Reg Points Crank Handle - Locking in Control Table

[khalid]

Thanks for this.
Could you confirm whether the electrically released key has to be inserted into the point machine in order
a) to be able also to insert the winding handle
or
b) for the winding handle to be effective in moving the mechanism.
As I understand what you wrote, the winding handle itself is kept in a locked cupboard but it is only procedural arrangements which prevent someone having an appropriate key taking it out

The key enables a combination of the two as at first the key is inserted by swinging aside a flap on the outside of the machine.Turning the key will operate a switch to disconnect the negative of the machine supply as also activate a mechanical wedge which will open the hole for the inserting the handle.
Disconnecting the negative ensures that the machine can no longer be operated from external supply.

Khalid.