9905-990 断电跳闸型号 ProTech 203超速保护系统

【产品详情】

伍德沃德 Protech 203 超速保护型号 9905-990 设计为断电跳闸型号，可在 120 Vac/dc 的电源下运行。该模型用于读取磁性拾音器并执行速度计算。

9905-990装置由伍德沃德公司为其ProTech 203超速保护系统系列生产。Protech 系列中有两种不同的型号类型，通电到旅行和去能量到旅行;9905-990 型号设计为断电跳闸型号。断电跳闸模型使用起来最安全，因为它们将确保如果连接的原动机断电，它将使设备跳闸。

9905-990 型具有多项功能，使其成为超速保护装置的有效选择。这三个单元 A、B 和 C 是相同的速度感应单元，可以单独测试甚至更换。ProTech 型号 9905-990 使用三分之二的硬件投票配置，因此整个系统可以在至少两个单元在线的情况下保持运行。

在硬件投票继电器之前，三个单元独立运行，使用磁性拾音器（MPU）监控原动机速度（每5毫秒采样一次）并执行速度计算。如果满足超速条件，则激活跳闸继电器 。此过程的总响应时间最长为 40 毫秒。

9905-990 器件的速度感应频率范围为 100 Hz 至 32 kHz，跳变点频率范围为 250 Hz 至 25 kHz。该系统在整个工作温度下的精度等级为 0.05% 点 + 2 Hz，应安装在保护其免受电磁干扰和振动等物体影响的位置，在有足够的通风冷却空间中。

有关 9905-990 型号的功能和硬件配置的详细信息，请参阅随附的伍德沃德手册 85196。

关于 9905-990 的常见问题

9905-990型号附带哪些规格，它们的功能是什么？

9905-990 型号的一些规格包括热更换、远程复位、CPU 故障指示和速度感应频率范围。CPU 故障指示功能将确保单独的 LED 指示是否有任何 9905-990 的 CPU 性能不符合标准。9905-990 型号的热更换规格使设备的更换更加容易，因为它可以在设备运行的情况下进行更换，而不会导致跳闸。远程复位允许在远程位置重置本机。速度感应频率范围规格为 100 Hz 至 32 kHz。更多规格及其功能将在 85196 手册的第 <> 页到第 <> 页找到。

此模型可以在两种模式下运行;什么是首选模式？

两种模式是监控和编程;操作 9905-990 型号的首选模式是监视模式。虽然 9905-990 单元将在程序模式下运行，但在将型号配置为首选规格时更常用。

9905-990 断电跳闸型号 ProTech 203超速保护系统

【英文介绍】

The Woodward Protech 203 overspeed protection model 9905-990 is designed as a power trip model and can operate on a power supply of 120 Vac/dc. This model is used to read the magnetic pickup and perform speed calculations.

The 9905-990 unit is manufactured by Woodward for its ProTech 203 family of overspeed protection systems. There are two different model types in the Protech series, power-to-travel and power-to-travel; Model 9905-990 is designed as a power trip model. Power-off trip models are the safest to use because they will ensure that if the connected prime mover is powered off, it will trip the device.

The Model 9905-990 has a number of features that make it an effective choice for overspeed protection. These three units A, B, and C are the same speed sensing units and can be tested individually or even replaced. ProTech models 9905-990 use a two-thirds hardware voting configuration, so the entire system can be kept running with at least two units online.

Prior to the hardware voting relay, the three units operated independently, using a magnetic pickup (MPU) to monitor the prime mover speed (sampled every 5 milliseconds) and perform speed calculations. If the overspeed condition is met, the trip relay is activated. The total response time for this process is up to 40 milliseconds.

The 9905-990 device has a speed sensing frequency range of 100 Hz to 32 kHz and a jump point frequency range of 250 Hz to 25 kHz. The system has an accuracy rating of 0.05% point + 2 Hz over the entire operating temperature and should be installed in a location that protects it from objects such as electromagnetic interference and vibration, in a space with adequate ventilation and cooling.

For more information on the features and hardware configuration of the 9905-990 model, please refer to the enclosed Woodward manual 85196.

Frequently Asked Questions about 9905-990

What specifications come with models 9905-990 and what are their functions?

Some of the specifications for the 9905-990 model include hot replacement, remote reset, CPU failure indication, and speed sensing frequency range. The CPU Failure indicator function will ensure that a separate LED indicates if any of the 9905-990's CPU performance is not up to standard. The hot replacement specification of the 9905-990 model makes it easier to replace the equipment, as it can be replaced while the equipment is in operation without causing tripping. Remote reset Allows you to reset the unit in a remote location. Speed sensing frequency range specifications are 100 Hz to 32 kHz. More specifications and their features can be found on pages <> to <> of the 85196 manual.

This model can be run in two modes; What is the preferred mode?

The two modes are monitoring and programming; The preferred mode for operating the 9905-990 model is Monitor mode. Although the unit 9905-990 will operate in program mode, it is more commonly used when configuring the model to the preferred specification.

9905-990 断电跳闸型号 ProTech 203超速保护系统

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