WOODWARD 5403-977
English Specification / Datasheet
Product Brief Introduction
WOODWARD 5403-977 is a high-performance digital speed governor and control module designed for prime mover control systems, widely applied to steam turbines, gas turbines, diesel and gas engines in power generation, oil & gas and petrochemical industries. As a core component of Woodward’s digital control family, it integrates precise speed regulation, load control and fault diagnosis functions, supporting seamless connection with DCS and various Woodward controllers. With rugged industrial design, wide temperature tolerance and strong anti-interference ability, it ensures stable and reliable operation under harsh working conditions.
General Description
The WOODWARD 5403-977 is a microprocessor-based digital governor providing precision speed and load control for industrial prime movers. It accepts high-frequency speed signals and standard analog inputs (4–20 mA / 1–5 Vdc) for remote setpoint control, and outputs adjustable drive signals to electro-hydraulic actuators. The controller supports isochronous (zero droop) and droop control modes for stable grid parallel operation or isolated island operation. Built-in overspeed protection, speed limit, start-up control and comprehensive fault monitoring & alarm functions ensure unit safety. It adopts a compact panel-mount structure, with 24 VDC power supply, wide operating temperature range and strong vibration resistance, suitable for various harsh industrial environments.
Main Features
High-precision digital speed governing, supporting speed range 500–12000 Hz
Dual control modes: isochronous (zero droop) and droop (load sharing)
Accepts 4–20 mA / 1–5 Vdc remote setpoint signals; compatible with DCS and most Woodward controllers
Built-in overspeed trip protection, high/low speed limit and start-up fuel limiting
Comprehensive fault diagnosis, alarm and self-diagnosis functions
24 VDC ±10% power supply; operating temperature -40 °C to +85 °C
Compact panel-mount design, easy installation, debugging and maintenance
Industrial-grade EMC, shock and vibration resistance for harsh field conditions
Technical Parameters
Model: 5403-977
Type: Digital Speed Governor / Control Module
Applicable Prime Movers: Steam turbine, gas turbine, diesel engine, gas engine
Speed Input Range: 500–1500 Hz, 1000–3000 Hz, 2000–6000 Hz, 4000–12000 Hz
Setpoint Input: 4–20 mA / 1–5 Vdc
Control Modes: Isochronous (zero droop), Droop
Power Supply: 24 VDC ±10%
Operating Temperature: -40 °C to +85 °C
Storage Temperature: -55 °C to +105 °C
Weight: Approx. 1.1 kg
Installation: Cabinet panel mount
Protection: Overspeed trip, fault alarm, self-diagnosis
Application Scope
It is mainly used for speed regulation, load control and safety protection of industrial steam turbines, gas turbines, generator sets and engine-driven equipment in electric power, petroleum, chemical, mining and other industrial fields. It can be used for both new unit matching and old system transformation, providing reliable and efficient control solutions for prime mover systems。
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