安全滑觸線安裝指示燈的必要性：
The necessity of safety sliding contact line installation lamp:
安全滑觸線安裝指示燈是*的，滑觸線指示燈可以起到指示、警示、電流顯示等作用。
Safety sliding contact line installation lamp is indispensable, sliding contact line indicator light can act as instructions, warning, current display, and so on.
通過指示燈的指示可以很明確的看出滑觸線是否通電正常。
Through the indicator light indicates whether can see clear sliding contact line power is normal.
其次，常規上來說，滑觸線指示燈是用來顯示滑觸線通電情況，不過它還有夜間指示、照明等相關作用，安裝滑觸線指示燈可以提高檢修人員、車間起重操作人員的工作效率、同時減小了車間安全隱患。
 

Second, regular, sliding contact line indicator is used to display the sliding contact line current situation, but it also has the night, lighting instructions and other relevant role, install the sliding contact line light can improve the working efficiency of the maintenance staff, workshop crane operators, at the same time reduces the workshop safety hidden trouble.