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Protection Switch Product Introduction
To ensure absolute train safety, certain station segments necessitate the installation of protective switches. These switches engage under specific conditions to jointly enhance safety measures. The arrangement of switches not meant for direct placement requires manual or belt manipulation, along with locking mechanisms. This ensures the turnout's position is verified and secured in the designated protection location, allowing complete approach locking and signal activation. By checking the turnout position (confirming accuracy) and locking it within the specified protective stance, a seamless approach locking and signaling process is achieved. Depending on its application and varying protection needs, protective turnouts are categorized as follows:
On a 6‰ downhill entry (or slightly less, where train braking proves challenging upon entry), the foremost turnout group is designed for enhanced protection. These safety turnouts can redirect to a safety line, special track, or refuge track, providing a secure redirection.
At the terminal continuation of a 6‰ descent ramp, protective turnouts exist to prevent trains with insufficient braking from overrunning outbound signals or navigating into alternate routes. These protective turnouts are adaptable, positioning towards safety lines, dedicated tracks, refuge lines, and more, ensuring safe redirection. This switch is managed electronically.
For a 6‰ downhill ramp's terminal continuation, a leveling protection switch may be installed. Although manually operated, its position is still monitored, particularly for incoming trains. This switch is generally positioned to match continuation road displays, ensuring only designated paths are lit for clarity and safety.
Dedicated lines and bustling shunting operations often involve protection turnouts to prevent accidental transfers onto main station lines. These protective switches are usually directed towards dedicated safety tracks or shunting pull-out lines, ensuring safe and efficient train movements.
Double-acting turnout pairs across cross-ferry lines serve as mutual inspection protection systems. When one is reversed, the other must be secured in its position to prevent 'cross' collisions. This setup allows buffered sidestroke movements, minimizing impact and wear on cross-ferry lines.
| Number | Model | Gauge(mm) | Frog No. | Curve | Radius(m) | Total Weight(kg) |
| 1 | DK612-2-3 | 600 |
No.2 | 3 | 400 | 311 |
| 2 | DK612-3-6 | No.3 | 6 | 6100 | 515 | |
| 3 | DK612-4-12 | No.3 | 12 | 6800 | 573 | |
| 4 | DK612-5-15 | No.5 | 15 | 7400 | ||
| 5 | DK615B-2-3 | No.2 | 3 | 4000 | ||
| 6 | DK615B-3-6 | No.3 | 6 | 6100 | ||
| 7 | DK615B-4-12 | No.4 | 12 | 6800 | ||
| 8 | DK615B-5-15 | No.5 | 15 | 7400 |
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