继电保护的正确可靠动作，关系到电力系统的安全稳定运行。

The correct and reliable action of protection relay relates to security and stability of power system.

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然而电流互感器(CT)饱和会影响输电线路电流差动保护的可靠动作。

However, current transformer (ct) saturation is still affecting the reliability of transmission line differential protection.

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液压转辙的可靠动作对提高铁路运输效率和保证行车安全起着至关重要的作用。

The movement of the rail switch is driven by hydraulic switch machine, it has great effect on the railway transport efficiency and traffic safety.

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