SOS (Snag Overload System)

The first non-hydraulic snag load protection system for container cranes that eliminates the risk of structural damage to the crane caused by the drive train’s snag inertia load (foremost caused by the motor itself and the brake disc). If a mechanical overload event occurs, the inertia and the driving force of the (AC) motor are separated from the hoist by the MSCII-Couping within one millisecond.
To reduce the remaining inertia coming from the brake disc, Pintsch Bubenzer LiTec® brake discs offering 60% less inertia compared to traditional steel discs are used. The specially designed PINTSCH BUBENZER service and emergency brakes (fast setting execution) avoid at the same time a reverting of the rope drum. The reaction time of the system in combination with its own and separate PLC is ultra fast and completed, before conventional hydraulic systems are able to react. In addition to the advantage of having less maximum rope forces compared to a conventional snag system, the system is weighs less, is low maintenance and cost effective.