RBK3型扳键开关组适用于铁路电力机车、电动车组等工业自动化控制设备，用于机车电路及辅助电路。

具有操作灵活、高可靠、长寿命的特点,并且可提供多种闭合表供用户选择。对关键操作位加机械锁定，防止误动作。并可通过更换不同的触头来适应不同的负载情况。

RBK3 of key-lifting switch group is applicable to railway electric locomotives, motor train unit, and other industrial automation control device, and is used in locomotive circuit and auxiliary circuit.

With the features of flexible operation, high reliability, long service life, and can provide various close-open table for users. It adds mechanical lock on the key operation, so as to prevent false action. Through changing different contacts, it can adapt to different load conditions.