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自动切断电源是起重机间接接触防护中最常用的措施,采用自动切断电源这种防护措施需协调三方面的要求:电源接地系统型式、不同地基的保护联结系统的接地阻抗值和检测绝缘故障保护器件的特性。正确判别起重机电源接地型式是对起重机接地检验首要的任务,本文对判别各种接地型式的方法进行了详细的介绍,并指出了起重机接地的常见误区以及正确的处理措施。
Automatically cut off the power supply is the most common indirect crane crane contact protection measures, the use of automatic cut off the power supply This protective measures need to coordinate the three requirements: the power supply grounding system type, ground connection of different ground resistance value and detection of insulation fault protection devices Features. Correctly judging the grounding type of crane power supply is the most important task for crane grounding test. This paper introduces the method of distinguishing various grounding types in detail and points out the common mistakes and proper handling measures of crane grounding.