Product Description: Woodward 5461-770 505 Digital Steam Turbine Controller

Product Model: 5461-770

Brand: Woodward

Product Type: 505 Series Digital Steam Turbine Controller

I. Product Overview

The Woodward 5461-770 is a microprocessor-based dedicated steam turbine control system, belonging to the classic 505 controller series. It is specifically designed for single/double actuator steam turbines, providing full-process automation management from start-up, speed regulation, load control to protection. It is the core control unit for industrial steam turbines, compressor units, and power generation units.

Core Focus: Steam turbine speed control, extraction / makeup steam regulation, compressor anti-surge protection, grid load distribution

Compatible Series: Woodward 505, 505E, 505XT Control Systems

Product Form: Modular cards, standard 19-inch rack installation 

II. Core Technical Parameters

1. Electrical Specifications

Power Supply: 24 VDC (18–32 VDC)

Control Output:

PWM signal output (for driving electro-hydraulic converters, servo valves)

Relay output (for shutdown, alarm, status indication)

Output Accuracy: ≤ ±0.25% F.S.

Signal Input:

Speed Feedback: MPU electromagnetic sensor (2 redundant channels)

Analog: 4–20 mA / 1–5 VDC (remote setting, process feedback)

Digital: Start, Stop, Reset, Lock-up, Operation Allowance

Valve Position Feedback: LVDT/RVDT position sensor

Communication Interface: RS-232, RS-422

Electrical Isolation: Full isolation for input/output/power supply

Safety Certification: Class I, Div 2 explosion-proof certification

2. Mechanical and Environmental

Operating Temperature: -40°C ～ +70°C

Protection Grade: IP65

Installation Method: Standard 19-inch chassis / panel mounting

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

Weight: Approximately 1.0 kg

3. Control Performance

Control Modes:

Speed Control (ISO): Single unit constant speed operation

Load Control (Droop): Parallel / Grid load distribution

Steam Extraction / Supplement Steam Control: Industrial heating, process steam regulation

Compressor Control: Anti-surge, performance control

Speed Control Accuracy: ≤ ±0.01%

Control Algorithm: PID closed-loop regulation + feedforward control

Protection Functions:

Over-speed Protection (Overspeed Trip)

Low vacuum, low oil pressure, high exhaust temperature, shaft displacement protection

Sensor Fault, Actuator Fault Diagnosis

Overcurrent, Short Circuit, Reverse Power Supply Protection

III. Main Functional Characteristics

Professional Steam Turbine Control

Suitable for condensing, back pressure, steam extraction, and steam supplementation types of steam turbines.

Supports single valve / multiple valve control, precise regulation of steam flow.

Built-in industrial-level protection logic for anti-surge, overspeed trip, emergency cut-off, etc.

High Precision and High Dynamic Response

32-bit processor, millisecond-level response, precise and stable speed control.

Adaptive PID algorithm, excellent dynamic adjustment performance.

Wide power supply voltage range, adaptable to complex industrial power grids.

Highly reliable industrial design

-40°C ~ +70°C wide temperature range, IP65 protection, full isolation against interference.

Hardware-level fault protection, real-time self-diagnosis and alarm.

Parameter power-off retention, no disturbance recovery upon power-on.

Flexible integration and maintenance

Standard RS-232/RS-422 interface, supports Modbus communication.

Compatible with Woodward electro-hydraulic converters, servo valves, actuators.

Supports programming, monitoring, and debugging through ToolKit/Watcher software.

IV. Typical Application Scenarios

Industrial Steam Turbines: Drive pumps, compressors, fans, crushers

Combined Heat and Power: Steam extraction / back pressure units, combined control of heating + power generation

Compressor Units: Natural gas transportation, petrochemicals, air separation

Ship Power: Main propulsion steam turbine, marine steam turbine generator units

Power Plant Side Trays: Steam turbine side tray valves, temperature reduction and pressure reduction control

V. Product Advantages

Professional Level: 505 Series orthodox, benchmark in the field of steam turbine control

High Precision: 0.01% speed accuracy, precise and stable control

High Reliability: Wide temperature range, high protection, full isolation, long-life design

Multi-function: Integrated control of speed / load / steam extraction / anti-surge

Easy Maintenance: Remote programming, fault diagnosis, parameter backup convenience

VI. Model Code Interpretation

5461: Woodward industrial control module serial number 770: Hardware Configuration Code (505 Digital Controller, Dual Actuators, Extraction Steam Control, RS-232/422, 24VDC, Wide Temperature Range, IP65, Explosion-proof)

VII. Standard Complementary Accessories

Speed Sensor: MPU Electromagnetic Speed Probe

Actuators: Woodward Electro-hydraulic Converter (such as 8200 Series), Servo Valve

Connection Cables: Shielded Signal Cables, Communication Cables

Software Tools: Woodward ToolKit / Watcher Configuration and Debugging Software