中性点非有效接地电力系统

электр. система с неэффективно заземленной нейтралью, non-effectively earthed neutral system

在数据保密学中，对一个计算机系统的安全性的攻击，用以测试安全的有效性及暴露弱点。

In data security, an attack on the security of a computer system, undertaken to test the effectiveness of the security and to highlight any areas of weakness.