本文就地面供电电压等级由380v提高到660v电压技术问题进行探讨。
The paper discusses the technique of increasing surface power voltage class from 380v to 660v.
提高配电网电压等级是提升城市电网供电能力的有效途径。
To lift the voltage level of distribution network is an effective method to enlarge the power supply capacity of the urban network.
城市配电网因为其电压等级较低，为了提高系统供电的可靠性，曾广泛采用中性点不接地系统方式。
In distributions, because of its low-level voltage, its neutral point used to disconnect to the ground in order to improve its reliability.
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