Is the device configured for two wire or four wire systems?

设备是配置为二线制或四线制的系统吗？

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In the Three phase and Four wire circuit system, the neutral wire is very important.

在三相四线制供电系统中，中性线是非常重要的。

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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。

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