9905-999  由三个相同的独立速度感应单元组成

【产品详情】

9905-999 Woodward ProTech 203 由三个相同的独立速度感应单元组成，可连续监控原动机速度，并在检测到超速情况时激活跳闸继电器。

产品型号 9905-999 是 120 Vac/dc 超速保护装置。这是一个伍德沃德ProTech断电跳闸模型，通过该模型的三个速度传感单元执行的三分之二投票来确定跳闸继电器状态。这些单元通过磁性拾音器 （MPU） 监控原动机速度。

该超速保护系统的跳变点频率范围为 250 Hz 至 25 kHz。速度感应频率范围为 100 Hz 至 32 kHz。

使用9905-999 型前面板上的三个操作界面对单元进行编程。每个速度感应单元都有一个接口，每个接口都有自己的 LCD、键盘、LED 指示灯和电位计旋钮。

型号 9905-999 系统中的三个单元是相同的。它们以三分之二的投票配置连接，这意味着至少 需要两个单元的超速检测才能提示跳闸继电器使操作脱机。如果检测到超速情况，任何设备都会跳闸，但没有单个单元会跳闸整个系统。

这种设计的一个好处是，这种超速保护装置可以处理单个单元的热更换。只要其他两个在线并正常运行，系统将保持在线并提供准确的输出。这也允许内置自检功能，因为型号 9905-999 将在两个单元控制的情况下运行。

有关完整功能信息，请参阅伍德沃德ProTech 203超速保护系统手册85196。

9905-999  由三个相同的独立速度感应单元组成

【英文介绍】

The 9905-999 Woodward ProTech 203 consists of three identical independent speed sensing units that continuously monitor the prime mover speed and activate the trip relay when overspeed conditions are detected.

Product Model 9905-999 is a 120 Vac/dc overspeed protection device. This is a Woodward ProTech power-off trip model in which the trip relay status is determined by a two-thirds vote performed by the model's three speed sensing units. These units monitor the prime mover speed via a magnetic pickup (MPU).

The overspeed protection system has a jump point frequency range of 250 Hz to 25 kHz. The speed sensing frequency range is 100 Hz to 32 kHz.

The unit is programmed using three operating interfaces on the front panel of the model 9905-999. Each speed sensing unit has an interface, each with its own LCD, keyboard, LED indicator and potentiometer knob.

The three units in the model 9905-999 system are identical. They are connected in a two-thirds voting configuration, which means that at least two units of overspeed detection are required to prompt the trip relay to take the operation offline. If overspeed is detected, any device will trip, but no single unit will trip the entire system.

One benefit of this design is that this overspeed protection can handle the thermal replacement of a single unit. As long as the other two are online and functioning properly, the system will remain online and provide accurate output. This also allows for a built-in self-check function, as models 9905-999 will operate with two unit controls.

For complete functional information, see Woodward ProTech 203 Overspeed Protection System Manual 85196.

9905-999  由三个相同的独立速度感应单元组成

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