BSHC21 23 Load Limiter 3B6 Operators Manual

3B6 designs and manufactures electronic systems for mobile machines, focusing on earth moving and lifting. 3B6 offers total collaboration beginning with definition of system specifications, supplying the hardware, developing the software, interfacing with electronic power trains, aftersales data logging and management, and GPS vehicle localisation.

3B6 limiters have been designed to accomplish the safety functions of the crane. In automatic mode, the limiter compares the lifted load with the maximum table load giving the necessary data to the operator to operate in safety conditions. The main supplied parameters are: – lifted load
– maximum load
– upsetting percentage
– lighting lamps (green, yellow, red)
– operating radius
– angle
– unwinding
– other particular conditions

The system determines the lifted load by drawing it by means of the appropriate sensing devices (pressure or loading cell), by means of the angle measurements and the unwinding it draws the measure of the operating radius.
The lifted load is continuously compared with the maximum liftable load, withdrawn from the loading table.

From all this, three possible situations are possible: 1) Safety: the green lamp is lighted and no acoustic signal is present, it means
that the lifted load is less than the 90% of the maximum one.
2) Pre-alarm: the yellow lamp is lighted and the buzzer emits an intermittent noise,
the situation is of pre-alarm, it is present when the lifted load is more
than the 90% end less than the 100% of the maximum allowable load.
3) Alarm: the red lamp is lighted and the buzzer emits a continuos noise, we
are in blocking situation either the lifted load is more the allowable
load then the stop of the manoeuvre occurs.

Only the operations allowing the crane to return in the safety condition are allowed.