grounded phase wire 接地相线
three phase four wire system 三相四线制
phase-wire 相线
three phase three wire system 三相三线制
two phase three wire system 双相三线制 ; 二相三线制 ; 两相三线制
Three-phase four-wire 三相四线 ; 三相四线制
Effective shielding can be achieved by reducing the breakdown probability of the gap between shielding wire and phase conductor.
提高避雷线保护的有效性可以通过减小避雷线—相导线间隙击穿概率来达到。
The equipment should be placed on the ground without violent vibration or on the working stage and connected in the power grid of 380v with three phase and four wire.
设备应放置在无剧烈振动的地面或工作台上，接入三相四线380v的电网。
Especially three-phase four-wire active power filter hardware has simple structure with only three group switch device.
特别是三相四线制有源电力滤波器硬件结构简单，只有三组开关器件。
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