Woodward 9905-096

Woodward 9905-096

Product Introduction
The Woodward 9905-096 is a specialized automatic generator loading controller designed to manage the load and unload operations of engine and generator sets. It is a critical component in load-sharing systems, ensuring the smooth and stable transfer of electrical loads during parallel or isolated bus operations.

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Description

Woodward 9905-096

Technical Specifications

  • Input Power Supply: 170-264 VAC, 50 or 60 Hz.
  • Power Consumption: 5 VA.
  • Control Outputs: Relay contacts for breaker operation and load adjustment.
  • Operating Temperature: Wide ambient temperature range for harsh industrial environments.

Functional Features

  • Smooth Load Transfer: Ensures stable load sharing and seamless transition between generators or utility power.
  • Base Load Setting: Allows operators to set a minimum operating load for the generator.
  • Unload Ramp: Features an adjustable unload ramp (5 seconds to 5 minutes) for controlled load reduction regardless of switch status.
  • Maximum Load Limit: Provides programmable maximum load protection to prevent engine overload.

Application Scenarios
Widely used in multi-generator power plants, microgrids, and industrial facilities requiring precise load management and seamless power transitions.

Performance Parameters

  • Stability: Highly resistant to power fluctuations, temperature variations, and humidity.
  • Response: Precise control over load ramp rates and base load values.

Material Composition
Constructed as a robust printed circuit board assembly housed within a protective metal chassis designed for panel mounting.

Structural Characteristics

  • Form Factor: Standard industrial control module.
  • Interface: Front-accessible potentiometers and terminal blocks for wiring and adjustments.

Working Principle
The controller monitors the generator’s output and compares it to the programmed base load and maximum limits. It actively adjusts the governor’s load setpoint to maintain the desired operating parameters, utilizing ramp timers to ensure that load changes occur gradually and safely.

Installation Requirements

  • Must be mounted in an enclosed electrical control cabinet.
  • Requires proper ventilation and protection from direct moisture or condensation.
  • Wiring must comply with industrial electrical standards.

Usage Precautions

  • Verify the input voltage matches the 115/230 VAC specification before energizing.
  • Carefully configure the unload ramp time to match the mechanical capabilities of the prime mover.
  • Do not exceed the maximum load limit settings during operation.

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