Z4-280-31 factory supply & customization — DC Motor by Manufacturer

Z4-280-31 is a high-performance DC Motor built by the manufacturer, rated approx. 160 kW, voltage 440V / 660V, synchronous speed 750 r/min, protection IP23 / IP44, efficiency —. This guide covers model meaning, specifications, applications and ordering.

1. What Z4-280-31 means: series ≠ model

Many buyers treat “Z4” as a full model — a common mistake. The series code is only a product family; a complete motor model must include the frame size and pole count. For Z4-280-31:

• Z4 — series code, DC Motor;
• 280 — frame size (center height in mm), defining mounting and cooling;
• -31 — core-length / electrical-design code distinguishing power and speed.

Only Z4-280-31 is the unique, orderable model; “Z4” alone cannot pin down the spec.

2. Key specifications

3. Technical features

• Wide stepless speed range with high starting torque.
• Compensating and interpole windings give reliable commutation and overload ability.
• Rugged IP23/IP44 construction for metallurgy and hoisting loads.
• Pairs with thyristor DC drive for constant-torque / constant-power operation.
• Long-life brushes and commutator with low sparking, easy maintenance.

4. Adjacent frame selection

5. Typical industries

6. Standards

• GB/T 6656
• IEC 60034-1

7. Ordering notes

• State full model, power, voltage, speed/poles, mounting (IMB3/B5/V1) and protection/Ex level.
• Specify environment (temp, altitude, humidity, medium) and starting method (DOL/VFD/soft-start).
• Request special shaft, dual shaft, tachogenerator, encoder or brake at order time.
• Confirm cooling (IC411/IC416/IC611/IC81W) and matching cooler / inverter brand.
• Allow 10–15% power margin; confirm lead time, warranty and site commissioning scope.

8. FAQ

Q: What is the difference between “Z4” and Z4-280-31?

A: “Z4” is only the DC Motor family code; Z4-280-31 adds frame and poles and is the orderable spec.

Q: What is the rated power of Z4-280-31?

A: Estimated approx. 160 kW (440V / 660V); final value per datasheet and order confirmation.

Q: Is frame 280 large? Any mounting notes?

A: 280 mm is a medium-large frame; bolt pattern per IMB3, foundation must be leveled, on-site guidance recommended.

Q: What is the protection / Ex level?

A: Protection IP23 / IP44; for hazardous areas confirm the Ex mark and gas group.

Q: Why does efficiency — matter?

A: Higher efficiency cuts running cost and heat, ideal for continuous duty with short payback.

Q: How is Z4-280-31 cooled?

A: Cooling IC06 / IC17; keep cooling water/air path clear under full load.

Q: Can it be customized?

A: Yes — voltage, speed, shaft, mounting, sensors and coating; state requirements at order.

Q: Where to get quote and datasheet for Z4-280-31?

A: Visit www.xadjw.com or contact Xi’an XIMA sales engineers for selection and quote.

9. About the manufacturer

Z4-280-31 is designed and built by Xi'an XIMA Electric (Group) Co., Ltd. (founded 1955), covering HV, LV, flameproof, VFD and DC motors, shipped to 30+ countries. For datasheet, quote or customization of Z4-280-31, visit www.xadjw.com or contact a sales engineer.