Load indicator system LIS-SE:

─     The LIS-SE is a microcontroller-controlled system for load measurement and evaluation on hoists.

─     The main function of the LIS-SE is overload protection of the hoist through evaluation of the current and voltage of the hoist motor. The message of an overload can be sent visually as well as acoustically. The switching points of the overload protection can be set to maximally 110% of the maximum load capacity. The switching points can be set variably in 2% steps.

─     Lifting the load with a sudden jolt is prevented by the switch-off of the fast lifting speed in the event of a rapid load increase.

─     The LIS-SE can additionally output status or error messages.

─     The load population recorder (option) shows the theoretical service life of the crane, its actual hours of use, the number of operating hours and the crane's remaining service life.

─     The LIS-SE galvanically isolates the signals at the inputs from those at the outputs.

─     The automatically controlled regenerative braking during lowering increases the service life of the brakes.

─     The permanent monitoring of the motor current with commensurate switching of the contactors extends the service life of the contactors.

─     The hoist motor always starts at slow lifting speed and switches to fast lifting speed only after a set time has elapsed, thus preventing a rapid load increase and reducing the start-up current.

─     Two or more hoists can be monitored in joint operation. This does NOT correspond to the synchronization control system! The synchronization control system is a separate ABUS product.

─     An inching counter prevents the lifting of the load in inching operation. When the set number is exceeded, lifting is no longer possible. Operation can be resumed by pressing the “Lower” button for at least 3 s.

Current transformer module:

─     The load evaluation is carried out through the measurement of the voltage and current in the connection cables of the hoist to be monitored.

─     An external current transformer module performs the measurement.

─     The size of the current transformer modules depends on the rated current of the hoist motor at fast lifting speed.