DCPMs Flashcards
What are the two levers that the DCPM machine has?
Selector Lever (smaller lever)
Hand Throw Lever
What are the positions of the selector lever?
MOTOR (remote control of points)
HAND (manual control)
How do you operate a DCPM??
- Unlock the padlock
- Depress the foot pedal to release the latch
- Lift over selector, lever and depressed foot pedal to unlatch on the left-hand side
How can you tell which position the lever is in?
The word HAND appears when it’s in the hand position
the word MOTOR appears when it’s in the motor position (normal position)
What is the purpose of the hand selector lever and how do you operate it once HAND is selected?
It is the longer lever and is used in the event of a failure to operate the points into the desired position
What are the positions of the hand throw lever?
Normal. (N) = mainline
Reverse (R) = diverging line
How do we know which position the hand throw lever is on whether it’s in Normal or Reverse?
The relevant position word appears on the top of the lever
How do we secure the manually operated lever in the required position?
With a paddlock
OPERATIONAL DIAGRAM
If the points need to be operated due to instructions from TC / signaller
How must they be operated to ensure they are in the required position??
If required and already in following correct position:
in Reverse R-N-R
If in Normal N-R-N
If required and not In correct position:
To change to reverse: N-R-N-R
To change to Normal- R-N-R-N
Once the train has cleared the points (after the DCPM has been operated and secured)
is the driver required to return the hand reliever to the normal position and selector lever to the motor position and secure both levers with the padlock?
Yes
What two items can competent workers/ drivers use or apply to secure the points?
Points Clips
Hand locking bars
When Would point clips and hand locking bars be used?
Point clips-When facing movements are required over the points and detection of the points is not visible
HLBs - to Secure the blades from moving in case of no detection failure, and the system resets
Where at hand locking bars located
At the center of the track on a sleeper or adjacent to the point machine
How must a Hand Locking Bar be operated?
(Usually when signal at stop)
MUST
- Be instructed to do so
- The points are to be lying correctly
- RTA form required
- Unlock the hand locking bar with a 5P Key
- Lift the bar against the point blade to hold it in position
- Padlock the locking bar in position
Receive appropriate authority to pass signal at STOP
