Verify ac line voltage phase and frequency with the controller data plate on the enclosure door prior to connecting ac power.

在连接交流电源之前，请验证交流电压、相位和频率是否与控制装置外壳门参数板上的相应数据相同。

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A unified power flow controller (UPFC) regulates the amount of active power and reactive power along the transmission line as well as the level of voltage of shunt busbar where the UPFC is installed.

统一潮流控制器(UPFC)的主要控制功能是潮流控制和电压控制，控制的水平由控制器的设定参考值决定。

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Local controllers (X-NET) gather this information and deliver to a web-controller via GPRS. The overhead sensors are line powered, and the X-NET Controller can be powered by a low voltage supply or a solar panel.

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