Train Line Equipment

Close-range inspections
Replacement of train line
equipment
Replacement of automatic
tension balancers
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Working at the forefront of railway operations with thoroughly established maintenance methods

Train line equipment supplies power from the transformers to the trains that run on the tracks. Encompassing equipment such as trolley lines to supply electricity to the pantograph and power poles that hold the trolley lines in place, this equipment is at the forefront of railway operations. Any faults in this equipment could affect surrounding equipment and cause a serious accident. TEMS conducts both ICT-based and visual inspections, along with meticulous close-range inspections, to ensure an uninterrupted supply of power across the wide area covered by our customers' services. We use our extensive knowledge of the sites we work on to create repair plans tailored to the railways we serve, for even safer and more reliable operations.

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Inspections

Close-range inspections

We use a road-rail vehicle to perform meticulous close-range inspections of the trolley lines that supply power directly to the pantograph of trains and the other equipment used for train lines. Our processes combine visual inspections with measurements taken using specialist instruments, enabling us to detect minute changes in the line equipment that cannot be seen in a visual inspection alone.

Repairs

Replacement of train line equipment

We replace worn out equipment, including the pull-offs that hold train lines in place so that the pantograph can receive electricity and the insulators used for the train lines and support equipment such as power poles.

Replacement of automatic tension balancers

Various types of automatic tension balancers are used to maintain a specific tension in the train lines and prevent them from sagging. In recent years, many have been replaced by spring tension balancers (STBs), which are comparatively easy to maintain. We use equipment such as road-rail vehicles and cranes for this work.

Data collection using electric and track inspection cars

TEMS personnel use inspection cars to collect data on the electrical equipment operated by the railways we serve. On conventional lines, data on train line equipment and signal and communication equipment is collected four times a year and twice a year respectively, and inspection cars are driven on Shinkansen lines every few weeks.

East i: electric and track inspection cars for Shinkansen lines

These cars are used for regular inspections of the electrical equipment and tracks used for Shinkansen services. Wear in the trolley lines is measured and the signal equipment is checked to ensure that it is functioning correctly.

East i-E and East i-D: electric and track inspection cars for conventional lines

Electric cars (East i-E) and diesel cars (East i-D) are used for regular inspections of the electrical equipment and tracks used for conventional lines.
These inspections include measurement of field intensity and image data measurements of the view ahead.