9905-878 断电跳闸型号 超速保护系统

【产品详情】

9905-878型号是断电跳闸型号，是伍德沃德生产的ProTech 203超速保护系统的一部分。该型号在 24 VDC 下工作。9905-878 设备上的存储模块为 NEMA 4X。

伍德沃德的 ProTech 203 型号 9905-878 专为可靠的超速保护而设计。该模型只是众多ProTech 203模型之一。两个版本在 A、B 和 C 单元中具有相同的电源。其中之一是9905-878单元，另一个是9905-869，它具有NEMA 4外壳，使两者不同。这种三分之二的硬件投票设备允许正常运行，并提供准确的输出，前提是三个速度传感单元中的两个在线，这允许热更换，并在原动机在线时测试单个单元，并在其中一个单元跳闸时继续操作。单个 MPU 故障不会发生意外的涡轮机跳闸。

9905-878 型中的三个速度感应单元中的每一个都有一个 24 Vdc 电源（18–32 Vdc，7.25 W 电压范围）。每个器件均产生+5 V和+24 V，与输入电压隔离。所有三个单元都位于同一机箱中。此 ProTech 203 型号的锁定外壳经过 NEMA 4X 认证，只要它使用可选的不锈钢轮毂。

这是一种断电跳闸模型。它在每个单元上都有 LED 指示灯，以提醒操作员设备跳闸、MPU 故障或 CPU 故障。还有一个报警输出，用于通知跳闸的设备。

跳闸的机组在重新联机之前必须复位（或重新通电），并且每个机组必须在启动涡轮机之前复位。9905-878 超速保护系统包括方便的远程复位功能。

型号 9905-878 的安装和操作手册是伍德沃德的 ProTech 203 超速保护系统手册 85191（B 版）。在本手册中，您可以找到其他产品规格、安装位置要求、编程说明等。

当连接到 9905-878 型号的附加原动机未启动时会发生什么情况？

如果连接的原动机在连接到 9905-878 型号时未启动，则可能是连接的单元没有电源。要解决此问题，请确保所有连接的断电跳闸型号都有电源，并且接线、电源保险丝和电源都已正确连接。

9905-878 断电跳闸型号 超速保护系统

【英文介绍】

Model 9905-878 is a power trip model and is part of the ProTech 203 overspeed protection system manufactured by Woodward. This model operates at 24 VDC. The storage module on the 9905-878 device is NEMA 4X.

Woodward's ProTech 203 Model 9905-878 is designed for reliable overspeed protection. This model is just one of many ProTech 203 models. Both versions have the same power supply in the A, B, and C units. One of them is Unit 9905-878 and the other is 9905-869, which has a NEMA 4 housing that makes the two different. This two-thirds hardware voting device allows normal operation and provides accurate output provided two of the three speed sensing units are online, which allows for hot replacement and testing of individual units while the prime mover is online and continuing operation if one of the units trips. A single MPU failure does not cause accidental turbine tripping.

Each of the three speed sensing units in the Model 9905-878 has a 24 Vdc power supply (18-32 Vdc, 7.25 W voltage range). Each device generates +5 V and +24 V, isolated from the input voltage. All three units are located in the same chassis. The ProTech 203 lock housing is NEMA 4X certified as long as it uses optional stainless steel wheels.

It's a power-off trip model. It has LED indicators on each unit to alert the operator to device trip, MPU failure, or CPU failure. There is also an alarm output to notify the tripping device.

Units that trip must be reset (or re-energized) before being brought back online, and each unit must be reset before starting the turbine. The 9905-878 overspeed protection system includes convenient remote reset function.

The installation and operation manual for model 9905-878 is Woodward's ProTech 203 Overspeed Protection System Manual 85191 (Version B). In this manual, you will find additional product specifications, installation location requirements, programming instructions, and more.

What happens when the additional prime mover connected to model 9905-878 does not start?

If the connected prime mover does not start when connected to model 9905-878, it is possible that the connected unit has no power supply. To resolve this issue, make sure that all connected power trip models have power and that wiring, power fuses, and power supplies are properly connected.

9905-878 断电跳闸型号 超速保护系统

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