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CESPA electro-mechanical lifting jacks, for lifting railway vehicles Each set consists of 4 columns + 1 independent movable control panel. Nevertheless it is possible to control several sets from one control panel. The jacks are projected and manufactured in conformity with the current rules and are CE type-tested. Lifting Jacks Columns • Electromechanical lifting system, with trapezoidal irreversible   screw • High quality cast bronze nut with auxiliary safety nut • Columns manually movable on floor, with hydraulic shaft • Column verticality water level • Automatic lubrication pump for nut and screw • Electromagnetic braking motors Control panel • Protection IP55 • Plugs according to the number of jacks, with safety lock • Main power voltage 380 V - three-phase - 50 Hz • Auxiliary circuits voltage 24 V • Lifting synchronisation controlled through PLC • Operator digital display • Mechanical and electrical up/down interlocked commands • Motors protected through magnetic and thermal protection   switches • Phase sequence control relay • Selection switch: individual, couple or joint operation of the jacks • Connecting cables, double isolation with protective sheath, flame- retardant length 15 mt Safety • Automatic continuous lifting balance • Nut lifted-off electronic control • Phase sequence electronic control • Plugs correct connection electronic control • Down forks obstacles electronic control • Acoustic signalling • Messages monitoring on operator display • Emergency stop buttons both on panel and columns • Total safety guards • Upper/lower electric and mechanical limit switches per jack • Programmed maintenance electronically controlled by PLC • Lifting height of each column monitoring on operator display • Internal clock monitoring on operator display • Lifting pads to verify load presence on each jack • Remote control panel on each jack • Safety relay on the emergency stop circuit • Limit switches to verify columns in right working position