Woodward 9907-175

Product Overview

The Woodward 9907-175 is a load sharing module designed for generator sets equipped with Caterpillar digital speed controls that accept a pulse-width modulation (PWM) input. It enables load sharing between compatible generator sets and helps integrate Caterpillar-controlled engines with Woodward electronic control systems.

By coordinating load signals and speed-control commands, the module supports stable generator operation in applications that require multiple power sources to work together.

Technical Specifications

The specifications above summarize the documented configuration. Confirm wiring requirements and system compatibility before ordering or installation.

Main Features

• Generator load coordination: Supports load sharing between compatible generator sets.
• Flexible operating modes: Provides isochronous and droop load-sharing functions for different power-generation requirements.
• PWM output: Sends a control signal to compatible Caterpillar digital speed-control equipment.
• System integration: Works with suitable synchronizers and other Woodward generator-control accessories.
• Adjustable operation: Supports load-gain and droop adjustments during system commissioning.

These functions help operators coordinate generator output and maintain reliable performance in multi-generator installations.

Structure and Operating Principle

The module receives generator voltage and current signals through its input terminals. Internal sensing and comparison circuits process these signals to determine the load-sharing requirements.

It then produces a PWM output that interfaces with the compatible engine speed controller. Additional connections support synchronization and speed trimming when required by the system configuration.

Typical Applications

This unit is suitable for:

• Industrial power generation systems
• Caterpillar engine generator sets
• Multi-generator load-sharing installations
• Standby and auxiliary power systems
• Marine and industrial generator applications

Installation and Maintenance

Install the module in a suitable control cabinet and follow the manufacturer’s wiring diagrams. Check the 24 VDC supply, current-transformer polarity, voltage-sensing connections, and PWM output wiring before commissioning.

Use shielded signal cables where specified, and keep signal wiring away from high-current conductors. During maintenance, inspect terminal connections and verify load-sharing performance under controlled operating conditions. Qualified personnel should perform commissioning and troubleshooting according to Woodward Manual 02036.