WoodWard 9907-149 速度感应单元中的每一个都有一个单独的电源

WoodWard 9907-149 速度感应单元中的每一个都有一个单独的电源

ProTech 型号 9907-149 是一款 120 Vac/dc 设备。该系统中的三个速度感应单元中的每一个都有一个单独的电源。这是这款伍德沃德超速保护装置模块化设计的一部分，可实现热更换单个单元和测试单个单元等功能，而无需使原动机脱机。

9907-149 型中的速度感应单元 A、B 和 C 是相同的。除了具有单独的电源外，这些装置还具有单独的操作界面和报警系统。这三个单元配置为三分之二的投票方法。在这次硬件投票之前，这三个单元独立运行，使用磁性拾音器（MPU）监控原动机速度，并单独执行速度计算。

构成 ProTech 型号 9907-149 的三个单元必须使用相同的跳变点进行编程。PROGRAM 模式可通过连接到所有三个单元的按键开关进入。由于伍德沃德系统采用模块化设计，因此可以单独对设备进行编程。

WoodWard 9907-149 速度感应单元中的每一个都有一个单独的电源

The ProTech model 9907-149 is a 120 Vac/dc device. Each of the three speed sensing units in the system has a separate power supply. This is part of the modular design of this Woodward Overspeed protection device, which enables functions such as hot replacement of individual units and testing of individual units without taking the prime mover offline.

The speed sensing units A, B, and C in the type 9907-149 are identical. In addition to having a separate power supply, these devices also have a separate operating interface and alarm system. These three cells are configured with a two-thirds voting method. Prior to this hardware vote, the three units operated independently, using magnetic pickups (MPUs) to monitor the prime mover speed and perform speed calculations separately.

The three units that make up ProTech Model 9907-149 must be programmed using the same jump point. PROGRAM mode can be accessed via key switches connected to all three units. Due to the modular design of the Woodward system, the device can be programmed separately.