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油库的接地与接零系统是非常重要的。为了保证油库配电系统保护设备可靠地动作,使人体避免触电,保障油库作业的安全,一般在中性点直接接地的380/220V三相四线制系统中,必须采用接零保护。把所有的设备的外壳直接与电气系统中的零线相连。当发生碰壳短路时,短路电流经零线成闭合回路,使电气设备的碰壳变成单相短路,这样就保证了保护设备能迅速动作,断开故障设备。就此问题浅谈如下。
Tank grounding and then zero system is very important. In order to ensure the reliable operation of the oil depot distribution system protection equipment and prevent the human body from being electrocuted and ensuring the safety of oil depot operations, it is necessary to adopt zero-connection protection in the 380 / 220V three-phase four-wire system where the neutral point is directly grounded. Connect all equipment housings directly to the neutral in the electrical system. When the touch-off occurs when the short circuit, the short-circuit current through the zero line into a closed loop, the electrical equipment touch the shell into a single-phase short circuit, thus ensuring the protection of equipment can move quickly, disconnect the faulty equipment. On this issue as follows.