9905-976 磁性拾音器 超速保护系统 WOODWARD
【产品详情】
ProTech 203 超速保护系统 9905-976 型读取三个单独的磁性拾音器并执行三个单独的速度计算
执行三个单独的速度计算，并进行三分之二的硬件投票，以确定是否满足超速条件。如果 三个速度感应单元中只有一个检测到超速情况，则只有该单元会跳闸。如果三个单元中的两个检测到这种情况，则会为整个 9905-976 系统激活跳闸继电器。这是伍德沃德ProTech 203系列中的激励旅行模型。
所有三个单元都与磁性拾音器（MPU）接口，以监控原动机速度。从速度采样（每 5 ms 进行一次）到触发跳闸继电器，ProTech 203 9905-976 超速保护系统的总体响应时间最长为 40 ms。 结合该器件的模块化设计和投票配置，9905-976 系统最大限度地减少了原动机停机时间。
型号 9905-976 中的单元 A、B 和 C 是相同的。它们均具有 120 Vac/dc 电源和操作员界面。虽然这些单元是单独编程的，但它们需要设置相同的参数才能使整个系统正常运行。
一些可调参数包括：
跳闸速度设定点（最小 250 rpm，最大 25,000 rpm）
MPU 失效设定点（最小 100 rpm，最大 25,000 rpm）
MPU 故障跳闸
9905-976 型号的可调参数的完整列表在伍德沃德 ProTech 203 手册 85195 中。本手册还包含其他设备规格和编程信息。
9905-976 磁性拾音器 超速保护系统 WOODWARD
【英文介绍】
The ProTech 203 Overspeed Protection System Type 9905-976 reads three separate magnetic pickups and performs three separate speed calculations
Three separate speed calculations are performed and a two-thirds hardware vote is taken to determine whether the overspeed condition is met. If only one of the three speed sensing units detects overspeed, only that unit will trip. If two of the three units detect this, the trip relay is activated for the entire 9905-976 system. This is an incentive travel model from the Woodward ProTech 203 series.
All three units interface with magnetic pickup (MPU) to monitor prime mover speed. From speed sampling (every 5 ms) to the trigger trip relay, the ProTech 203 9905-976 overspeed protection system has an overall response time of up to 40 ms. Combined with the device's modular design and voting configuration, the 9905-976 system minimizes prime mover downtime.
Units A, B, and C in Model 9905-976 are identical. They all have a 120 Vac/dc power supply and an operator interface. Although these units are programmed separately, they need to be set to the same parameters in order for the whole system to function properly.
Some adjustable parameters include:
Trip speed set point (min. 250 rpm, Max. 25,000 rpm)
MPU failure set point (minimum 100 rpm, maximum 25,000 rpm)
The MPU fails to trip
A complete list of adjustable parameters for the 9905-976 model is available in Woodward ProTech 203 manual 85195. This manual also contains additional device specifications and programming information.
9905-976 磁性拾音器 超速保护系统 WOODWARD
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