over-voltage relay的用法和样例：
例句
- And also, it has many other functions include islanding detection and avoiding, over voltage protection, over current protection and so on.
此逆变器还具有其他功能，包括孤岛效应，过电压欠电压保护，过流保护等等。 - Capacitor bus voltage is distorted due to harmonics, so both the r.m.s and crest values of the waveform should be measured in the over-voltage protection.
电容器母线电压因含有谐波而发生畸变，因此在过电压保护时要分别计算实际的电压有效值和峰值。
