WOODWARD 5437-1067A Reliability Independent Module

The Woodward 5437-1067A is a high-reliability individual module for the ProTech-GII series.

It is a critical component of Woodward's Safety Integrity Level 3 (SIL-3) overspeed protection system, specifically designed to monitor and protect steam, gas, and hydro turbines from catastrophic overspeed or over-acceleration events.

Technical Parameter Table

Related Models

The 5437-1067A is typically part of a triple-modular redundant (TMR) system:

8237-1246 / 8237-1369: The main bulkhead or panel-mount assemblies this module fits into.

5437-1078 / 5437-1119: Alternate spare modules with different relay or voltage configurations.

9927-1180: ProTech-GII Service Tool (software for configuration).

Application Cases

Nuclear & Fossil Power Plants: Used as the primary safety barrier for large-scale steam turbines to prevent runaway scenarios.

Mechanical Drive Turbines: Protecting turbines that drive compressors in oil refineries and gas processing plants.

Hydroelectric Dams: Managing the synchronization and emergency shutdown of water turbines.

Marine Propulsion: Installed on naval and commercial vessels to ensure engine safety in high-vibration maritime environments.

Product Advantages and Features

Triple Modular Redundancy (TMR): Operates in a 2-out-of-3 (2oo3) voting logic. This ensures that a single module failure will not cause a nuisance trip or a failure to trip.

On-Line Repair: The modular design allows a single module (like the 5437-1067A) to be replaced while the turbine is running, significantly reducing plant downtime.

Acceleration Protection: Unlike basic overspeed trips, it calculates the rate of speed change (acceleration) to predict and prevent overspeed before it happens.

Integrated Logging: Maintains internal logs for the last 50 trips/alarms and 20 overspeed events with high-resolution timestamps.

Ruggedized Construction: Features sulfur-resistant conformal coating, making it suitable for Class 3C2 corrosive environments.

Other Models in the Same Series

The ProTech-GII family is distinguished by its mounting and output types:

Bulkhead Mount Series: Designed for wall or skid mounting (e.g., 8237-1246).

Panel Mount Series: Designed for flush-mounting within a control cabinet (e.g., 8237-1600).

Voted Relay vs. Independent Relay: Depending on the model, the relays are either pre-voted internally or output independently to an external safety PLC.

English Introduction

The Woodward 5437-1067A is a specialized module for the ProTech-GII overspeed safety system.

It serves as a high-precision, microprocessor-based monitor that interfaces directly with magnetic speed sensors.

By utilizing 2-out-of-3 voting, the 5437-1067A provides the highest level of system availability and reliability, meeting global SIL-3 safety standards.

Its ability to be "hot-swapped" during operation and its advanced diagnostics make it a gold standard for protecting multi-million dollar rotating assets in the energy and processing industries.