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天津电信三区局河北路分局日前顺利完成了相控电源设备的改造。该分局于１９８６年安装ＮＥＣＮＥＡＸ６１Ｅ程控交换机５万线 ,其配套的电源设备为日本新电元相控４８Ｖ／４００Ａ×７的设备 ,总容量为２８００Ａ ,负载电流为１５５０Ａ。该设备目前已运行了近１５年 ,因故障?
Hebei Branch of the Third District of Tianjin Telecom recently successfully completed the phase-controlled power supply equipment transformation. The branch in 1986 to install NECNEAX61E program-controlled switches 50000 lines, the matching power supply equipment for Japan’s new electrical phase-controlled 48V / 400A × 7 equipment, a total capacity of 2800A, the load current of 1550A. The device has been running for nearly 15 years, due to failure?