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 the definition of system specifications, supplying the hardware, developing the software, interfacing with electronic power trains, after-sales data logging and management, and GPS vehicle localisation.

3B6 limiters have been designed to perform the crane’s safety functions. 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 unwinding it to draw the measure of the operating radius.
The lifted load is continuously compared with the maximum liftable load specified in 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 continuous noise, we
are in a blocking situation, either the lifted load is more than the allowable
load, then the stop of the manoeuvre occurs.

Only operations that allow the crane to return to a safe condition are allowed.

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