Malmedie Snag Overload System

Snag Overload System

Snag Overload System (SOS) is the first non-hydraulic snag load protection system for container cranes. It eliminates the danger of structural damage starting at the motor, which is beside the brake disc the major source of snag inertia load. At any kind of overload, the inertia and the driving force of the (AC!) motor are separated from the hoist by the MSCII within one millisecond. To reduce the remaining inertia coming from the brake disc.

Pintsch Bubenzer LiTec brake discs offer 60% less inertia than steel discs in use. The specially designed PINTSCH BUBENZER service and emergency brakes (fast setting execution) avoid at the same time a reverse 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 can react.

Besides the advantage of having even fewer maximum rope forces compared to a conventional snag system, the system is much less in weight, has low maintenance, and is cost-effective.

 

 

Single-Rope-Protection 

In addition and independent of the mechanical protection, the system is equipped with a so-called Single-Rope-Protection (SRP). A second channel of the (usually mounted) load cells is used to permanently monitor loads of each single wire rope ultra-fast.

In case of overload of only one wire rope, the SOS-PLC closes the emergency brakes and the coupling will trip (speed dependent). By this, the development of Snag situations is detected even faster and on top, the system is redundant.

Another advantage of Single-Rope-Protection is the empty spreader operation (detected by using the twist lock signals) when the trigger point is set to an even lower value, as the maximum rope loads are much less on empty spreader operation compared to load operation.

HVH Industrial Solutions is an authorized distributor of MALMEDIE.

We work closely with the MALMEDIE engineering team to provide superior customer service and engineering support. 

 If you have any questions write us via live chat (one of our team members will answer your questions), give us a call, or send us a quote request. The HVH team is always ready to help you.

 

Snag Overload System

 

 

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