Versatrax 300™
Document: UMBH008532.docm
Revision: A07
Created by: KJB
Date: 26 Sep 2019
3047763-A07
Source Location: C:\ePDM\ISLEng\products\bh-vt300series4-trackchassis\manuals\UMBH008532.docm
Page 48 of 67
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Ground Fault Detection
The Interface Box contains ground fault detection for the 420VDC vehicle power supply. Should internal
wiring or the tether itself become damaged in such a way to provides electrical connection between the
420VDC feed / return lines and earth ground the fault detector will trip and cause the power supplies to
shut down.
This detector monitors the high voltage DC power feed only and is not a replacement for a proper GFCI
protected AC power outlet.
A detected ground fault may be the result of damage anywhere in the system, but the most likely source
is a cut or crushed tether.
Other possible causes may include water intrusion into the vehicle’s Telemetry
or Termination canisters, damaged deck cables, or water within the drum of the tether reel.
Warning:
If a ground fault alarm trips during operation the system should be turned off and
carefully examined. The alarm could be an indication of a safety risk.
Power Up / Power Down
The VT300
™ system is powered in four independent blocks:
Control Computer
–
This is an industrial PC running Windows 7. Boot as normal for a Windows
computer.
The user account is “Operator Admin”. There is no password.
Warning:
Always shut the computer down by pressing the Windows START button and
selecting “Shut Down”
If you disconnect the power without a proper shut-down sequence you risk corrupting the hard drive and
losing data.
Fiber Interface Box
–
This contains the fiber transceiver equipment. This interface box must be turned
on in order to communicate with the vehicle and receive video from the vehicle.
Winch
–
The winch is normally ON whenever plugged in. Winch power can be cut by pressing the
Emergency STOP button on the side of the frame. Power can be restored by resetting the STOP button
with a twist. The motor controller has a power interlock to prevent unintended movement when power is
turned on or restored. The level wind cannot run unless the winch power is ON. Refer to the winch
manual for controller details.
Vehicle
–
The 420VDC vehicle power is controlled from the Interface Box mounted below the high-
voltage power supplies. Press the green
ON
button to power up the vehicle and the red
STOP
button to
power down. Power is relay latched and in the event of a power failure the unit will remain
OFF
when the
mains power is restored.
