Product Description: Woodward 5461-771 Digital Speed Controller

Product Model: 5461-771

Brand: Woodward

Product Type: 505 Series Digital Speed Controller

I. Product Overview

The Woodward 5461-771 is a high-performance digital speed control and synchronization controller based on a microprocessor, designed for generator sets, engines, and steam turbines. It integrates precise speed control, automatic synchronization, load distribution, and protection functions, making it the core control unit for industrial power generation, ship propulsion, and mobile power stations.

Core Focus: Speed / Load Control, Automatic Synchronization, Parallel Operation, Generator Protection

Compatible Series: Woodward 505, 2301A, 723 Control System

Product Form: Modular Card, Standard Cabinet Installation

II. Core Technical Parameters

1. Electrical Specifications

Power Supply: 24 VDC (18–32 VDC)

Control Outputs:

Low Current PWM Output (for driving servo valves, electro-hydraulic converters)

Relay Outputs (for synchronization completion, alarm, shutdown)

Output Accuracy: ≤ ±0.25% F.S.

Signal Inputs:

Speed Feedback: MPU Electromagnetic Sensor

Analog: 4–20 mA / 1–5 VDC (Speed Setting, Process Feedback)

Switching: Start, Stop, Reset, Synchronization Allowance

Voltage Feedback: Monitoring of Generator Three-Phase Voltage

Communication Interfaces: Independent RS-232 & RS-422 Serial Ports

Electrical Isolation: Input / Output / Power Three-Port Full Isolation

Safety Certification: Class I, Div 2 Explosion-proof Certification

2. Mechanical and Environmental

Operating Temperature: -40°C ～ +85°C

Protection Grade: IP65

Installation Method: Standard 19-inch Rack / Rail Installation

Anti-Vibration / Shock: Compliant with MIL-STD-810F

Weight: Approximately 1.0 kg

3. Control Performance

Control Modes:

Isochronous (No Differential Speed): Single Machine Constant Speed Operation

Droop (With Differential Speed): Parallel / Grid Load Distribution

Automatic Synchronization (Auto Synchronizing): Automatic Frequency, Phase, Voltage Matching

Load Control: Base Load, Peak Load, Power Factor Regulation

Speed Control Accuracy: ≤ ±0.01%

Synchronization Accuracy: Frequency Difference ≤ ±0.01 Hz, Phase Difference ≤ ±1°

Regulation Algorithm: PID Closed-Loop Regulation + Feedforward Control

Protection Functions:

Over-speed / Under-speed Protection

Over/Under Voltage, Over/Under Frequency Protection

Reverse Power, Overload Protection

Sensor Fault, Actuator Fault Diagnosis

III. Main Functional Characteristics

High Precision Speed and Synchronization

Supports two speed control modes (Isochronous / Droop), suitable for single-machine / parallel operation.

Built-in Automatic Synchronizer for seamless grid connection of generators.

32-bit Processor, Millisecond-level Dynamic Response, Speed Control Accuracy up to 0.01%.

Multi-functional Power Generation Control

Integrated Speed, Voltage Regulation, Load Distribution, Protection Functions.

Supports single-machine, parallel, islanding, grid connection operation modes.

Precise Control of Active / Reactive Power, Optimizing Power Generation Efficiency.

Highly Reliable Industrial Design

**-40°C ~ +85°C** Wide Temperature, IP65 Protection, Full Isolation Anti-Interference.

Hardware-level Fault Protection, Real-time Self-Diagnosis and Alarm Output.

Parameter Power-off Storage, Power-on Smooth Recovery.

Flexible System Integration Standard RS-232/RS-422 interface, supporting Modbus communication.

Compatible with all models of Woodward actuators and voltage regulators.

Supports remote monitoring, programming, and fault diagnosis.

IV. Typical Application Scenarios

Industrial generator sets: Diesel / gas engine-driven backup / regular power supply

Ship power stations: Main / auxiliary generator control, paralleling and load distribution

Combined heat and power: Steam turbine / gas turbine generator sets

Mobile power stations: Oilfield, mining, field operation mobile power generation

Isolated power grids: Remote control of remote areas independent power grids

V. Product Advantages

All-in-one: Speed control + synchronization + voltage regulation + protection integrated, single module solves power generation control

High precision: 0.01% speed regulation accuracy, stable grid connection without impact

High reliability: Wide temperature range, high protection, full isolation, long service life design

Strong compatibility: Fully compatible with diesel / gas / steam turbine

Easy maintenance: Remote programming, fault diagnosis, parameter backup convenient

VI. Model Code Interpretation

5461: Woodward industrial control module serial number

771: Hardware configuration code (505 digital speed controller, automatic synchronization, RS-232/422, 24VDC, wide temperature range, IP65, explosion-proof)

VII. Standard Accessories

Speed sensor: MPU electromagnetic speed probe

Actuator: Woodward electro-hydraulic converter, servo valve

Connection cable: Shielded signal cable, communication cable

Software tools: Woodward ToolKit configuration and debugging software