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References high-voltage motors

Cement plant, Algeria

The EMZ team delivered a motor to an Algerian cement plant as a one-to-one replacement for a slip ring motor with plain bearings. The construction size and foot dimension were adjusted with the aid of a base frame. The motor was assembled by the EMZ workshop team.

The lubrication facility required for the hydrostatic plain bearings, as well as the pipelines, were punctually provided with the support of regional partners.

In conclusion, the plain bearing machine, including the lubrication facility, were successfully tested in EMZ’s own test facility.

Split ring motor:

Manufacturer: EMZ | Capacity: 3,700 kW | Voltage: 5,500 V | Frequency: 50Hz Revolutions: 743 rpm | Protection type IP 23 | Coolant type: IC 01

Cement plant, France

EMZ supplied a 1,800 kW slip-ring motor to a french cement plant to be used as a mill drive. 

The motor is specially designed to be electronically and mechanically interchangeable and was put into successful operation on site by EMZ personnel.

  • Identical installation dimensions
  • Identical terminal-box position for rotor and stator terminal box
  • Installation and start-up by EMZ personnel in France

Three-phase high-voltage slip-ring motor:

Make: EMZ | Performance: 1,800 kW | Voltage: 6,600 V | Speed: 1,481 rpm | Safety Class: IP 55 | Cooling system: IC611 | Weight 7,300 kg


EMZ supplies 5,300 kW compressor drive to a manufacturer of technical gases after breakdown

The breakdown of a compressor drive stopped the production of a new air separation plant in Austria.

Fortunately, EMZ was able to offer a 5,300kW squirrel-cage motor from stock. The motor could be modified and delivered within a fortnight.

In co-operation with the operator and the manufacturer of the compressor, all data were gathered for the starting-up sequence calculation. A detailed calculation of the complete drive train was made as well, to reduce all possible risks before the installation. Our EMZ service personnel supported the customer upon installation and commissioning so that the operator could promptly continue with the production. 

High-voltage squirrel-cage motor:

Make: ABB | Performance: 5,300 kW | Voltage: 6,100 V | Frequency: 50Hz | Speed: 1,490 rpm | Protection type: IP 23 | Cooling system: IC01


Individual modification of a 4.200kW slip-ring motor for mill drive application in the United States

EMZ received an inquiry for an interchangeable 4.200kW slip-ring motor from an American customer.

An on-site inspection was arranged promptly to discuss all necessary adjustments with the responsible engineers in the US cement plant.

Based on the information we obtained, we could modify a slip-ring motor from stock for the operation of 4,160V at 60Hz within a period of only three weeks. Further modifications were made at the new rotor- and stator terminal boxes which were especially designed for this requirement. Thus, our customer was able to install and operate the 4200kW motor with the existing connecting cables.

High-voltage slip-ring motor:

Make: EMZ | Performance: 4.200 kW | Voltage: 4.160 V | Frequency: 60Hz | Speed: 1.190 rpm | Protection type: IP 55 | Cooling system: IC 611


EMZ supplies two rolling mill drives to a steel plant in Peru

EMZ France SARL had the chance to supply two slip‐ring motors to a steel plant in Peru.

For the very hard rolling mill usage, the design has to fulfill the solidly built nature of these motors. In
addition, we have met the customer’s requirements that the two motors are electrically and
mechanically interchangeable to the locally installed machines.

 

  • Electrically and mechanically interchangeable
  • Special construction for rolling mill use
  • Identical position for stator and rotor connection
  • Special version for 13.200 V stator with a voltage surge suppressor and pulse counter
  • Final acceptance with a test run in the new EMC test area together with our customer

2 pieces Slip-ring motors:

Manufacturer: EMZ | Power: 1.480 kW | Voltage: 4.160 V | Speed: 512 rpm. | Protection class: IP55
Manufacturer: EMZ | Power: 1.800 kW | Voltage: 13.200 V | Speed: 714 rpm. | Protection class: IP55


Delivery of six high‐voltage motors

EMZ supplied six high‐voltage engines to a German pump manufacturer.

The six identical squirrel‐cage motors with a power of 500 kW serve as the drive for reciprocating pumps.

Three-phase high-voltage slip-ring motor:

Power: 500 kW | Voltage: 5.000 V | Speed: 1.490 rpm. | Protection class: IP55 | Cooling system: IC411

Pump drive for a fertilizer manufacturer

EMZ supplies a pump drive for an international fertilizer manufacturer.

The squirrel‐cage motor with a power of 710 kW was produced according to the customer's requirements, dimensionally and electrically, equivalent to the existing Elin motor

Three-phase current squirrel-cage motor:

Performance: 710 kW | Voltage: 6.000 V | Speed: 2.975 rpm. | Protection type: IP55 |  Cooling type: IC81W | Weight: 4.100kg


Squirrel‐cage motors in shredder execution

EMZ has delivered a 1,100 kW high‐voltage squirrel‐cage motor together with a medium‐voltage soft
starter as a drive for a shredder application to a Germany facility.

The motor is designed as a flexible spare unit for two installation locations with different dimensions.

  • Identical mounting dimensions for two different foundations
  • Two shafts according to the customer’s specifications
  • Terminal boxes for star‐delta start with identical position as the existing drive
  • Preparation for alternative acceleration with a medium voltage soft starter
  • Vibration resistant up to 28mm / s

Three-phase current squirrel-cage motor:

Make: EMZ | Performance: 1.100 kW | Voltage: 6.000 V | Speed: 592 rpm. | Safety class: IP55 | Cooling type: IC611


EMZ Deliver 17-Ton Motor by Air Freight

EMZ delivered a high-voltage slip-ring motor by air freight to the island of La Réunion in the Indian Ocean.

Our subsidiary in Cernay/France received an emergency call from a sugar factory in the French overseas department of La Reunion.

Our customer was in trouble: one of the two slip-ring motors of a tandem drive had failed. The motors drive a cane shredder that is used for the factory?s entire sugar production.

Because the breakdown occurred during the sugar campaign, and cane sugar cannot be stored but must be processed immediately after harvesting, speed was of the essence.

A matching slip-ring motor from EMZ?s stock was modified by our workshop team within four working days and adapted to the tandem drive. The air freight delivery was organised in close co-operation with our customer and our logistics? partner. The air-freight packing for the 17,000 kg heavy engine was custom-built according to Air France Cargo?s requirements.

The express transportation of the 2,500 kW slip-ring motor commenced by lorry from Recklinghausen to Charles de Gaulle airport in Paris and then by aeroplane on Air France Cargo on a journey of over 10,000 kilometres to the operational site on Reunion Island.

High-voltage slipring motor:

Make: EMZ | Performance: 2.500 kW | Voltage: 5.500 V | Protection type: IP55 | Cooling type: IC 611 | Weight: 17.000 kg


Express delivery for a power plant in North Rhine Westphalia

On a Friday afternoon in a power plant in the heart of the Ruhr region, a sudden failure of a 1,080 kW motor weighing six tons occurred. The Recklinghausen-based company, EMZ, came to the rescue and repaired the damage in just under 24 hours.

The unusual high-voltage motor with its output of 1,080 kW operates a pump on the industrial site. A prolonged failure of this engine would have meant a partial shutdown of the power plant. Thus, it was vital to find a solution as fast as possible. Mr Stefan Beese, the Managing Director of EMZ, told us: "Our service personnel were on site within an hour to collect all the technical data and to find a solution together with the operator." EMZ had a suitable motor in stock and it was adapted to the specific requirements in EMZ?s workshop, fitted immediately on site and put into operati

Three-phase high-voltage squirrel-cag-motor:

Brand: Siemens | Output: 1.080 kW | Voltage: 6.000 V | Speed: 2.986 U/min. | Safety class: IP 55 | Cooling system: IC 411 | Weight: 6.000 kg


Urgent air-freight delivery for a Chinese cement plant

EMZ delivered a brand-new high-voltage motor for an induced-draught fan to a Chinese cement plant by air.

Thanks to the high availability of stock, EMZ provided a suitable motor immediately. Their service team modified it and, within just two days, the machine with its adapted terminal boxes was flown to China.

The perfect co-operation of logistics with the air-freight company allowed the Chinese customer to restart production only one week after the breakdown.

Three-phase squirrel-cage motor:

Make: EMZ | Type: AKR 400-06 | Voltage: 500 kW | Voltage: 6.600 V | Rotational speed: 992 rpm. | Protection type: IP55 | Cooling type: IC411

315 kW slip-ring motor for a shaft impactor in Germany

A 315 kW high-voltage slip-ring motor to drive a shaft impactor was delivered to a German customer.

  • Stable cast-iron engine casing
  • Identical electrical data
  • Identical installation and connection dimensions
  • Identical terminal-box position

Three-phase high-voltage slip-ring motor:

Brand: EMZ | Output: 315 kW | Voltage: 6.000 V | Speed: 740 U/min. | Safety class: IP55 | Cooling system: IC411 | Weight: 4.350 kg


2 x 2,000 kW slip-ring motors for a cement ball mill

EMZ delivered two slip-ring motors for a German cement plant.

According to the cooling method IC31, clean cooling air is fed to the motors to ensure a safe operation and long service intervals.

  • IM1002 design with second shaft end for nominal torque
  • Mounted cooling-air cover for the connection of pipes

Three-phase high-voltage slip-ring motor:

Brand: EMZ | Output: 2.000 kW | Voltage: 10.000 V | Speed: 495 rpm. | Safety class: IP23/R44 | Cooling system: IC411 | Kühlart: IC 01/31 | Weight: 15.700 kg


3 x 1,200 kW fan drive for a German cement plant

EMZ delivered three variable-speed squirrel-cage rotors to a German cement plant to drive heat-exchange fans.

  • Special insulation for stator winding and converter operation
  • Insulated bearings on the NDE side

Three-phase high-voltage slip-ring motors:

Brand: EMZ | Output: 1.200 kW | Voltage: 690 V | Speed: 992 rpm. | Safety class: IP55 | Cooling system: IC611 | Weight: 6.300 kg


3,500 kW ball-mill drive for a cement plant in England

EMZ delivered a 3,500 kW high-voltage slip-ring motor to England as a mill drive for a cement ball mill.

The motor replaced an existing drive and is designed to be electrically and mechanically interchangeable.

  • Identical installation dimensions/Identical terminal-box position
  • Identical position of the connecting bolts for stator and rotor connection
  • Delivery with Rogowski coils for partial discharge measurement
  • Installation and start-up by EMZ personnel in England
  • Recording of start-up behaviour with a four-channel plotter and optimisation of the starter settings

Three-phase high-voltage slip-ring motor

Brand: EMZ | Output: 3.500 kW | Voltage: 11.000 V | Speed: 992 rpm. | Safety class: IP55 | Cooling system: IC611 | Weight: 19.800 kg


2,800 kW slip-ring motor for a cement ball mill in Ireland

EMZ supplied a 2,800 kW high-voltage slip-ring motor to Ireland as a drive for a cement ball mill.

The motor is designed with a concentric tube-cooling system according to the cooling type IC511 and serves
as an identical replacement machine for an existing drive. With its special construction, we guarantee electrical and mechanical interchangeability.

  • Identical installation dimensions/Identical terminal-box position
  • Identical position of the connection bolts for stator and rotor connection

Three-phase high-voltage slip-ring motor:

Brank: EMZ | Output: 2.800 kW | Voltage: 6.600 V | Speed: 992 rpm. | Safety class: IP55 | Cooling system: IC511 | Weight: 16.500 kg

2,400 kW slip-ring motor for a raw-mill drive in Estonia

EMZ delivered a new 2,400 kW slip-ring motor to a cement plant in Estonia and put it into successful operation.

The motor replaced a defective drive and, with its customised foot dimensions and terminal-box positions for stator and rotor terminal boxes, it is designed to be interchangeable.

  • Identical installation dimensions/Identical terminal-box
  • Installation and start-up by EMZ personnel in Estonia 
  • Recording of start-up behaviour with a four-channel plotter and optimisation of the starter settings

Three-phase high-voltage slip-ring motor:

Brand: EMZ | Output: 2.400 kW | Voltage: 6.000 V | Speed: 990 U/min. | Safety class: IP55 | Cooling system: IC6111 | Weight: 11.500 kg


1,800 kW slip-ring motor as a mill drive for a cement plant in Belgium

EMZ supplied a 1,800 kW slip-ring motor to a Belgium cement plant to be used as a mill drive. 

The motor is specially designed to be electronically and mechanically interchangeable and was put into successful operation on site by EMZ personnel in January 2013.

  • Identical installation dimensions
  • Identical terminal-box position for rotor and stator terminal box
  • Installation and start-up by EMZ personnel in Belgium

Three-phase high-voltage slip-ring motor:

Brand: EMZ | Output: 1.800 kW | Voltage: 6.600 V | Speed: 1.481 rpm. | Safety class: IP55 | Cooling system: IC611 | Weight: 7.300 kg


8,350 kW drive motor for a sinter fan in a steel plant

EMZ shipped an 8,350 kW reserve drive for a large sinter fan to a steel plant.

The delivered motor was specially-designed for this particular application and is electrically and mechanically interchangeable with the machine installed on site.

  • Identical electrical data
  • Identical installation and connection dimensions
  • Identical terminal-box position
  • Identical position of connection bolts for stator and rotor connection

Three-phase high-voltage slip-ring motor:

Brand: EMZ | Output: 8.350 kW | Voltage: 6.600 V | Speed: 745 rpm. | Safety class: IP55 | Cooling system: IC511 | Weight: 37.500 kg


800 kW conveyor-belt drive for Africa

EMZ sent a high-voltage slip-ring motor to Africa to drive a conveyor belt in an open-cast phosphate mine.

  • An electrically and mechanically interchangeable replica for an existing drive
  • Construction with cooling type IC411, special design with modified cooling air flow as a replacement
    for a defective motor with concentric tube-cooling system according to IC511.

Three-phase high-voltage slip-ring motor

Brand: EMZ | Output: 800 kW | Voltage: 5.500 V | Speed: 1.485 U/min. | Safety class: IP55 | Cooling system: IC411


2,200 kW three-phase squirrel-cage rotor for a speed-regulated converter drive

A 2,200 kW squirrel-cage rotor, intended for use as a speed-controlled converter drive for a compressor test bench owned by a renowned German plant manufacturer, was accepted and delivered.

Because of the requirement for a wide speed-manipulating range, the motor was constructed with an air/water heat exchanger with additional external fans for the internal cooling air circuit.

  • Special insulation of the stator winding
  • Insulated rolling bearings on the NDE side
  • Delivery with rotary pulse encoder
  • Water cooler for an increased operating pressure of 9 bar

Three-phase high-voltage squirrel-cage rotor:

Brand: EMZ | Output: 2.200 kW | Voltage: 690 V | Speed: 1.784 rpm. | Safety class: IP55 | Cooling system: IC86W7 | Weight: 6.100 kg

Individual reconstruction of a 1,700 kW motor for a ball mill drive

EMZ delivered a spare motor for a total of 3 cement mill drives. The original motors were installed in a German cement plant over 40 years ago.

The 1,700 kW motor has an electrical and mechanical interchangeable design and can be installed
on-site without any modifications.

Three-phase high-voltage slip-ring induction motor:

Brand: EMZ | Output: 1.700 kW | Voltage: 10.000 V | Speed: 995 rpm. | Safety class: IP23 | Cooling system: IC31 | Weight: 8.600 kg


Urgent delivery of a high voltage slip-ring induction motor to Namibia

EMZ delivered a brand new 1,500 kW slip-ring induction motor including suitable transformer and starter to Namibia by air freight. The entire equipment was available from our stock and was ready for dispatch within one week. The drive was put into operation by our own personnel on-site to drive a ball mill fan in a cement plant.

Three-phase high voltage slip-ring induction motor:

Brand: EMZ | Output: 1.500 kW | Voltage: 6.000 V | Speed: 989 rpm. | Safety class: IP55 | Cooling system: IC611 | Weight: 9.500 kg


4,200 kW motor for cement plant in Tunisia

EMZ delivered a 4,200 kW motor from stock to Tunisia to replace a defective cement mill drive.

Based on the very short delivery time of one week, the end client could restart production
without further delay.

Three-phase high voltage slip-ring induction motor:

Brand: EMZ | Output: 4.200 kW | Voltage: 6.000 V | Voltage: 995 rpm. | Safety class: IP55 | Cooling system: IC611 | Weight: 14.600 kg


Breakdown of a 4,400 kW ball mill drive in Poland

After the breakdown of a ball mill drive in a cement plant in Poland, EMZ was able to supply a brand new replacement motor from stock.

The picture shows three available slip-ring induction motors ready for dispatch from our stock in Recklinghausen. 

The state-of-the-art design and minimum overall size of the motor made it possible for the operating company to install it on the existing foundation. Owing to the small frame size of our motors, the end client was able to install it on the existing foundation.

High voltage slip-ring induction motor:

Brand: EMZ | Output: 4.400 kW | Voltage: 6.300 V | Speed: 993 rpm. | Safety class: IP55 | Cooling system: IC611 | Weight: 16.600 kg


1,200 kW main drive for wire-rolling mill

EMZ supplied an interchangeable 1,200 kW slip-ring induction motor for a wire-rolling mill.

The motor was mechanically adapted to the existing foundation. The electrical design took the special
requirements of the load peaks of a steel wire-rolling mill into account.

Three-phase high voltage slip-ring induction motor :

Brand: EMZ | Output: 1.200 kW | Voltage: 5.000 V | Speed: 740 rpm. | Safety class: IP55 | Cooling system: IC616 | Weight: 9.500 kg

1,950 kW motor for Italian steel plant

After the breakdown of a coal-mill drive in an Italian steel plant, a 1,950 kW slip-ring induction motor was delivered within one week.

The mounting dimensions and the design of the top-mounted heat exchanger were adapted to meet the customer's individual specifications.

Three-phase high voltage slip-ring induction motor:

Brand: EMZ | Output: 1.950 kW | Voltage: 6.000 V | Speed: 989 rpm. | Safety class: IP55 | Cooling system: IC611 | Weight: 9.400 kg


630 kW pump drive for oil field in Lower Saxony

Siemens Germany ordered a completely overhauled and modified pump drive for an oil field in Lower Saxony.

The delivery included installation and commissioning by our own service personnel on-site.

Scope of EMZ services

  • Alignment of maximum frame size to 560 mm
  • Adaptation of the fixing holes to meet the existing dimensions
  • Modification of 6 kV motor connection to Pflister Euromold connectors
  • Laser alignment of motor
  • Direction of rotation checked for entire system
  • Vibration analysis of the complete system

Three-phase high voltage squirrel cage motors:

Brand: VEM | Output: 630 kW | Voltage: 6.000 V | Speed: 2.973 rpm. | Safety class: IP23 | Weight: 3.500 kg


6,000 kW slip-ring induction motor for compressor-test bench

EMZ supplied a 6,000 kW slip-ring induction motor to a well-known German compressor manufacturer.

This individual machine can be operated as a slip-ring induction motor, supplied with 10 kV at 50 Hz,
as well as a Variable Frequency Drive fed by a frequency converter with 11kV at 60 Hz.

Three-phase high voltage slip-ring induction motor with continuous contact brushes:

Brand: EMZ | Output: 6.000 kW | Voltage: 11.000 V VFD | Speed: 1.800 rpm. | Safety class: IP55 | Cooling system: IC81W | Weight: 17.700 kg


Prompt delivery of a 2,000 kW motor to Turkey

EMZ modified and supplied a 2,000 kW three-phase squirrel cage motor from stock for a refiner drive within 4 working days.

To meet the technical requirements, the ABB Motor was modified with a second shaft end for mounting
a pony motor. Also the stator windings were reconnected from 10,000 kW Star to 6,000 kW Delta.

Three-phase high voltage squirrel cage motor:

Brand: ABB | Output: 2.000 kW | Voltage: 6.000 V | Speed: 1.485 rpm. | Safety class: IP55 | Cooling system: IC81W | Weight: 6.800 kg


New production of a 2,500 kW motor for Slovenia

EMZ delivered a 2,500 kW squirrel cage motor to a paper mill in Slovenia as a refiner drive.

Three-phase high voltage squirrel cage motor:

Brand: EMZ | Output: 2.500 kW | Voltage: 6.300 V | Speed: 990 rpm. | Safety class: IP55 | Weight: 16.000 kg

520 kW cooling water pump drives for German nuclear power plant

EMZ received an order for three pump drives for intermediate circuit cooling water pumps in a German nuclear power plant.

The motors had to be designed to be 100% mechanically-interchangeable. The machines fulfilled all safety applications and acceptance tests.

High voltage squirrel cage motor:

Brand: ATB/Schorch | Output: 520 kW | Voltage: 10.500 V | Speed: 10.500 rpm. | Safety class: IP55 | Cooling system: IP55 | Weight: 5.000 kg


1,700 kW fan drive for Egyptian power plant

EMZ supplied a 1,700 kW three-phase squirrel cage motor for an Egyptian power plant.

The high-voltage motor was designed to be installed on the existing foundation without modifications. Owing to the fan?s extremely large external moment of inertia, our experts selected a special rotor design to ensure a reliable run-up.

Three-phase squirrel cage motor:

Brand: EMZ | Output: 1.700 kW | Voltage: 6.000 V | Speed: 990 rpm | Cooling system: IC24W | Weight: 8.300 kg


Bodyflying-Anlage, Frankreich

EMZ erhielt einen Auftrag zur Lieferung der kompletten Antriebseinheit eines 1.500-kW-Ventilatorantriebs für eine neue Bodyflying-Anlage. Der Motor wurde zusammen mit einem passenden Hochspannungs-Sanft-Anlasser sowie der kompletten Schaltanlage ausgeliefert. Die Bodyflying-Anlage wurde in Frankreich installiert und anschließend in Betrieb genommen.

Kurzschlussläufermotor:

Fabrikat: EMZ | Leistung: 1.500 kW | Spannung: 6.000 V | Drehzahl: 990 U/min. | Schutzart: IP55 | Gewicht: 11.500 kg


355 kVA rotating generator set

EMZ produced an individual rotating generator set. The motor including generator was mounted on a self-supporting base frame ? directly coupled to a gearbox.

The motor is started by a soft starter, all monitoring and measuring instruments are installed in a switch cabinet. The series-connected adaption transformer allows 10 additional test voltages in the range between 200 V and 575 V.

Rotating motor generator set:

Brand: EMK / Leroy-Somer | Output: 355 kVA | Voltage: 400 V - 50 Hz // 460 V - 60 Hz | Speed: 1.500 / 1.800 rpm. | Safety class: IP54 / IP23 | Cooling system: IC411 / IC01 | Weight: 4.500 kg