TM-5-5420-279-10
Section III ELECTRICAL SYSTEM
2.4 ELECTRICAL SYSTEM
General
2.4.1.1
The electrical supply is provided from the launch vehicle and regulated to 24Vdc by a
voltage regulator installed in the electrical control cabinet.
2.4.1.2
The system is fail safe with controls spring-loaded to the `OFF' position.
Emergency Stop System
2.4.2.1
Emergency stop buttons are fitted at strategic locations where crewmembers are
working, their operation will stop all operating functions and disconnect the power
take off (PTO) in the event of an emergency.
2.4.2.2
Eight emergency stop buttons are provided. They are located at:
1 - Crane
2 - Launch Frame
1 - Tail lift
1 - Launch Chest Pack
1 - Operator Panel
2 - A-Frame Legs.
2.4.2.3
Pressing any of the emergency stop buttons will cause operation to cease and the
PTO to disengage. The operator panel of the interface cabinet will identify which
button has been activated. The reason for emergency shut down should be
ascertained and that it is safe to proceed before resetting the emergency stop system.
The activated button must be reset by pulling out the button (or twisting) and then
pressing the `Emergency Stop Reset' button on the operator panel.
WARNING
INJURY TO PERSONNEL. WHEN OPERATED THE EMERGENCY STOP OVERRIDE
SWITCH DISABLES THE EMERGENCY STOP SYSTEM. GREAT CARE MUST BE
EXERCISED WHILE BUILDING BRIDGES WITH THE EMERGENCY STOP OVERRIDE
SWITCH OPERATED, AS THERE IS NO WAY TO REMOVE HYDRAULIC POWER QUICKLY
IN AN EMERGENCY.
2.4.2.4
Fitted in the vehicle cab is the emergency stop override switch, which overrides the
emergency stop system in the event of a cable loom being damaged. The emergency
stop override will deactivate in the event of the four position selector switch, in the
vehicle cab, being moved between positions causing hydraulic power to be removed
from the launcher. The switch will have to be reset for operations to be continued.
