Preventing the inadvertent opening of switch locks at turnouts on main tracks

Vibration caused by rolling stock can unlock the locking of a trailable point machine.

The Finnish Transport Agency should convert the electric point machines of the trailable YV60-300-1:9 turnouts used on the main tracks, in order to prevent vibration caused by rolling stock from unlocking the switch lock.

The electric point machines at the YV60-300-1.9 turnouts used on the main lines and equipped with Railex locking devices allow trailing, although there is no clear necessity for this. Trailing is rare on main tracks. When trailing occurs at a high speed, damage to the point lock is inevitable. The trailing notifications of main track turnouts are most often caused by trackwork machines, most of which do not constitute actual trailing.

Vibration caused by rolling stock can unlock the locking of a trailable point machine.