Electrical Faults Flashcards
(21 cards)
Which level is of high importance?
Level 1
Safety system bypass will illuminate when what are bypassed? (4) TTZD
Traction interlock
Zero speed
Trip
Driver safety device
How many times can you reset a defect?
2
How do you stable for fault rectification?
Get permission
Panto lower
Stable switch for 7 secs
Stabling can be done where?
At a station plat
Protection of home sigs
Not near active level crossing
How often do you have to press the safety system bypass acknowledge button?
Every 30 sec
What MR does the safety loop deenergise?
600kpa
When rescuing a Comeng what switch needs to be bypassed and why?
MR pressure switch because Comeng has a lower MR operating pressure and could cause emy brake on HCMT
What is the traction interlock?
Like a door loop bypass
If you bypass the driver safety device, what are you removing?
Vigilance
Hand and foot
In the the event of a Pulse Width Module failure what button do you press?
Get home mode (it will allow you to apply traction and brakes)
Electrical faults (3)
CBs
Traction
Aux power
What do the electrical systems do if a fault is detected?
Self isolate
Single point failure CBs (BETC)
Brake control supply
Emergency brake loop power supply
Traction control
Cab activation
What is the likely cause if traction and aux power supply systems fail at the same time?
A HSCB has tripped and could be caused by a train fault or overhead fault
If you have a traction and/or aux power fault what button do you press to reset it?
TCU/ACU reset
If you isolate a door, will the internal and external DERs work?
No
How many times will a door try and close?
4 times
DER times
20 seconds until release
120 sec for the inhibit
EAD times
Hold for 10
Inhibit for 5 mins
ASDC procedure
Pa
SDU
Cab door
Cover of button
