A bridging device is an embedded electronic mechanism designed to be used in
case of system component failure or in case of emergency. This safety feature
can be accessed through a two-position momentary key switch. A Reset Button
and a Status Led are also provided. (See fig. on section 4.4.8 on page 35).
A bridging device may be provided if it’s located outside of the crane operator’s
cab and it’s under lock and key and it resets automatically at engine stop not
later than 30 min.
Upon activation of the bridging device, the speed of all movements increasing
the loading condition is fixed at
15%
max (
25%
in some machines) of the
permissible working speed for the corresponding load case.
Furthermore, when the bridging device is enabled, the external alarm and the
external warning red light are activated. An override message flashes on the
system display.
The bridging is activated when:
•
The momentary switch is turned to the
“Indicator override”
position.
The bridging is cancelled when:
•
The reset button is pressed or
•
The engine stops or
•
The bridging is active for more than 30 min.
4.4.8.1
Bridging device (cont’d)
36
Telescopic Cranes Pressure Sensing
Instruction Manual
i3500 Operation
