Industrial AC motor range

The YZZ3.7-4 row at 50 Hz lists 3.7 kW, 24 N·m, 7.8 A and 1430 r/min. A separate speed-extension diagram uses 1500 r/min as a reference. Keep the rated loaded speed and the diagram reference distinct when comparing an existing spindle.

For YZZ3.7-4, the power-speed table gives n1 = 1500, n2 = 6000 and n3 = 8000 r/min, with P1 = 3.7 kW and P2 = 2.2 kW. These are labelled points on the manufacturer’s operating diagram, not permission to demand 3.7 kW at every speed. Send the required cutting torque and speed points so the offered curve can be checked.

State the existing drive, feedback requirement and low-speed running time. The motor’s independent fan must be accommodated in the machine wiring and cooling arrangement. A matching 3.7 kW nameplate alone does not establish feedback compatibility or suitability for the required speed cycle.

Give the indexing movement, time at stall, braking interval, rest time and cycles per hour. The source identifies S5 but does not give a universal duty percentage for every machine. Ask for approval of that actual cycle rather than treating the catalogue stall torque as a continuous hold rating.

Include the available DC brake supply, release/engagement sequence and required holding load. The 3 N·m brake value is not the same quantity as the 5 or 9.4 N·m motor stall torque. The supplier’s wiring and brake data must match the offered suffix and turret controller.