9905-871 数字超速跳闸装置 WOODWARD

【产品详情】

ProTech 203 数字超速跳闸装置，通过三个磁性拾音器 （MPU） 感应原动机速度。伍德沃德 型号 9905-871

使用 9905-871，操作员可以确保其免受超速条件的影响。该系统的三分之二投票配置仍将提供准确的输出，即使三个相同的速度传感单元中的一个离线。这些硬件投票是通过每个单元执行自己的速度计算，同时通过自己的磁性拾音器（MPU）监控原动机速度时实现的。当检测到超速情况时，会激活跳闸继电器。

当发生超速情况时，如果当前速度大于以前的峰值速度，则新的峰值速度将更新并存储在非易失性存储器中。任何单个速度传感单元的峰值速度和当前速度都可以在单元的操作界面LCD上查看。

除了 LCD 外，9905-871 中每个单元 的操作员界面还有一个触摸板和多个 LED。这些 LED 指示相应单元内硬件和系统的功能状态。有关 9905-871 操作和故障排除的详细信息，请参阅伍德沃德的 ProTech 203 超速保护系统手册 85191（B 版）。

9905-871 是一种断电跳闸型号。所有三个速度感应单元都有自己的 220 Vac 电源，电压范围为 180–264 Vac，7.25 W。 有关型号 9905-871 的其他规格和产品信息，请参阅手册 85191 （B）。

9905-871 数字超速跳闸装置 WOODWARD

【英文介绍】

The ProTech 203 digital overspeed trip device senses the prime mover speed via three magnetic pickups (MPUs). Woodward model 9905-871

With the 9905-871, the operator can ensure that it is protected from overspeed conditions. The system's two-thirds voting configuration will still provide accurate output, even if one of the three identical speed sensing units is offline. These hardware votes are achieved when each unit performs its own speed calculation while monitoring the prime mover speed via its own magnetic pickup (MPU). The trip relay is activated when overspeed is detected.

When an overspeed situation occurs, if the current speed is greater than the previous peak speed, the new peak speed is updated and stored in non-volatile memory. The peak speed and current speed of any individual speed sensing unit can be viewed on the unit's operating interface LCD.

In addition to the LCD, the operator interface of each unit in the 9905-871 has a touchpad and multiple leds. These leds indicate the functional status of the hardware and systems within the corresponding unit. For more information on the operation and troubleshooting of the 9905-871, see Woodward's ProTech 203 Overspeed Protection System Manual 85191 (Version B).

The 9905-871 is a power trip model. All three speed sensing units have their own 220 Vac power supply with a voltage range of 180-264 Vac, 7.25W. For additional specifications and product information on Model 9905-871, please refer to Manual 85191 (B).

9905-871 数字超速跳闸装置 WOODWARD

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