The over-load protection technology is an indispensable constituent of the low-voltageapparatus intellectualization, ensuring the electric motor and the distribution line safe operation.
过载保护技术是低压电器智能化技术的重要组成部分，是保证电动机、配电线路安全运行的重要技术。
2
The working principle of shield, slush transportation system, slush disposal system and the low-voltageapparatus equipment in the simultaneous slush pouring system were emphatically explained.
重点说明了盾构本体、泥水输送系统、泥水处理系统和同步注浆系统中低压电器的工作原理。
3
The paper introduces the three dimensions computer aided design system, including its ability and feature, hardware and software, and its application in the lowvoltageapparatus.