Many railway tracks have been electrified, thus eliminating exhaust emissions. However, railways still emit particles due to abrasion and wear. The main such particle sources are brakes, wheel-rail contact, and pantographs and contact wire. However, information on the quantities of such particles is rare. Estimations in published data are quite heterogeneous, with PM10 emission levels varying by a factor of ten. In an attempt to improve the database and to reduce uncertainties, a series of test bench tests was conducted on pantograph-catenary contact. In order to study the impact of specific parameters, i.e. of train speed, contact force and current intensity, on the emitted particle mass and size distribution, parameter levels were varied across the tests. A chemical analysis of emitted particles provided information on the respective contributions of contact strip and contact wire. PM10 emission factors were found to lie in the range of 0.14–0.62 g/km.

许多铁路轨道已实现电气化，从而消除了废气排放。然而，由于磨损和磨损，铁路仍然会排放颗粒物。此类颗粒源主要是制动器、轮轨接触、受电弓和接触线。然而，关于此类粒子数量的信息很少。已公布数据中的估计值非常不同，PM10 排放水平相差十倍。为了改进数据库并减少不确定性，对受电弓-接触网进行了一系列试验台试验。为了研究特定参数（即列车速度、接触力和电流强度）对发射粒子质量和尺寸分布的影响，参数水平在测试中有所不同。对发射粒子的化学分析提供了有关接触带和接触线各自贡献的信息。发现 PM10 排放因子在 0.14–0.62 g/km 的范围内。