Snag Overlaod Systems. Made in Germany.

Definition Snag Load Case • Sudden stopping of an empty or loaded spreader in a ship cell or other obstacle/barrier during the hoisting procedure of a crane. • Especially at high speed hoisting a sudden and extreme overload occurs. • Even a detection with conventional load cells does not provide stopping of the hoist fast enough due to slow PLC delays and motor inertia. Consequences 1 Broken ropes 2 Broken gears 3 or even worse

Snag Overload System Motor Malmedie Safety Coupling MSC (see Malmedie catalogue) Malmedie Gear Coupling (see Malmedie catalogue) PINTSCH BUBENZER LiTec® brake disc PINTSCH BUBENZER thruster disc brake SB28 with VSR unit (see data sheet A04) PINTSCH BUBENZER emergency brake SF with CMB unit – fast setting execution (see data sheet B03) PINTSCH BUBENZER SOS PLC Malmedie Drum Coupling TTX (see Malmedie catalogue) PINTSCH BUBENZER power unit (see data sheet B04) Conventional Hydraulic System • A snag load case is detected by electronic load cells. • A PLC opens a hydraulic valve and large hydraulic...

A Snag Case B SF brake closed C 90% contact force SF brake Snag Load Case •At a Snag Overload, safety elements of the MSC mechanically separate the motors from the drive without exceeding an adjustable maximum torque. • The remaining inertia of the drive is minimized by using LiTec® brake discs. • Sensors detect the trip of the safety elements and an ultra fast PLC closes the safety brakes. • When the service brakes are closed, the safety brakes will be opened again. The rope drum is held by the service brakes only. • The crane operator can now let down the load by using the hoist master switch. A...

PINTSCH BUBENZER GmbH Friedrichshüttenstr. 1 D-57548 Kirchen-Wehbach Telefon +49 27 41/94 88-0 Hünxer Str. 149 D-46537 Dinslaken Telefon +49 20 64/602-0 www.pintschbubenzer.de