Woodward has introduced a new overspeed detection system, the 8237-1246, as part of the ProTech-GII family, designed to protect steam, gas and water turbines of all sizes. The 8237-1246 system is designed to safely shut down the turbine when an overspeed or superacceleration event is sensed, ensuring the safety of equipment and personnel.

Features of the 8237-1246 system include:

Dual redundant tripping relay outputs, using a two-thirds voting architecture, or three independent non-voting tripping relay outputs.
Individual alarm relays, 4-20 mA speed readings, and Modbus communications are easy to integrate into any steam turbine safety system.

8237-1246

Configurable to protect turbines from high acceleration events, the derivative of the speed signal is used to detect turbine acceleration and issue the relevant trip command.
The speed sensor input in each module uses a special MPU open detection circuit to verify that the MPU is properly connected before turbine operation, and a special speed loss detection logic to verify MPU function during turbine operation.
It can be configured to perform periodic overspeed tests on each module and then record and report the test results.
Using special conformal coating material, it has good long-term protection against H2S and SO2 gas.
The three-module design allows users to easily replace one of the modules when the turbine is online and operating normally.
The 8237-1246 is designed to meet the requirements of API670 and API612 and is certified by IEC61508 SIL-3 to ensure its high reliability. This product is expected to play an important role in power generation, petroleum, chemical, metallurgy, paper and other industries, providing a strong guarantee for industrial safety.