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3 phase squirrel cage induction motors

MENZEL 3 phase squirrel cage induction motors are robust, efficient and durable. They are built to cope with the toughest conditions, and reliably ensure the durable availability of your industrial facilities.

Since 1927, users around the world have been able to rely on high-quality 3 phase squirrel cage induction motors made by MENZEL. Whether they are open-circuit ventilated (IC 01 + IC 06), surface-cooled (IC 411 + IC 416), pipe-cooled (IC 511) or modularly cooled with air-air cooling (IC 611 + IC 616 + IC 666) or air-water cooling (IC 81W + IC 86W), MENZEL three-phase squirrel cage motors are highly efficient and will save you money.

To make it easier for you to choose the right drive for your industrial plant, we have categorized our wide range of asynchronous squirrel cage motors according to their various cooling types. In the following article, we present our surface-cooled 3 phase squirrel cage induction motors, of cooling types IC 411 and IC 416.

Standard operation of surface-cooled 3-phase squirrel cage motors

  • Construction types: IM B3, V1, IM B35, IM V15 
  • Protection classes: IP55 (optional IP56, IP67)
  • For grid and inverter operation
  • Voltage: from 380 V to 13,800 V 
  • Shaft height: from 280 to 560 
  • Terminal box: above, rotatable by 4 x 90° 
  • Motor housing: made of gray cast iron; optionally made of welded steel
  • Thermal utilization: F/B

Customized special designs of our short-circuit motors with cooling fins are available at any time.

We are known worldwide as specialists in customized drive technology solutions.

The advantages of our 3 phase squirrel cage induction motors

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Low operating costs

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Excellent price-performance correlation

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High level of efficiency with a low loss rate 

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Reliable and durable bearing design

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Compact, robust design for high resilience

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Good vibration values and low maintenance costs

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Low noise emissions

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Customer-specific special designs

Surface-cooled squirrel cage motors – Characteristics

MENZEL’s surface-cooled 3-phase squirrel cage induction motors (MEBKGR series) improve the operational safety of your plant. They have a compact structure, and are highly efficient yet low maintenance. The cooling of three-phase motors with cage rotors with robust gray cast iron housing or optionally welded steel housing (MEBKSR) with cooling fins (cooling types IC 411 and IC 611) makes the construction and therefore the implementation of these motors particularly flexible, as well as ensuring a long lifespan and low maintenance costs.

MENZEL surface-cooled squirrel cage motors set the standard for all conventional uses. They are successfully used worldwide in a wide range of fields, such as oil, gas, paper, chemicals, cement, and steel. Our squirrel cage motors are typically used in the process industry as drives for pumps, compressors, fans, refiners, etc. Satisfied customers and countless testimonies from around the world confirm that IC 411 and IC 416 motors are particularly well built to meet the requirements of these industries.

Available nominal voltages for surface-cooled squirrel cage motors

Nominal voltage at 50 Hz

  • Low voltage: 380 V, 400 V, 500 V, 690 V
  • Medium and high voltage: 3.000 V, 3.300 V, 5.000 V, 5.500 V, 6.000 V, 6.300 V, 6.600 V, 10.000 V, 10.500 V, 11.000 V

Nominal voltage at 60 Hz

  • Low voltage: 380 V, 400 V, 440 V, 480 V, 500 V, 525 V, 575 V, 690 V
  • Medium and high voltage: 2.300 V, 4.160, 6.000 V, 6.600 V, 11.000 V, 13.200 V, 13.800 V

All special voltages and deviating voltage tolerances can be realized on request.

Typical uses of surface-cooled squirrel cage motors (IC 411 and IC 416)

Typical areas of use:

  • Process industry 
  • Cement industry
  • Chemical and petrochemical industry
  • Oil and gas industry
  • Power plants
  • Paper industry
  • Water and wastewater management
  • Steel industry

Rib-cooled squirrel cage motors consist of:

  • Refiner and mill drives
  • Pump drive
  • Mixer drive
  • Shredder drive
  • Compressor and compactor drives
  • Fan drives 

The surface-cooling principle in squirrel cage motors (IC 411 and IC 416)

Industrially, the most common three-phase squirrel cage motor in protection class IP 55 has IC 411 cooling. For MENZEL squirrel cage motors of cooling type IC 411, the heat is emitted directly to the gray cast iron housing of the motor, and dissipated by cooling air from a fan installed on the rotor, via so-called cooling fins (surface cooling).

For special applications such as operation on a frequency inverter, our squirrel cage motors can be fitted with forced ventilation, i.e. with IC 416 cooling. The cooling air is blown over the sealed motor surface by a forced cooling fan.

We produce 2-pole squirrel cage motors with a rotation-dependent external fan. In principle, all other drives have rotation-independent external fans. The internal air circuit for IC 411 and IC 416 motors is usually independent of the direction of rotation.

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