Made in: Japan
Manufacturer: SANWA TEKKI
Model : Pull-off Arms
These pull-off arms are specifically crafted for the heavy compound catenary equipment used on the Shinkansen.
These come in various models, like HC-1 for open-section pole support and HC-2 for tunnel and station building applications.
Main specifications of the product shown in the photograph
| Model | HC-1A-E main arm | HC-1A-E auxiliary arm |
|---|---|---|
| Tensile withstand load | 4.12 kN (420 kgf) (for 3 minutes) | 4.12 kN (420 kgf) (for 3 minutes) |
| Slipping sideway withstand load | 1.47 kN (150 kgf) (for 3 minutes) | – |
In this model, pull-off arms are used with CS catenary equipment, including CS-1 for open-section poles and CS-2 for tunnels and station buildings.
Main specifications of the product shown in the photograph
| Model | CS-1A-E main arm |
|---|---|
| Tensile withstand load | 3.14 kN (320 kgf) (for 3 minutes) |
| Slipping sideway withstand load | 1.47 kN (150 kgf) (for 3 minutes) |
These model’s pull-off arms are the preferred choice for narrow-gauge railway lines.
Their bow-shaped pipes prevent any adverse effects on pantographs during curve canting, pantograph inclination, or other train rolling events.
Main specifications of the product shown in the photograph
| Model | BL (for general purposes, bow-type) |
|---|---|
| Tensile withstand load | 2.94 kN (300 kgf) (for 3 minutes) |
| Slipping sideway withstand load | 0.98 kN (100 kgf) (for 3 minutes) |
These model’s pull-off arms maintain insulation for the rear end lines of 1500 VDC DC overhead contact lines in locations like station buildings and narrow-gauge line overbridges.
Main specifications of the product shown in the photograph
| Model | BL (for insulation, bow-type) |
|---|---|
| Tensile withstand load | 2.94 kN (300 kgf) (for 3 minutes) |
| Slipping sideway withstand load | 0.98 kN (100 kgf) (for 3 minutes) |
| Withstand voltage | AC 10 kV (for 10 minutes, in a dry condition) |
Cyclic currents caused by the potential difference between contact wires and messenger wires can melt bolts supporting the rear ends of pull-off arms.
Pull-off arms of this model prevent the flow of cyclic current with the aid of an insulating material.
Compare with pull-off arms for insulation, it is designed to be low in dielectric strength.
Main specifications of the product shown in the photograph
| Model | BL (for cyclic current prevention, bow-type) |
|---|---|
| Tensile withstand load | 2.94 kN (300 kgf) (for 3 minutes) |
| Slipping sideway withstand load | 0.98 kN (100 kgf) (for 3 minutes) |
| Withstand voltage | AC 3 kV (for 10 minutes) |
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