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附录四
英文文献及译文
Analysis of the reasons for the low power factor of the factory power supply system, and to improve power factor and to take effective idle work compensation measure is discussed. To saved the electrical energy, raised enterpriseps economic efficiency has important effect 。
Large and medium - sized enterprises PeiDianJian with responsibility for the whole enterprise management and distribution of electricity. At present, most of the enterprise management mode PeiDianJian obsolete, low automatization, difficult to adapt to the requirements of the development of enterprises. In view of this situation, we have developed PeiDianJian monitoring and management system. This system in the computer as the core, real - time monitoring of electric parameters, PeiDianJian all the data processing, dynamic display of statements and output. This system can be used in the PeiDianJian enterprise technical renewal and the transformation of enterprise to do well planned, save electricity, improve economic benefit has important significance.
We use the mains by huge power supply system is provided, all the network supply circuit is only for each of the power supply system, network, a tiny branches output. Metal wires connected by good conductors of power supply circuit, each of its source power substation, and then from that power to client to substation and its level in scale, thousands of kilometers and hundreds of kilometers of kilometers. Bare wire in the air in the vertical distribution of atmospheric mountain while high and low, in accordance with the Qing, from dozens of rice to thousands of meters and hundreds of meters above all common. 2 km In such a large scope, the vertical distribution and wide for substation online, due to weather, no matter where or by direct discharge, clouds cloud in discharging, in the air and good conductors of bare wire easily inductive or direct lightning introduction to. This is the power system and power equipment to be struck by lightning external environment.
Power supply system and electric defense methods of lightning
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