The overhead catenary system is the main facility for power supply in electrified railway.

接触网是电气化铁路的主要供电设备。

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Research conclusions:According to the research results, the DC 1 500 V rigid suspension overhead catenary system is recommended for the first metro line of Haerbin.

研究结论：根据研究的结果，推荐哈尔滨地铁一期工程正线采用DC 1 500 V架空刚性悬挂。

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Research methods:The analysis is made for the present situation of catenary of overhead contact wire system and main measures against wear of it.

研究方法：通过对接触网承力索的现状和主要防磨损措施的研究来进行分析。

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The gap between the pantograph, which is the arm on top of the train car that draws power from overhead lines, and the catenary system must remain within a precise distance and tension.

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