技术说明：8237-1246 WOODWARD ProTech-GII 可配置的超速检测系统
加速度检测
- 可选地，ProTech-GII也可以配置为保护涡轮机免受高加速度事件的影响。速度信号的导数用于检测涡轮机加速度并发出相关的跳闸命令。
微处理器检测
- 每个模块的速度传感器输入使用特殊的MPU明线检测电路，以在涡轮机运行前验证MPU是否正确连接，以及特殊的速度损失检测逻辑，以在涡轮机运行期间验证MPU功能。
自动超速测试程序
- 可选地，ProTech-GII可配置为定期对每个模块进行超速测试，然后记录并报告测试结果。在该测试程序中，每个模块都使用内部频率发生器来模拟超速情况，从而完成其测试序列。
抗硫污染
- ProTech-GII采用了一种特殊的保形涂层材料，这种材料在国际标准IEC 721-3-3 1994环境等级3C2中对H2S和二氧化硫气体具有良好的长期防护性能。
在线维修
- ProTech-GII的三模块设计允许用户在涡轮机在线并正常运行时轻松更换其中一个模块(A、B、C)。该单元的背板即插即用结构及其模块间学习功能增强了更换的便利性。
8237-1246
Acceleration Detection
- Optionally the ProTech-GII can be configured to protect a turbine from high acceleration events also. The derivative of the speed signal is used to detect turbine acceleration and issue an associated trip command.
MPU Detection
- Each module’s speed sensor input uses special MPU open-wire detection circuitry to validate that the MPU is properly connected before turbine operation, and special loss-of-speed detection logic to validate MPU functionality during turbine operation.
Automatic Overspeed Test Routine
- Optionally the ProTech-GII can be configured to routinely perform an overspeed test of each module, then log and report the test results. With this test routine, each module goes through its test sequence using an internal frequency generator to simulate an overspeed condition.
Sulfur Contamination Resistant
- The ProTech-GII utilizes a special conformal coating material that has demonstrated excellent long-term protection against H2S and SO2 gases at levels classified in international standard IEC 721-3-3 1994 – environment Class 3C2.
On-line Repair
- The ProTech-GII’s triple-modular design allows users to easily replace one of its modules (A, B, C) while the turbine is on-line and operating normally. Ease of replacement is enhanced by the unit’s backplane plug-and-operate structure, and its module-to-module learning function.
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