Overload Protection Systems

The KRÜGER PCD-Indicator with integrated micro-processor features clear and easy to read information by an LC-Display and user-friendly data input.

It offers various memories to store different material, trucks or customers and is designed to meet rough operating conditions (working temperature from -25 °C to +70 °C).

The double-line LC-Display shows the:

- code number of the actual data memory

- information on the measuring process

- target load

- actual load

- total load

Automatic weighing for wheel loaders without the need to stop the loading process to take the load information is performed by KRÜGER’s DLR (Dynamic Load Recording) technology.

Data transfer to an on-board printer or by downloading to a personal computer is possible by use of the integrated interface.

The KRÜGER Large Numerical Displays are equipped with bright LEDs and are ideal for use wherever the weight of the lifted load must be legible at greater distance.

They are available as stand-alone displays (sensor together with large numerical display) or as a supplement to the operator’s cab-installed display.

The Basic Switching Amplifier BSA is an easy and economic safety system for all applications, where 2 loadsensor inputs and 3 cut-off relays are sufficient.

A popular combination for EOT cranes is the BSA together with the rope tensiometer R1.1. R1.1 is clamped on the end of the lifting rope. Without the need to cut or dismount anything.

Only a fixed spanner SW 24, a screw driver and voltmeter are required for complete configuration and commissioning. The use of an efficient microcontroller supplies the system with a high degree

of safety and precision at a reasonable price.

Overload Protection Systems KRÜGER Programmable Switching Amplifiers protect cranes and container transporters in harbours and industrial areas. Thanks to their free and easy programming they are used in a lot of similar applications.

The Programmable Switching Amplifier PSA 3/1 win shows and monitors precisely the analogue data of the load sensors, which are used when the crane is operated.

It is possible to freely programme the processing of this data using numerous software components available for this purpose.

Programming is done simply and quickly using the software configuration manager via PC laptop. The load data from the crane can be added, subtracted, multiplied with the fixed and variable values and subsequently compared. Reference is made to differing crane configurations via digital inputs, that activates certain adjustments inside the PSA 3/1 win.

Finally the data is monitored in comparison with the maximum load of the crane. In all unsafe situations due to overloading, underloading or off-centre loading, disturbance of a sensor or other defects the relevant relays will cut off immediately in order to return the crane to a safe condition. A special dynamic monitoring system also recognises if a load is wedged or hooked up and secures the crane in such situations