9905-877 通电跳闸型号 可锁定外壳和跳闸警报

【产品详情】

伍德沃德 ProTech 9905-877 的通电跳闸型号 203 超速保护。220V 交流输入、可锁定外壳和跳闸警报

该超速保护装置 通过使用三个磁性拾音器（MPU）与三个单独的速度传感单元接口，每个单元执行自己的速度计算，从而持续监控超速情况。当在三分之二的投票后检测到超速情况时，跳闸继电器被激活。9905-877 型是一种通电跳闸系统。

该型号的功能包括远程复位、报警输出、内置自检和锁定外壳。

9905-877 型的锁定外壳确保不会对系统编程进行未经授权的更改，也不会执行未经授权的测试，因为在 MONITOR 和 PROGRAM 模式之间切换需要密钥访问。9905-877 外壳符合 NEMA 4 / IP 65 标准。

速度感应单元可以一次测试或更换一个，同时原动机保持在线。9905-877 系统的设计方式是，仅使用三个单元中的两个即可保持准确的输出。如果其中一个设备跳闸，则需要重置或重新通电，然后才能重新联机。

可能导致跳闸的一些因素是 MPU 故障或信号丢失、联锁故障、超速测试，或者在涡轮机重新启动之前机组根本没有重置。如果设备跳闸，跳闸将由报警输出和该设备操作员界面上的 LED 指示。

有关安装、故障排除和其他 9905-877 规范的信息，请参见 Woodward 的手册 85191（版本 B）。

9905-877 通电跳闸型号 可锁定外壳和跳闸警报

【英文介绍】

Woodward ProTech 9905-877 power-on trip type 203 overspeed protection. 220V AC input, lockable housing and trip alarm

The overspeed protection device continuously monitors overspeeds by using three magnetic pickups (MPUs) that interface with three separate speed sensing units, each of which performs its own speed calculations. When overspeed was detected after two-thirds of the vote, the trip relay was activated. Type 9905-877 is an electric-powered trip system.

Features of this model include remote reset, alarm output, built-in self-test, and locking housing.

The locked housing of Model 9905-877 ensures that no unauthorized changes are made to system programming and no unauthorized tests are performed, as key access is required to switch between MONITOR and PROGRAM modes. The 9905-877 housing is NEMA 4 / IP 65 compliant.

The speed sensing unit can be tested or replaced one at a time while the prime mover stays online. The 9905-877 system is designed in such a way that accurate output can be maintained using only two of the three units. If one of the devices trips, it needs to be reset or powered back on before it can be brought back online.

Some of the factors that can cause tripping are MPU failure or signal loss, interlock failure, overspeed testing, or the unit not being reset at all before the turbine is restarted. If the device trips, the trip will be indicated by the alarm output and the LED on the operator interface of the device.

For information on installation, troubleshooting, and other 9905-877 specifications, see Woodward's manual 85191 (version B).

9905-877 通电跳闸型号 可锁定外壳和跳闸警报

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