9905-870 超速保护装置 速度感应单元

【产品详情】

伍德沃德 ProTech 203 电子三选二超速保护型号 9905-870，带 24V 直流输入、可锁定外壳、跳闸警报和 LED。

9905-870 超速保护装置中有三个独立的速度感应单元，所有单元都保存在同一个钥匙锁定的 IP65 认证外壳中。这三个相同的单元的配置方式是，单个磁性拾音器（MPU）与每个单元接口，每个单元执行的单独速度计算在三分之二的硬件投票中协同工作，以确定是否发生了超速情况。

在超速情况下，跳闸继电器被激活。设备跳闸后，需要复位或电源重启才能恢复正常运行。除了检测超速情况外，诸如MPU信号丢失，联锁故障或在涡轮机重新启动之前未复位之类的事情都可能导致跳闸。伍德沃德 ProTech 203 超速保护系统手册 85191 （B） 包含有关跳闸继电器故障排除的完整信息。

9905-870 型号中的三个速度感应单元是相同的。每个单元都配有自己的 120 Vac/dc 电源，每个单元都有一个单独的操作界面，带有 LCD、触摸板和功能状态 LED。在LCD上，操作员可以查看单个设备的实际速度，LED可以快速识别设备内的问题，例如MPU故障或CPU运行不正常。LED 和报警输出都用于提醒操作员装置跳闸。

9905-870 超速保护装置 速度感应单元

【英文介绍】

Woodward ProTech 203 Electronic 2 out of 3 overspeed protection Model 9905-870 with 24V DC input, lockable housing, trip alarm and LED.

There are three separate speed sensing units in the 9905-870 overspeed protection unit, all of which are kept in the same key-locked IP65-certified housing. These three identical units are configured in such a way that a single magnetic pickup (MPU) interfaces with each unit, and the individual speed calculations performed by each unit work together in a two-thirds hardware vote to determine if an overspeed situation has occurred.

In case of overspeed, the trip relay is activated. After the device trips, you need to reset or restart the power supply to restore the normal operation. In addition to detecting overspeed conditions, things such as MPU signal loss, interlock failure, or failure to reset before the turbine restarts can cause tripping. Woodward ProTech 203 Overspeed Protection System Manual 85191 (B) contains complete information on troubleshooting tripping relays.

The three speed sensing units in the model 9905-870 are identical. Each unit is equipped with its own 120 Vac/dc power supply, and each unit has a separate operating interface with an LCD, touchpad, and functional status LED. On the LCD, the operator can see the actual speed of a single device, and the LED can quickly identify problems within the device, such as MPU failure or CPU operating improperly. Both the LED and alarm outputs are used to alert the operator that the device is tripping.

9905-870 超速保护装置 速度感应单元

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