8237-1246 | 可配置的超速检测系统 |  带有单独的报警继电器

型号：8237-1246

特征 ：抗振性 0.04 G2/Hz，1.04 Grms，10 至 500 Hz

高压输入 :每个模块 90–264 Vac/47–63 Hz 或 100–150 Vdc @ 30 W

键盘/显示器： 4.2 英寸显示屏 （3）

标称高输出电压： 115 伏交流电 / 240 伏交流电 / 125 伏直流电

标称低输出电压： 24 伏直流电

工作温度： –4 至 +140 °F

储存温度: –4 至 +158 °F

重量 :小于 27 磅

8237-1246是一种可配置的超速检测系统，设计用于在感应到超速或超加速事件时安全关闭各种尺寸的蒸汽轮机、燃气轮机和水轮机。提供两个双冗余跳闸继电器输出，采用三分之二投票架构，或三个独立的非投票跳闸继电器输出，带有单独的报警继电器、4–20 mA 速

加速度检测

此外，8237-1246 还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。

MPU检测

每个模块的速度传感器输入都使用特殊的 MPU 开路检测电路来验证 MPU 在涡轮机运行前是否正确连接，并使用特殊的速度损失检测逻辑来验证涡轮机运行期间的 MPU 功能。

自动超速测试程序

或者，ProTech-GII可以配置为对每个模块进行例行超速测试，然后记录和报告测试结果。在此测试例程中，每个模块都使用内部频率发生器完成其测试序列，以模拟超速情况。

Model: 8237-1246

Characteristics: Vibration resistance 0.04 G2/Hz, 1.04 Grms, 10 to 500 Hz

High voltage input: 90-264 Vac/ 47-63 Hz or 100-150 Vdc @ 30 W per module

Keyboard/Monitor: 4.2-inch display (3)

Nominal high output voltage: 115 volts AC / 240 volts AC / 125 volts DC

Nominal low output voltage: 24 volts DC

Operating temperature: -4 to +140 °F

Storage temperature: -4 to +158 °F

Weight: Less than 27 pounds

The 8237-1246 is a configurable overspeed detection system designed to safely shut down steam, gas and water turbines of all sizes when an overspeed or superacceleration event is sensed. Available with two dual redundant tripping relay outputs in a two-thirds voting architecture or three separate non-voting tripping relay outputs with separate alarm relays at 4-20 mA speeds

Acceleration detection

In addition, the 8237-1246 can be configured to protect the turbine from high acceleration events. The derivative of the speed signal is used to detect the turbine acceleration and issue the relevant trip command.

MPU detection

Each module's speed sensor input uses a special MPU open detection circuit to verify that the MPU is properly connected prior to turbine operation, and a special speed loss detection logic to verify MPU function during turbine operation.

Automatic overspeed test program

Alternatively, ProTech-GII can be configured to perform routine overspeed tests on each module and then record and report the test results. In this test routine, each module completes its test sequence using an internal frequency generator to simulate overspeed conditions.