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LOW-VOLTAGE INDUCTION MOTORS

Low-voltage motors are squirrel-cage motors with three-phase power supply ranging from 200 V to 690 V, covering a power spectrum from 0.06 kW to 1,250 kW.
They are made with several different fixed rotation speeds, and can optionally be fitted with continuous speed control via a frequency inverter and/or their speed can be reduced using different types of mechanical gearboxes.


How efficient are electric motors?

As part of the European Union’s efforts to reduce the environmental burden posed by industrial and domestic applications, specific requirements for the energy efficiency of electric motors have been introduced throughout the EU.
These requirements are defined by EU Directive EU 2009/125/EC and the technical standard IEC/EN 60034. Electric motors are currently available at four levels of efficiency:


    IE1 (standard or low efficiency)
    Banned in the EU and in many non-EU countries.


    IE2 (high efficiency)
    Banned in the EU. A motor used in conjunction with a frequency inverter is exempt.


    IE3 (premium efficiency)
    Unrestricted in the EU and most countries around the world (some countries, however, require compliance with specific local standards, such as NEMA efficiency in NAFTA markets).


    IE4 (super premium efficiency)
    Unrestricted in the EU and most countries around the world (some countries, however, require compliance with specific local standards, such as NEMA efficiency in NAFTA markets).


    Unclassified: low or standard efficiency
    The EU allows the use of low-efficiency engines with no IE classification in certain cases, such as motors for very high or low temperatures, brake motors, multi-speed motors with a power output of over 375 kW, etc.






    Complete catalogues of low-voltage electric motors in many world languages

    can be found on the Siemens website.

    more information here




    Low-voltage squirrel-cage motors overview

    SIMOTICS GP (General Purpose)


    Electric motors with an aluminium frame

    The most popular design of electric motor for all types of conventional applications, for general use in a safe (explosion-free or ignition-free) environment, in a variety of industrial and domestic applications (conveyors, hoists, blowers, simple machine tools, pumps, fans, etc.).
    Available in sizes 63-200.



    Pros:

    • lowest price
    • excellent power-to-weight ratio
    • broad configuration options
      • installation of modular superstructures (electromagnetic brakes, ventilation units, IR, thermal protection, etc.)
      • various mechanical designs (possible modifications of the shaft shape, various positions of the terminal boxes, various bearing designs, etc.)
    • standardised dimensions to ensure compatibility with other brands’ products
    • also available in higher power version
    • excellent availability (the most common power levels are in stock)


    Cons:

    • lower durability
    • unsuitable for a demanding environment
    • available only up to an axial height of 200 (max. 37 kW)






    SIMOTICS SD (Severe Duty)

    Electric motors with a cast-iron frame

    The most popular design of squirrel-cage induction motors in cast-iron housing for demanding use in a safe (explosion-free or ignition-free) environment, in a variety of industrial applications (such as conveyors, hoists, blowers, simple machine tools, pumps, fans, etc.). 
    Available in sizes 71-315.

    Cast-iron motors produced by Siemens are split into two categories:

    • Standard Line
      • 1LE15/1LE55 series electric motors with basic equipment (standard bearings, plastic fan cover, standard paint, etc.)
      • 12-month guarantee
    • Performance Line
      • 1LE16/1LE56 series electric motors with premium equipment: reinforced bearings with lubrication in most sizes, thicker and more durable paint, metal fan cover, anti-condensation holes with special valve, 3 x PTC winding thermal protection in the price
      • 36-month guarantee

    Pros:

    • broad configuration options
      • installation of modular superstructures (electromagnetic brakes, ventilation units, IR, thermal protection, etc.)
      • various mechanical designs (possible modifications of the shaft shape, various positions of the terminal boxes, various bearing designs, etc.)
    • high durability, suitable for demanding working conditions
    • extended guarantee period for the 1LE16/1LE56 series
    • available up to 500 kW (this will rise further in the future)
    • also available in a higher power version
    • can be purchased and configured in our e-shop

    Cons:

    • more expensive
    • heavier

    Low voltage squirrel-cage motors overview







    SIMOTICS XP

    Explosion-proof and ignition-proof electric motors

    Simotics XP motors are electric motors for use in an environment where there is a risk that combustible vapours and gases will explode or that flammable dust will be ignited.
    Power output from 0.06 to 500 kW.

    Includes versions for the following conditions:

    • 2G - Zone 1 (Gb)
      A zone where explosive vapours and gases occasionally occur
    • 3G - Zone 2 (Gc)
      A zone where explosive vapours and gases are not present in normal operation, but if any such occurrence does happen, it is rare and short-term
    • 2D - Zone 21 (Db)
      A zone where a cloud of flammable dust (including conductive dust) occasionally occurs
    • 3D - Zone 22 (Dc)
      A zone where flammable dust is not present in normal operation, but if any such occurrence does happen, it is rare and short-term

    Versions for Zone 0 (permanent occurrence of explosive gases) and Zone 20 (permanent occurrence of flammable dust) are not available..

    Optionally, we also offer special explosion-proof motor designs (e.g. versions for mining operations).



    General features:

    • if the power is supplied from an inverter, a special motor configuration and certified winding thermal protection are required
    • limited configuration options
      • limited modular superstructure variability compared to standard motors
      • limited opportunity for increased ambient temperatures
    • ATEX certification for each motor
    • standardised dimensions to ensure compatibility with other brands’ products





    ELK MOTOR

    ELK Motor engines in aluminium or cast-iron housing

    • optional shape, voltage and frequency
    • various screw terminal positions (including fan swivel for all sizes)
    • option of brake extension, ventilation units and rotary sensors
    • multiple bearing configurations
    • option of varied temperature protection for the winding heating

    Other ELK Motor variants available

    • two-speed motors (on request)
    • motors with increased power – “compact” motors (on request)
    • special customised motors (mechanical adjustments and modifications for specific working environments)
    • unfortunately, this cannot be purchased in our e-shop, but we will be happy to draw up an offer for you

    contact support



    SIMOTICS TN

    Large low-voltage motors with a power output of 160 kW from an axial size of 315

    Electric motors for low-voltage applications requiring high performance. Encompasses, in particular, the 1LA8, 1PQ8, 1LL8 and derived series, and covers the power range from 160 to 1,250 kW.

    Key features:

    • available in different winding designs for power supply from the grid or an inverter
    • a number of modifications and mechanical adjustments are available
    • standardised dimensions to ensure compatibility with other brands’ products
    • unfortunately, this cannot be purchased in our e-shop, but we will be happy to draw up an offer for you

    contact support

    Electric motors for low-voltage applications requiring high performance. Encompasses, in particular, the 1LA8, 1PQ8, 1LL8 and derived series, and covers the power range from 160 to 1,250 kW.

    Key features:

    • available in different winding designs for power supply from the grid or an inverter
    • a number of modifications and mechanical adjustments are available
    • standardised dimensions to ensure compatibility with other brands’ products
    • unfortunately, this cannot be purchased in our e-shop, but we will be happy to draw up an offer for you

    contact support

    Electric motors for low-voltage applications requiring high performance. Encompasses, in particular, the 1LA8, 1PQ8, 1LL8 and derived series, and covers the power range from 160 to 1,250 kW.

    Key features:

    • available in different winding designs for power supply from the grid or an inverter
    • a number of modifications and mechanical adjustments are available
    • standardised dimensions to ensure compatibility with other brands’ products
    • unfortunately, this cannot be purchased in our e-shop, but we will be happy to draw up an offer for you

    contact support



    SIMOTICS FD (Flexible Duty)

    New-design low-voltage motors for power supply via an inverter with output from 200 to 1,600 kW

    Electric motors for VSD (variable speed drives) low-voltage applications requiring high performance.

    Key features:

    • available in various cooling designs – IC411, IC416, IC71W, IC86W, IC01, IC06
    • excellent power-to-size ratio
    • optimised for operation with a Siemens Sinamics inverter
    • in IP23, IP55, IP56, IP65 housing
    • unfortunately, this cannot be purchased in our e-shop, but we will be happy to draw up an offer for you

    contact support






    Single-phase induction motors

    Electric motors for standard applications or an “emergency” choice if a three-phase power supply is not available

    Encompasses the 1LF7 series and power output up to 3 kW and the new line of D2Drives K1SA single-phase motors.

    Key features:

    • design with a run capacitor for easy starts
    • design with a run and start capacitor for more difficult starts
    • the possibility of installing thermal protection, but other configurations only to a very limited extent
    • a limited range of mechanical adjustments is available
      • different types of bearings, various terminal block positions, shaft shape modifications, etc.
    • can be purchased online in our e-shop




    Did you know...?


    Our company stocks are among the best anywhere in the Czech Republic.

    Our warehouses have permanent stocks of popular motors and a wide range of modular superstructures, accessories and spare parts for fast customisation. 

    More than 70% of all orders received are dispatched within 3 days. This is a policy we have long kept to.