Overview
Manuals
Industrial Applications
Key Operational Features
Features:
- ProTech 203 Overspeed Protection
- It is designed to safeguard gas turbines, steam turbines, engines, and large pumps from catastrophic mechanical failure due to overspeed conditions
- The unit houses three isolated microprocessors, each reading its own dedicated magnetic pickup (MPU) channel
The Woodward 8200-203 is a highly reliable digital overspeed protection system (part of the ProTech 203 series) designed specifically for industrial rotating machinery. Powered by a 120Vac/dc power supply, its core function is to provide safety protection for prime movers such as steam turbines, gas turbines, large compressors, and pumps. It can monitor the operating speed of the equipment in real time with high precision (typically with a sampling period of 5 milliseconds) and quickly issue a trip control signal when the speed exceeds a preset safety limit, forcibly cutting off the power supply to prevent catastrophic runaway accidents.
In terms of system configuration and maintenance, this module features excellent redundancy and fault tolerance, as well as rich field interaction functions. It employs a "power failure trip" design, ensuring that safety protection mechanisms are triggered even if the control power supply is unexpectedly interrupted. The module's front panel integrates a digital LCD display, LED status indicators, and field buttons, supporting remote reset, built-in self-test (the built-in frequency generator allows for functional testing of individual units while the equipment is online), and a mechanical key lock to prevent unauthorized tampering.
The 8200-203 Woodward ProTech 203 Overspeed Protection may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Woodward 8200-203 ProTech 203 Overspeed Protection datasheet(manual), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
1.Steam Turbine Generator Sets: Monitors large high-pressure and low-pressure steam turbines driving utility generators. If a grid disconnection causes a sudden load drop, the 8200-203 detects rapid acceleration and closes the main steam shut-off valve before mechanical damage occurs.
2.Gas Turbine Sets: Suitable for industrial gas turbines used in baseload or peak-shaving power plants (e.g., older GE, Solar, or Siemens units).
3.Hydraulic Turbines: Monitors hydraulically driven turbines to prevent sudden water hammer or governor failures from causing rotor speeds to exceed structural design limits.
4.Mechanically Driven Steam Turbines: Protects turbines used to drive large process equipment, not generators.
5.Centrifugal Compressor Sets: Installed in liquefied natural gas (LNG) plants, pipelines, and refineries, where large compressors are driven by steam turbines or gas turbines.
6.It ensures that the speeds of both the drive unit (turbine) and the driven equipment (compressor) do not exceed critical values.
7.Main oil pump: Protects large-capacity turbine-driven crude oil pumps operating on offshore platforms or remote pipeline pumping stations. Ethylene and ammonia plants: Monitors gas compressors and syngas units driven by multi-stage turbines.
8.Blast furnace blowers: Protects large-capacity turbine-driven blowers and fans supplying oxygen to chemical reactors or heavy metallurgical blast furnaces.
1. True 2003 (3/3) Voting Logic: Triple Redundancy: The unit contains three independent microprocessors, each reading its dedicated Magnetic Pickup Unit (MPU) channel.
High Availability: The system trips the prime mover only if two of the three microprocessors unanimously agree that an overspeed or fault condition exists.
Online Maintenance: If a module fails or requires testing, it can be bypassed or hot-swapped while the machine remains safely online.
2. Testability and Safety: Built-in Speed Simulator: Equipped with an internal frequency generator. This allows operators to safely perform dynamic overspeed tests on each channel without actually overspeeding the turbine.
Physical Key Switch: A mechanical locking key is provided on the front door to prevent unauthorized configuration changes or accidental trip tests.
3. Output Relays: Includes dedicated, isolated trip relay outputs connected in series-parallel configurations for executing hardware trip signals to vote, thereby controlling the turbine's emergency stop (ESD) trip valve.
