EHPM point Machines Flashcards
What is the purpose of the electric hydraulic point machine?
- Enables points to be operated remotely by a signaler
- Enables driver or CE to operate points in case of failure under instructions of the signaler/ TC
Where is the EHPM located?
Next to the track and adjacent to the point blades that it operates
How do we access the controls of the EHPM point machine?
We have to unlock the padlock
What are the different controls of the EHPM?
Power/ manual switch
Red directional, control lever
Pump handle socket with pump handle
(or retractable handle stored nearby)
What are the 3 positions of the red directional control lever & how do you apply the correct position ?
Normal
Centre
Reverse
The lever must be held in position when operating the pump handle
What are the positions of the power/ manual switch?
POWER - for remote operation of points
MANUAL- holds all fixed signals @STOP to allow for manual operation of points
When the power/ manual switch is in the power position, can a directional control lever be moved?
No
What does the pump handle do?
It pumps the points until they are lying and locked in the required position
(N or R)
How is the EHPM operated?
Only when authorised
Open lid by unlocking padlock (instructions underneath)
Move the power/ manual switch to manual
Move the directional control lever to the required position and hold it there
Pull the pump handle from the socket and pump it until the points are fully home and locked
Secure by moving the pump, handle to the vertical position and retracting, or removing the handle
Leave the power manual switch in the manual position
Close the lid and padlock it
Apply a hand locking bar or a point clip
Who removes the hand, locking bar point clips, and restores the power manual switch to the power position?
A signal maintenance technician only
What is the only location where a drive or operate a EHPMs?
Cranbourne sidings
