Electrical Faults Flashcards
How long do you do a hard stable for a fault rectification?
7 seconds
What level of alert requires immediate attention?
Level 1
When does the Safety System Bypass fault light illuminate?
When the following has been bypassed:
Traction interlock (door bypass)
Zero speed (Tacho)
Trip
Driver safety device (PV)
How might you rectify many faults on a HCMT?
Reset applicable reset button
Trip and reset CB
Stable
How many times can you reset a defect?
2 times
When stabling for fault rectifications what do you do?
Panto lower
Turn stable/start up switch to stable for 7 seconds
If performing stable on mainline what do you have to do?
Contact TC
Platform
Under protection of home signals
Not near LVLX
If you have turned a safety bypass switch what do you have to do?
Secondary circuit
Press safety System Bypass Acknowledge button every 30 seconds
What MR pressure drop does the safety loop open?
600kPa
What is the MR Pressure switch for
Turn to Bypass when coupled to a Comeng for rescue
What is the Traction Interlock Bypass switch for?
Door Loop Bypass
Turn if you can’t get traction because of FDCL, no door close light, door faults
What is the Driver Safety Device bypass switch?
Hand and Foot PV
What are faults within the electrical system generally related to?
CBS
Traction
Auxiliary Power
- not MR (exam)
How are most electrical faults dealt with?
Most electrical systems will self-isolate
Which CBs if tripped will cause the train to be declared disabled?
Brake Control Supply
Emergency Brake Loop Power Supply
Traction Control
Cab Activation
