Development of Overhead Catenary System for Projected Shinkansen.

Features of Contact Wire Wear and Measures for Local Wear on Simple Catenary with Copper-Steel Contact Wire

“…Oscillating amplitude of entry-side measuring point b2 in the case of the configuration (2) was largest, approximately 70 mm. In the case of the configuration (1), that was also comparatively large, approximately 47 mm. It was attributed to the fact that oscillation of the line B was large, since pantograph shifted from the line A to the line B adjacent to the middle of the span on these configurations.…”

“…Thus, high-speed operation is made possible by raising a wave propagation velocity. Moreover, there are few lines as compared with hitherto known heavy compound catenary system, and since it is simple wire structure, it has the feature of being able to control construction costs 1) . However, several years after installation, local wear of the contact wire were visible on CS simple catenary.…”

Development of Simple Catenary Equipment Using PHC Contact Wire for Shinkansen

“…This type of equipment is used on the Hokuriku Shinkansen line from Takasaki to Nagano [1], the Tohoku Shinkansen line from Morioka to Hachinohe and the Kyushu Shinkansen line from Shin-Yatsushiro to Kagoshima-Chuo. It was confirmed in a Tohoku Shinkansen running test that CS simple catenary equipment demonstrated adequate performance for speeds of up to 300 km/h, which is the maximum speed on commercial Shinkansen lines [2]. However, demand for higher-speed operation on Shinkansen lines leads us to believe that an overhead contact line system for speeds exceeding 300 km/h will be needed.…”

“…Figure 1 shows an outline of PHC simple catenary equipment. A precipitation-hardened copper (PHC) alloy is used as the contact wire, and hard drawn copper wire strands (PH150 mm 2 ) are used as the messenger wire in this equipment. The PHC contact wire consists of chromium-and zirconium-added copper-alloy-based oxygen-free copper.…”

<b>Development of Simple Catenary System for Operation over 300 km/h</b>

“…Since 1964 when Tokaido Shinkansen line started operation, compound catenary systems have been mainly used in overhead contact line structures on high-speed lines in Japan. Simple catenary systems for Shinkansen highspeed lines however, were first installed on the Hokuriku Shinkansen line which entered into operation in 1994 [1]. This simple catenary system was designed for lines with low traffic density in contrast with lines where heavy compound catenary systems were installed.…”