A European spec chain hoist 3 t is a hoist built to European design standards, using a chain rather than a wire rope to lift the load. European style hoists are known for their compact design, low headroom, and lightweight construction. On this crane, the European spec chain hoist handles the 3 t lifting capacity. With full VFD, the hoist gives a smooth lifting speed range of 0.8–5.0 m/min, which is useful for handling delicate or precise loads. The compact size of the hoist also helps reduce the overall height of the crane, which is important when the building has limited headroom.

Full VFD on the hoist, trolley travel, and crane travel gives smooth acceleration and deceleration, precise load positioning, and lower mechanical wear. The lifting speed is 0.8–5.0 m/min, the trolley travel is 2.0–20 m/min, and the crane travel is 2.0–20 m/min, all with VFD. This gives the operator a wide range of speeds to choose from — slow for precise positioning, faster for normal travel. VFD also reduces the starting current on the motors and helps the crane run more efficiently, which is important for a crane used regularly in a factory.

Pendant control lets the operator work from the floor near the load, which is useful for precise positioning. Remote control lets the operator step back to a safe distance and get a better view of the load. Having both modes gives the operator flexibility to choose the safest and most convenient control method for each lift. For a light duty crane in a factory, this flexibility is convenient because the load and the surroundings can change from lift to lift.

BMHO = European semi-gantry crane. "3t" = 3 t lifting capacity. "12m" = 12 m span. "3m" = 3 m lifting height. "A5" = ISO A5 duty class. A5 is a light to medium duty class, suitable for indoor factory use where the crane is used regularly but not continuously at full load.

P15 rail is a light rail profile used for cranes and light traveling equipment. It is matched to the 29.6 kN maximum wheel load and the A5 duty of this crane. P15 rail is easy to install, readily available, and provides a durable running surface for the wheels. For a 3 t crane with a 12 m span, P15 rail is a good match for the wheel loads and travel speeds. It is also a common rail profile in many factories, so it is easy to source and install.

The ≥200 mm clearance between the workshop backup (the wall or column) and the crane peak (the highest point of the crane) ensures that the crane does not hit the building structure during travel. This clearance is important for safety and for the smooth operation of the crane along the runway. The value is specified by the crane manufacturer based on the crane dimensions and the building structure. For this crane, ≥200 mm is required to allow for manufacturing tolerances, thermal expansion, and small movements during travel.

This crane runs on 3-phase, 380 V, 50 Hz. This covers the 3.2 kW lifting motor (NR), the 0.4 kW trolley travel motor (NR), the two 0.4 kW long travel motors (SZW-050), the VFD drives, and the control system. If your site uses a different voltage or frequency, Yuantai can supply the crane with a custom power supply to match your local grid.