ambient condition sensors, such as temperature, pressure, or humidity sensors, as well as load-sharing inputs from other control devices. These signals are typically in the form of 4–20 mA or ±10 VDC.