起重机械保护接地与检验检测

根据IEC相关标准要求和起重机械电气设备的用电特点，对起重机械保护接地概念和措施进行梳理，对有关规范的要求进行探讨。强调起重机本体应设置独立保护导线，尽可能装设剩余电流动作保护器，保护接地电路应始终保持连通，尽量实施等电位联结。提出保证起重机械接地故障防护本质安全的系统检验要求，并对检验项目进行法定检验的分工和划分。

According to the relevant standards of IEC and the power consumption characteristic of electric equipments of crane,we studied the concept and measures of protective earth of crane and carried on the discussion of the relevant specification. Stressed that the main body of crane should establish the independent protective wire,install the RCD protector as possible,the protective bonding circuit should maintain the connection throughout and keep equipotential bonding. Proposed the systematic inspection of essence security of earth fault protection ,and finished the division of legal inspection.