References high-voltage motors

Flue gas desulfurization plants, Turkey

In April 2021, EMZ was able to deliver two major orders for a renowned German pump manufacturer on schedule. A total of 35 high-voltage motors and 34 low-voltage motors were manufactured for this project. 

The motors in the power range from 5.5kW to 800kW drive various special pumps in flue gas desulfurization plants (FGD) in coal-fired power plants in Turkey. While the low-voltage motors were manufactured in accordance with the applicable energy efficiency specifications, the high voltage motors had to comply with the special regulations of the power plant operators. Among other things, the high voltage motors were manufactured with silencers for the cooling air inlet, which limit the sound pressure level to 85db(A). Furthermore, the speed and the direction of rotation of the motors are monitored with additionally installed incremental encoders so that any reverse rotation of the pumps by the returning pumped medium is reliably detected and prevented. The prevailing very warm and humid climate requires optimized corrosion protection. With a special coating and 220µm layer thickness, the motors are also prepared for this requirement in the coming years. 

High-voltage motor:

Make: EMZ | Power: 450-800 kW | Voltage: 6,000 V | Frequency: 50 Hz | Speed: 1,490 rpm | Protection class: IP55 | Cooling type: IC411

Low-voltage motor:

Make: EMK | Type: B3 | Power: 5.5-90 kW | Voltage: 400/460 VD | Frequency: 50/60 Hz | Speed: 1,489/1,787 rpm | Protection class: IP55

Shredder plant manufacturer, Germany

In April 2021, another shredder motor from the EMZ Heavy-Duty Range was completed. The special design is specially designed for the operation of a shredder for metal scrap and was delivered to the renowned German shredder plant manufacturer Albert Hoffmann GmbH. The EMZ scope of supply includes the Emotron variable speed drive, suitably designed for this application, from CG Drives & Automation Germany GmbH, with whom EMZ has enjoyed a successful and competitive cooperation in the field of large drives for several years. Like the EMZ motor, the Emotron variable speed drive is designed for the torque loads that occur at intervals and adjusts the speed of the drive accordingly. In addition, the motor, which is directly coupled to the shredder via a cardan shaft, is designed to withstand vibrations up to 28mm/s thanks to its very robust and vibration-resistant design.  

Three-phase squirrel-cage rotor:

Make: AKK | Power: 499 kW (700 HP) | Voltage: 400 V | Frequency: 50 Hz | Speed: 593 rpm | Protection class: IP 55 | Cooling type: IC 511

Frequency converter in control cabinet:

Make: VFX | Power: 1,120 kW | Voltage: 400 V | Protection class: IP 54


Osmosis plant, Malta

At the beginning of July, EMZ delivered two 450kW pump drives to the Mediterranean island of Malta. The two identical motors are used in a seawater treatment plant there to ensure a sufficient supply of drinking water for the island. Therefore, the reliability of these motors has a very high priority for the customer. The motors replace two aging drives, so that the design of the new motors had to pay close attention to electrotechnical and mechanical specifications. In addition, at the customer's request, the motors were designed with a C5-M paint finish for salty ambient air and an ambient temperature of up to 50°C. In addition, the motors were fitted with noise protection hoods so that the maximum sound pressure level is 90dB(a). 

EMZ is proud to make an important contribution to the drinking water supply of the people on the island of Malta. 

Three-phase squirrel-cage rotor:

Make: EMZ | Power: 450 kW | Voltage: 6.000 V | Frequency: 50 Hz | Speed: 2.985 rpm | Protection class: IP 55 | Cooling type: IC 611

Cement plant, Australia

In April 2021, EMZ supplied a 2 MW mill drive to an Australian cement plant.

The slip ring motor was produced to customer specifications and 100% mechanically and electrically interchangeable with the existing mill drive. It was equipped with a carbon brush lifting device to reduce the previously high maintenance effort and wear of the carbon brush. In addition, almost all existing measuring and safety equipment were installed to ensure maximum operational reliability. Besides to surge capacitors and current transformers, coupling capacitors for continuous online partial discharge measurements and an arc monitoring system for the slip ring chamber were installed.

As it was not possible for the customer to participate in the final acceptance of the motor in person due to the pandemic-related travel restrictions, the final test run was performed in the test field of the EMZ and was transmitted directly to Australia via live streaming. In this way, the customer was able to accompany the acceptance directly and the order was successfully completed.

Slip ring motor:

Make: EMZ | Power: 2.000 kW | Voltage: 11.000 V | Frequency: 50 Hz | Speed: 989 rpm | Protection class: IP 54 | Cooling type: IC 611


Paper mill, Austria

After only four month of production, the EMZ was able to deliver two 1.000 kW turbo blower drives to an Austrian paper mill. The two identical motors are one-to-one interchangeable with the customer’s existing drives, so that installation could be carried out quickly and easily, without extensive reconstruction work on the foundation and switchgear. Due to the current Corona infection, EMZ service technicians accompanied the successful commissioning by phone. In advance, the motors were meticulously designed for the use on the high-speed-blowers.

This project shows once again that EMZ is a reliable and competent partner for fast and application-specific drive solutions of any kind.

Three-phase squirrel-cage rotor:

Make: EMZ | Power: 1.000 kW | Voltage: 6.000 V | Frequency: 50 Hz | Speed: 1.485 rpm | Protection class: IP 23 | Cooling type: IC 01


Cement plant, Germany

Already at the end of 2019, EMZ received an order to supply a reserve motor for a cement mill to a German cement plant. The high-voltage motor is designed for a voltage of 6.000V and a power of 4.400 kW in continuous operation and had to be 100% electrically and mechanically interchangeable with the existing machine in operation. With an exact measurement of the assembled machine and the determination of all necessary details in the system, we were able to realize this customer request. The design with a separate slip ring chamber, separated from the stator winding, also reduces contamination of the high-voltage winding and thus increases operational reliability. 

EMZ is pleased to have made another customer happy with a machine individually manufactured to his requirements!

Slip ring motor:

Power: 4.400 kW | Voltage: 6.000 V | Frequency: 50 Hz | Speed: 992 rpm | Protection class: IP 55 | Cooling type: IC 611


Chemical industry concern, Germany

After a breakdown of an compressor drive, the EMZ could find a replacement for an well-known chemical industry concern in a short time with an high-voltage motor in stock. In order to be able to install the 3250kW motor in the plant without customer modifications and to guarantee a continuous operation of at least 8.700 hours, the EMZ workshop team received various modifications for this project.

The necessary adjustments included converting the terminal box position from the right to the left side, changing the direction of rotation of the motor by replacing the external fan, supplying a central relubrication device with flow monitors, and installing active vibration sensors. The mechanical adaption was made by using a base frame specially made for this application, which was constructed at the customer’s request, including a complete static analysis based on the FEM calculations.

The assembly and the laser-assisted alignment of the high-voltage motor together with the base frame as well as the final commissioning of the drive was carried out to the complete satisfaction of our customer by the EMZ service team.

Compressor drive:

Design: B3 | Power: 3.250 kW | Voltage: 6.000 V | Speed: 1.489 rpm | Protection class: IP 55 | Cooling type: IC 611 | Weight: 8.450 kg


Cement plant, Algeria

The EMZ team delivered a replacement motor for a slip ring motor with plain bearings to a cement plant in Algeria. With the help of a base frame, the size and foot dimensions were adapted.

With the support of regional partners, the hydrostatic plain bearings for the oil plant were implemented in a timely manner. Subsequently, the plain bearing machine including the oil system was successfully tested in the internal EMZ test field.

Slip ring motor:

Make: EMZ | Power: 3.700 kW | Voltage: 5.500 V | Frequency: 50 Hz | Speed: 743 rpm | Protection class: IP 23 | Cooling type: IC 01


Cement plant, Cyprus

For a cement plant in Cyprus, EMZ supplied a 33-ton drive for a raw mill fan. Before the start of production, EMZ technicians on site provided detailed technical clarification. The task was to ensure both electrical and mechanical interchangeability with the existing ABB motor in size 900. The winding of the speed-controlled drive was additionally optimized for operation with an ABB ACS6000 frequency converter. The commissioning, as well as the optimization of the existing oil supply system for the flushing oil lubricated plain bearings, was carried out by the EMZ service team in September 2019.

Three-phase squirrel-cage rotor:

Power: 6.600 kW | Voltage: 3.100 V | Frequency: 50 Hz | Speed: 745 rpm | Protection class: IP 55 | Cooling type: IC 611 | Weight: 33.000 kg


Cement plant, Turkey

The modularly constructed slip ring rotor in size 1.000 mm is supplied together with a base frame and replaces an existing drive in size 1.500 mm. The delivery was 100% interchangeable, so that commissioning could be carried out in the shortest possible time without any modifications. Due to a breakdown of the motor to be replaced during the production phase, the delivery date had to be shortened by 14 weeks. Thanks to the excellently implemented special measures and the smooth production process, our EMZ service team was able to commission the 46.000 kg drive in June 2019 successfully. As this project for EMZ is the largest motor ever delivered, we can be doubly proud of ourselves for having delivered such a large engine in such a short time.

Slip ring motor:

Power: 10.380 kW | Voltage: 6.300 kV | Frequency: 50Hz | Speed: 994 rpm | Protection class: IP 54 | Cooling type: IC 611 | Weight: 46.000 kg

Recycling plant, France

EMZ modernized a shredder plant for metal scrap of a successful recycling company in the southwest of France. Following a comprehensive modernization of this plant, the shredder's rotor, which weighs more than 40 tons, will be driven by a ten-pole EMZ slip-ring motor in future. With a rated power of almost 3.000 kW, the new motor now delivers more reserves and thus increases productivity by up to 50 percent, depending on the materials, without the motor reaching its thermal limits.

Slip ring motor:

Power: 3.000 kW | Voltage: 5.500 V | Frequency: 50Hz | Speed: 595 rpm | Protection class: IP 24 | Cooling type: IC 11


Cement mill, Australia

Professional replacement of the complete drive train of a cement mill in Australia. The water-cooled EMZ slip-ring motor type ASW 630-06 was manufactured interchangeably to the existing Alstom machine and additionally equipped with a short-circuit and brush lifting device. In January 2019, the motor was successfully commissioned by the EMZ Service Team. During a 12-day shutdown, the complete drive train was changed on-site while fully adhering to all work and safety measures. The works concerning the drive train included the exchange of the main gearbox and the auxiliary drive supplied by SEW, the medium-voltage switchgear, a foundation adaptation using a solid adapter frame and the renewal of the medium-voltage and control cables.

Slip ring motor:

Power: 2.500 kW | Voltage: 6.600 V | Frequency: 50 Hz | Speed: 990 rpm | Protection class: IP 55 | Cooling type: IC 81 W


Cement mill drive, Morocco

EMZ was able to quote a slip-ring motor available from stock for this emergency. In order to ensure a fast installment without any major modification works in the mill, EMZ manufactured a fitting base frame which has the main dimensions of the original engine. Including all adjustments and modifications, the motor had been ready for shipment within 5 working days.

Slip ring motor:

Power: 5.300 kW | Voltage: 5.500 V | Frequency: 50 Hz | Speed: 993 rpm  | Protection class: IP 55 | Cooling type: IC 611


Steel mill, Egypt

EMZ manufactured an 8-pole high-voltage motor with 1,200 kW for a steel mill in Egypt. The engine replaces an Marelli drive that was over 40-year-old. It was important that the new motor had the same main mounting dimensions as the old motor. This advantage enabled a quick and cost-effective retrofitting of the installation. Furthermore, the technical data also had to be designed specifically for the mill application. In addition to "standard data" such as voltage and power, the overload capacity (in this case 1.8 times the nominal load) and the starting time were important issues. Finally, the engine was commissioned in June 2018 by the EMZ service team successfully.

Three-phase slip ring motor:

Make: EMZ | Power: 1.200 kW | Voltage: 6.000 V | Frequency: 50Hz | Speed: 742 rpm | Protection class: IP 23 | Cooling type: IC 06


Cement plant, Germany

On Saturday, February 3, 2015, a 1,000 kW motor failed due to winding damage at a cement plant in northern Germany. A short-term repair was impossible. The maintenance team of the cement plant contacted EMZ. Thanks to its extensive stock, including large machines, EMZ was able to offer the cement plant a suitable 1,350 kW motor. The motor was shipped on Sunday evening so that production could be resumed on Monday.

Squirrel cage motor:

Power: 1.350 kW | Voltage: 690 V | Frequency: 50 Hz | Speed: 1.479 rpm | Protection class: IP 55 | Cooling type: IC 611


Pump manufacturing, Germany

In September 2017, EMZ upgraded the test stand for a pump manufacturer from Germany with an individually modified 4,000 kW drive, thus doubling the test stand capacity. In the future, the machine factory will also be able to precisely measure the performance of its single- and multistage centrifugal pumps in large dimensions.

High-voltage slip-ring motor:

Make: ABB | Power: 4.000 kW | Voltage: 10.500 V | Frequency: 50 Hz | Speed: 1.488 rpm | Protection class: IP 54 | Cooling type: IC 81W


Cement plant, Turkey

In February 2015, EMZ France Sarl received a request for a short-term delivery of a 4,000 kW squirrel-cage motor for an application in a cement plant in Turkey. The motor had to be suitable for use on a medium-voltage frequency converter and be able to operate in the speed range from 100 to 1200 RPM as a drive for a furnace fan. Furthermore, the existing foundation dimensions had to be taken into account. After technical clarification with our customer, we selected a slip ring motor available in our stock and modified it for this application in our factory. For operation on the frequency converter, the rotor winding of the machine was short-circuited and the carbon brushes were removed. After a successful test field acceptance by the operator, the motor was delivered on schedule in mid-March 2015 and commissioned together with the frequency converter.

High-voltage slip-ring motor:

Power: 4.000 kW | Voltage: 6.000 V | Frequency: 5-60 Hz | Speed: 100 - 1.200 rpm  | Protection class: IP 55 | Cooling type: IC 611

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


Cement plant, Germany

The EMZ Service Team has commissioned a new slip ring motor as the drive for the new construction of a filter blower in a German cement plant. The delivery for this client included two 710 kW motors and the matching liquid starter.

 

Slip ring motor:

Make: EMZ | Power: 710 kW | Voltage: 6.000 V | Frequency: 50Hz | Speed: 992 rpm | Protection class IP 55 | Cooling type: IC 611


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.

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

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 facility, France

EMZ received an order to supply the complete drive unit of a 1,500 kW fan drive for a new bodyflying plant. The motor was delivered together with a suitable high-voltage soft starter and the complete switchgear. The bodyflying plant was installed in France and subsequently commissioned.

Squirrel cage motor:

Make: EMZ | Power: 1,500 kW | Voltage: 6,000 V | Speed: 990 rpm. | Safety class: IP55 | Weight: 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