HCMT Underframe Flashcards
On what cars is the main reservoir and what side
Every car
‘B’ side
What does the surge reservoir do and what end located
Supply compressed air to air bag suspension at each bogie
What does the brake supply reservoir do
Supply compressed air to the EP valves to charge brake cylinder
Where is the tread scrubber located
TC car only
Where is the park brake manual release located
DMp, Mp and DT cars
What is primary suspension on the bogie
Rubber laminated springs
Where is the air suspension isolating cocks located
‘B’ side no 2 end
How is the sand distributed onto the rail head
Pneumatic pressure
Where are the sanders located on the Tc and DMp cars
Nr 2 end only
Where are the sanders located on the Mp and DT cars
Both ends
Does the coupler have an electrical component
No
How do you open the coupler cover
Unlock the locking mechanism
With assistance, raise cover
Use second locking mechanism to lock in position
Can you lift the coupler cover by yourself
No
Name the 5 isolating cocks under the coupler cover
Uncouple device isolating cock
Towing unit isolating cock
Brake pipe end cock
Main reservoir end cock
Horn isolating cock
Name the 5 cocks in the brake control module TC car
Brake supply
Brake cylinder bogie 2
Brake cylinder bogie 1
Tread scrubber
Sander
Where is the BCU located and what does it do
On every car
Controls application and release of the EP friction brakes
Where is the main res isolating cock and what cars?
Every car at the end of each car
What are some of the features of the bogie?
• Speed Sensors
• Tread Scrubber (Tc Car only)
• One Park Brake per axle (DMp, Mp and DT cars)
• Park Brake Manual Releases (DMp, Mp and DT cars)
• Primary and Secondary Suspension.
Where are the emergency ladder access located?
Centre doors on all trailers
Where is the auxiliary power supply container located?
Tc and DT cars
What does the auxiliary power supply container have in it? ( 3 answers)
• Auxiliary Inverter
• Medium voltage box
• Battery charger
What does the auxiliary power supply system convert 1500v DC to and where does it go?
415V 3 phase AC to the train and supply power to the battery charger
What voltage does the battery charger supply to the train?
110v DC
How long will batteries provide emergency power for?
Min of 2 hours
What does the Air supply unit contain?
(3 answers)
Main air compressor
Air dryers
Filters
Where is the Trip cock isolating cock located?
B side between doors number 2 and 4 on the TC car
What are the 5 cocks in the brake control module of a DMp, DT and Mp car?
• Brake Supply
• Brake cylinder bogie 2
• Brake cylinder bogie 1
• Park brake
• Sanders
What does the high voltage box consist of? (2 answers)
• HSCB
• Harmonic wave detection device
What does the variable voltage and variable frequency cabinet contain?
(2 answers)
• Two traction inverter modules( one per bogie)
• Traction control unit
Will the Panto isolating cock on the DMp car isolate the Panto?
No, because the auxiliary res maintain Panto in raised position
When will the auxiliary res automatically raise the Panto?
• When there is insufficient MR pressure on the car to raise the local pantograph (i.e., train start up)
• When the car has been isolated from the MR system.
Will the Panto isolating cock on a Mp car isolate the Panto?
Yes because there is no auxiliary compressor
Where is the medium voltage box located?
number 1 end B side of Mp car
What is the function of the medium voltage box?
Maintain train lined 415vAc that is produced by the auxiliary inverters
