交流电气装置的接地DL/T621—1997GroundingforACelectricalinstallations中华人民共和国电力工业部1997-09-02批准1998-01-01实施1范围..........................................................................................................................................................................22名词术语................................................................................................................................................................23A类电气装置接地的一般规定.............................................................................................................................34A类电气装置保护接地的范围.............................................................................................................................45A类电气装置的接地电阻.....................................................................................................................................55.1发电厂、变电所电气装置的接地电阻......................................................................................................55.2架空线路的接地电阻...............................................................................................................................65.3配电电气装置的接地电阻.......................................................................................................................66A类电气装置的接地装置.....................................................................................................................................76.1接地装置的一般规定...............................................................................................................................76.2发电厂、变电所电气装置的接地装置...................................................................................................86.3架空线路杆塔的接地装置.....................................................................................................................106.4配电电气装置的接地装置.....................................................................................................................127低压系统接地型式和B类电气装置的接地电阻..............................................................................................127.1系统接地型式.........................................................................................................................................127.2接地装置的接地电阻和总等电位连接.................................................................................................148B类电气装置的接地装置和保护线...................................................................................................................168.1一般要求.................................................................................................................................................168.2对地连接.................................................................................................................................................168.3保护线.....................................................................................................................................................178.4接地装置.................................................................................................................................................188.5等电位联结接线.........................
