9905-872 独立速度感应单元 监控原动机速度

【产品详情】

9905-872 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。

伍德沃德 9905-872 型是一种超速保护系统，可持续监控超速情况。该型号由三个独立的速度感应单元组成，所有单元都安装在一个锁定的IP65认证外壳中。9905-872 速度感应单元每个都与磁性拾音器 （MPU） 接口，每个单元都执行自己的速度计算。这些计算被置于三分之二的硬件投票中。

与 ProTech 203 系列中的其他超速保护设备一样，每个速度感应单元都有自己的电源。在 9905-872 系统中，单元 A 和单元 B 为 24 Vdc，而单元 C 为 120 Vac/dc。型号 9905-872 是断电跳闸版本。该型号每 5 ms 采样一次原动机速度，最大整体系统响应时间为 40 ms。

三单元设计和三分之二投票配置通过以下几种方式最大限度地减少整体系统停机时间：

如果单个单元跳闸，原动机可以保持在线

原动机可以在测试单个单元期间保持在线

原动机在线时可以更换速度感应单元

有关其工作原理的详细信息，请参阅伍德沃德ProTech 203超速保护系统手册85191（版本B）。

ProTech 203 99050872型号的其他功能包括用于故障MPU的LED指示灯，功能不正确的CPU和跳闸的速度感应单元（跳闸单元也有警报输出）;外壳的钥匙锁;和远程复位。

9905-872 独立速度感应单元 监控原动机速度

【英文介绍】

The 9905-872 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.

The Woodward Model 9905-872 is an overspeed protection system that continuously monitors overspeed conditions. The model consists of three separate speed sensing units, all housed in a locked IP65 certified housing. The 9905-872 speed sensing units each interface with a magnetic pickup (MPU), and each unit performs its own speed calculation. These calculations are placed in two-thirds of the hardware votes.

Like the other overspeed protection devices in the ProTech 203 series, each speed sensing unit has its own power supply. In the 9905-872 system, units A and B are 24 Vdc, while unit C is 120 Vac/dc. Model 9905-872 is the power-off trip version. This model samples the prime mover speed every 5 ms for a maximum overall system response time of 40 ms.

The three-cell design and two-thirds voting configuration minimize overall system downtime in several ways:

If a single unit trips, the prime mover can stay online

The prime mover can stay online during the testing of a single unit

The speed sensing unit can be replaced when the prime mover is online

For more information on how it works, see the Woodward ProTech 203 Overspeed Protection System Manual 85191 (version B).

Other features of the ProTech 203 99050872 model include an LED indicator for a faulty MPU, an incorrectly functioning CPU and a speed sensing unit for tripping (the tripping unit also has an alarm output); Shell key lock; And remote reset.

9905-872 独立速度感应单元 监控原动机速度

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