WOODWARD 5441-673 Product Detailed Description

Product Model: WOODWARD 5441-673

Brand: WOODWARD (Woodward)

Product Type: NetCon 5000 / MicroNet Series Digital Synchronizer / Automatic Synchronizer Module

Generation Date: 2026-05-18 11:34:42

I. Product Overview

WOODWARD 5441-5441-673 is a dedicated automatic synchronization controller module for the NetCon 5000 and MicroNet control systems. It is specifically designed for generator sets (diesel / gas / steam turbines), with its core function being to achieve fully automatic and high-precision synchronous grid connection of the generator with the grid (or busbar), ensuring a smooth and safe stable parallel operation. This module is a discontinued model, and the market mainly circulates refurbished / spare parts. 

II. Core Functional Characteristics

Fully automatic synchronous grid connection: Automatically detects and adjusts the frequency, voltage, and phase angle of the generator, precisely matching it with the operating grid to achieve a seamless power-on without any impact.

Dual-mode synchronous control:

Automatic mode (Auto): Fully automatic adjustment, no need for manual intervention.

Semi-automatic mode (Semi-Auto): Assists with precise fine-tuning by humans.

High-precision synchronous detection:

Frequency difference: < 0.01 Hz

Voltage difference: < 1%

Phase difference: < ± 0.5°

Dual independent communication: Equipped with RS-232 and RS-422 dual independent serial ports for parameter configuration, status monitoring, and communication with the DCS system.

Multiple safety protections: Built-in synchronous failure protection, voltage abnormality protection, frequency over-limit protection to prevent accidental power-on and damage to equipment.

PWM drive output: Provides low-current PWM pulse output for precise driving of the governor and AVR for dynamic adjustment.

Hot-swappable and self-diagnostic: Supports hot-swapping, featuring comprehensive fault self-diagnosis and LED status indication, facilitating quick maintenance.

Industrial-grade reliability: Fully isolated, wide temperature design, suitable for harsh industrial environments in power plants, petrochemicals, ships, etc.

III. Technical Specifications

1. Core Control Parameters

Control type: Fully digital automatic synchronous controller

Control cycle: < 10 ms

Synchronous accuracy: Frequency ± 0.01 Hz, phase ± 0.5°, voltage ± 1%

Controlled objects: Generator speed (Governor), excitation voltage (AVR)

Grid connection control: Automatically issues circuit breaker closing instructions

2. Input and Output Interfaces

Voltage input: 3-phase AC voltage signals (generator side & grid side)

Speed input: 1 channel, MPU eddy current sensor signal

Analog output: 2 channels (speed regulation, voltage regulation), 4-20mA / 0-10V

Switching I/O: 8 channels DI (synchronous allowed / reset), 8 channels DO (closing instruction / alarm)

Communication interface: RS-232, RS-422 (independent dual ports)

Isolation voltage: 2500 V AC (full electrical isolation)

3. Physical and Environmental Specifications

Size (W×H×D): 229 mm × 178 mm × 45 mm

Weight: Approximately 0.95 kg

Operating power supply: 24 VDC ±10%

Operating temperature range: -40°C ~ +70°C

Protection class: IP20

4. Product Status

Product status: Discontinued (Out of Production)

Alternative model: 8440-1706 (SPM-D11) (New generation digital synchronous and load sharer, in service)

Series positioning:

5441-635: CPU main controller (Out of Production)

5441-673: Automatic synchronous controller (Out of Production)

5441-669: Synchronous / Load Sharing Module (Out of Production)

5441-671: Digital Speed Control Module (Out of Production)

IV. Typical Application Scenarios

Automatic grid connection of generators: Single / multiple diesel generators, gas generators, steam turbine generators automatically connected to the public grid or islanded busbar.

Non-impact parallel control: Multi-machine parallel operation in emergency power stations, self-contained power plants, ship power stations, achieving smooth, safe, and rapid grid connection.

Grid synchronous switching: Dual power supply systems, UPS systems' non-disruptive synchronous switching control.

Power station automation: Fully automatic synchronous, remote monitoring, fault alarm for unmanned power stations.

V. System Configuration and Compatibility

1. Essential Supporting Components

Main controller: 5441-635, 5435 series CPU Power Module: 5439-766 (24VDC System Power Supply)

I/O Module: 5437 Series (AI/AO), 5441 Series (Relay)

Actuator: Electronic Speed Controller, Automatic Voltage Regulator (AVR)

Sensor: MPU Electromagnetic Flow Sensor, Voltage Transformer

2. Compatible Systems

Fully Compatible: NetCon 5000, MicroNet Control System

Specifically Compatible: WOODWARD 505/505E, 723/723+ Controller

VI. Quality and Service

Origin: USA (WOODWARD Original Factory)

Warranty: Refurbished / Spare Parts Offered for 6-12 Months Warranty

Service: Module Testing, Parameter Configuration, Fault Diagnosis, Technical Support