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Z4-250 DC Motor

Overview

This frame sits in the mid-power section of the Z4 family, balancing output capability, installation flexibility, and retrofit compatibility for continuous industrial operation.

In the Z4 catalogue, this frame is usually selected when users need a practical balance between electrical output and installation envelope for continuous industrial duty.

Manufacturer Perspective

As an experienced DC motor manufacturer and industrial DC motor manufacturer, we manufacture medium-frame Z4 motors for balanced output, installation flexibility, and broad process compatibility. Many users choose us as a long-term DC motor supplier and China DC motor manufacturer for continuous industrial drive systems.

For Z4-180 to Z4-250, our Z4 DC motor manufacturer approach emphasizes practical frame matching, reliable thermal behavior, and stable operation in general industrial process machinery.

Common Models in This Frame

  • Z4-250-11
  • Z4-250-12
  • Z4-250-21
  • Z4-250-21B
  • Z4-250-22
  • Z4-250-31
  • Z4-250-32
  • Z4-250-41
  • Z4-250-41B
  • Z4-250-42

Typical Specifications

  • Voltage: Typical armature voltage in sample rows: 400 V; series-level options include 160 V/440 V with other derived voltages on request.
  • Speed: 680 to 1360 r/min (typical range from sample data).
  • Power range: 99.0 to 180.0 kW (typical range from sample data).
  • Cooling options: Base methods are IC06 / IC17 / IC37; blower location for this frame is typically on the drive side.
  • Mounting form: IMB3/IMB35/IMV1/IMV15 in the Z4 catalogue scope.
  • Efficiency: Rated-point efficiency values are listed model-by-model in the technical table; actual values depend on specific model, speed, and duty.

Installation and Dimensions

Z4 frame motors follow series-level installation platforms, with dimensions largely aligned to IEC72 practice except for the axial distance “B” between the two foot holes.

For this frame, code “1/2” in model designation indicates short/long endshield variants. Detailed dimensions vary by specific model and mounting form.

Compared with adjacent frames, Z4-250 keeps the same design language but differs in shaft, cooling demand, and installation footprint corresponding to output level.

In project engineering, installation envelope differences between adjacent frames should be checked together with shaft arrangement, coupling interface, and terminal space.

Maintenance accessibility should be confirmed for brush inspection, terminal operation, and cooling-path service in the final equipment layout.

Applications

  • Extruders and heavy continuous process drives
  • Rolling mill auxiliary transmission
  • Steel and non-ferrous line retrofits requiring higher torque reserve

Compared with small frames, this frame provides higher torque and broader power combinations; compared with large frames, it keeps a more compact installation envelope.

This frame size provides sufficient torque for medium industrial drives while maintaining practical installation dimensions and good compatibility with common process machinery layouts.

Optional Configurations

  • Compensating winding versions are available as derived configurations (commonly marked with suffix ‘B’ in model code).
  • ZYS-A tachogenerator can be installed on the non-drive side when speed feedback is required.
  • Terminal box default position is right side (viewed from drive end); left side or top position is available by request.
  • Special mounting and accessory combinations can be arranged for retrofit projects.
  • IC05 separately ventilated variant (blower at non-drive side)
  • IC666 totally enclosed air-air heat exchanger variant
  • IC86W totally enclosed air-water heat exchanger variant

Related Pages

FAQ

What is the difference between Z4-250 and nearby frame sizes?

The main differences are power capability, speed combinations, installation footprint, and cooling demand. Final selection should be based on rated torque, base speed, and space constraints.

Can Z4-250 be configured with different cooling and mounting options?

Yes. Standard Z4 cooling includes IC06/IC17/IC37, and additional cooling structures may be available depending on frame range and project requirements. Mounting options are selected according to the catalogue scope for this frame.

Are all models in this frame interchangeable one-to-one?

Not directly. Even inside the same frame, armature core length, endshield version, speed class, and optional accessories can differ. Confirm mechanical and electrical details before replacement or retrofit.

Why is Z4-250 commonly used in general process machinery?

Because Z4-250 offers a balanced combination of torque capability, installation practicality, and continuous-duty reliability for medium industrial transmission systems.

Can the manufacturer customize this DC motor frame?

Yes. This frame can be customized based on project requirements, including voltage, speed, mounting arrangement, cooling method, terminal box orientation, and accessory configuration.