Description

The Woodward 9907-838 is a high-precision Load Sharing Module engineered for parallel generator set operations. It facilitates proportional load distribution among multiple prime movers equipped with Woodward electronic control systems. Widely utilized in decentralized power plants, offshore platforms, and emergency backup systems for mining operations, the module ensures system stability by equalizing real power (kW) loading. By preventing circulating currents and frequency fluctuations, the 9907-838 directly minimizes mechanical stress on the turbine or engine, significantly reducing the risk of unscheduled outages and optimizing fuel efficiency across the power grid.

Features

• Supports both isochronous and droop load-sharing modes for flexible grid synchronization.
• Provides corrective bias signals to speed controls based on generator output sensing.
• Integrated power sensing transformers and high-speed analog circuitry.
• Ruggedized construction designed for high-vibration industrial environments.
• Optical isolation to protect signal integrity from electromagnetic interference (EMI).
• Compact footprint for efficient control cabinet integration with low thermal dissipation.

Applications

This module is designed for use in multi-generator power systems where synchronized load sharing is required. Typical applications include:

• Decentralized power generation plants.
• Offshore oil and gas platform power systems.
• Emergency backup power for mining and industrial facilities.
• Marine vessel power management systems.

Technical Specifications

Installation Guidelines

• Ensure the control system is powered down before installing or removing the module to prevent electrical damage.
• Mount the module in a clean, dry environment within a control cabinet, ensuring adequate clearance for airflow.
• Use shielded cabling for all signal connections to maintain immunity against EMI/RFI.
• Verify that the sensing input voltage matches the generator output configuration (115 VAC or 230 VAC) prior to commissioning.
• Ensure proper grounding of the module chassis to the control panel common ground to reduce noise.
• Handle with standard ESD precautions to protect internal sensitive components.

FAQ

What is the primary function of the 9907-838?

The 9907-838 is designed to distribute real power (kW) loads proportionally among multiple generator sets operating in parallel, ensuring system stability and preventing circulating currents.

Can this module be used in high-vibration environments?

Yes, the 9907-838 features a ruggedized internal construction specifically designed to withstand the high-vibration conditions typical of engine and turbine environments.

Does this module require external power?

The unit has a low power consumption of 5 W maximum; please refer to the specific installation manual for the auxiliary power supply requirements for your control system configuration.