Automatic Vigilance Control System
VCD is meant for checking and keeping the driver alert. It is a safety device. A foot switch of VCD is provided below driver’s desk in each cab, also press button ‘BPVG’ is provided on drivers’ desk on Asst. side.
Driver/Asst. driver is expected to activate VCD within every 60 seconds interval by one of the following way.
1. Press VCD “ Foot switch” OR
2. Press BPVG (Green) OR
3. Operate throttle in TE/BE in different of more than 3% OR
4. Operate ‘Sanders’. If one of the above exercises is done, the driver is considered alert and the 60 seconds cycle get reset.
If none of the above activities are done once within 60 seconds, then buzzer will sound and ‘LSVW’ will glow for next 8 seconds. Within these 8 second acknowledge the VCD by pressing ‘vigilance footswitch’ or ‘BPVG’, if not acknowledged, VCD will apply penalty with emergency braking (2.5 – 3.0 kg/cm2 ).TE/BE will become ‘0’ & BP pressure will drop 2.5 to 3.0 kg/cm2 .
Note:-For VCD, the speed of train should be more than 1.5 KMPH.
Dead Mans Mode: If VCD ‘Foot switch’ lies remain pressed for more than 60 second, then the system will go automatically in “Dead Mans” mode, & buzzer will sound, if not released with next 8 second, VCD penalty will be applied with emergency braking. The BP will drop 2.5 to 3.0 kg/cm2 . Resetting Of VCD Penalty Brakes: 1. Bring throttle to ‘0’ 2. Wait for 160 seconds in WAG-9/WAP-7 and 120 seconds in WAP-5 without switching ON/OFF of the electronics
3. Press “BPVR” to reset VCD, LSVW will extinguished and buzzer will stop.
4. Press and release VCD “Foot switch”.
5. Press ‘BPFA’ for acknowledging fault message.
6. MR/BP pressure would come back to normal
7. Resume ‘Normal” traction.
Isolation Of VCD :
If driver is acknowledging VCD correctly as per procedure, but till VCD penalty is applying, in that case it is assumed that VCD is malfunctioning. In such cases stop the train, take safety measures. VCD can be bypassed by keeping switch no. 237.1 (SB-1) on ‘0’ position. Remark should be given in log book, TLC is to be informed and proceed carefully
