Underframe Flashcards
What does the MR do?
Stores comp air for pneumatic equipment
Where is the MR located?
B side of every car
Where are the MR isolating cocks?
End of each car
What do the surge res do?
Supplies comp air to the air bag suspensions at each bogie
What do the brake supply reservoirs do?
Supply comp air to the EP valves to charge the BC
Where is the primary suspension?
Between the bogie frame and the axle box
Where is the secondary suspension?
Between the bogie frame and car body
What is the secondary suspension?
Air bags
What do the air suspension isolating cocks isolate?
Isolates the surge res for its bogie
What are the isolating cocks under the coupler cover? (5)
Uncouple device iso cock
Towing unit iso cock
BP end cock
MR end cock
Horn isolating cock
What is inside the brake control module of a Tc car? (5)
Brake supply iso cock
BC bogie 2 iso cock
BC bogie 1 iso cock
Tread scrubber iso cock
Sanders iso cock
Where is the BCU?
Inside the BCM of every car
What does the BCU do?
It’s a computer that controls the application and release of EP friction braking
What is the primary suspension?
Rubber laminated springs
What does the towing unit do?
Provides the means for HCMT brake control to interface with traditional brake pipe connections
What does the aux power supply container have in it? (3) (BAM)
- aux inverter
- medium voltage box
- battery charger
What is the purpose of the aux power supply system? (2)
- Converts 1500v DC to 415v AC
- powers the battery charger
Where does 110v DC come from?
The battery charger
How long do the batteries last for?
Min 2 hours
What does the air supply unit (ASU) comprise of? (4)
- main air comp
- air dryers
- filters
- backup comp governor
What does the shore equipment do?
Charge the batteries
When does the trip lower?
When the master controller key switch is turned to on
What’s inside the BCM of a DMp, Mp and DT car?
Brake supply iso
BC bogie 2 iso
BC bogie 1 iso
Park brake iso
Sanders iso
What does the high voltage box do?
supplies power to the traction and aux power supply systems
What’s in the HV box?
HSCB and harmonic wave detection device HWDD
Variable voltage and variable frequency comprises of…? (2)
Two traction inverter
TCU
What does the VVVF do?
1500 v dc to 3 phase variable voltage and variable frequency for powering the traction motors
Where is the auxiliary compressor?
On DMp cars only
What is the purpose of the aux compressor?
Air for the Panto when MR is low
When will the aux compressor automatically raise the pantos? (2)
Not enough MR pressure
When car has been isolated from MR
Where are the aux power supply containers?
Tc and DT cars
