EXPLOSION PROTECTED 3-PHASE INDUCTION MOTORS
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EXPLOSION PROTECTED According to the ATEX Directive 2014/34/EU and new EU minimum efficiency regulation 2019/1781 & 2021/341 ATEX – FLAMEPROOF MOTORS PROFESSIONAL DRIVING INTO YOUR MORE ENERGY PROFESSIONAL SERVICE ENERGY GLOBAL IDEA TURNED INTO ENERGY BUSINESS GLOBAL DEVELOP CHALLENGING PROJECTS INDIVIDUAL PROF MORE ENERGY Product Catalogue

Product range LOW VOLTAGE GENERAL PURPOSE 3-PHASE INDUCTION MOTORS Three-phase motors with squirrel-cage rotor series (2)Sg(m), Sh. GENERAL PURPOSE 1-PHASE INDUCTION MOTORS HIGH VOLTAGE INDUCTION MOTORS UP TO 11kV for general purpose applications like pumps, fans, compressors; complying with the newest efficiency requirements Single-phase motors with squirrel-cage rotor series SEh(R), SEMh(R). – motors with standard starting torque – motors with increased starting torque – motors with high starting torque. for general purpose applications like pumps, fans, compressors, woodworking machines,...

EXPLOSION PROTECTED 3-PHASE INDUCTION MOTORS Efficiency of motors New efficiency classes for the low-voltage three-phase motors (IE = International Efficiency). Along with the international discussion on energy efficiency a worldwide harmonized energy efficiency standard classification system has been established for low-voltage three-phase asynchronous motors. For many years low-voltage three-phase motors in the European Union have been sold in three efficiency classes EFF3, EFF2 and EFF1 (CEMEP classification). Aside from this, many different efficiency classification systems have been...

The Commission Regulation (EC) No 2019/1781 & 2021/341 describes efficiency requirements which have been implemented on 2021-07-01 and which will come into force on 2023-07-01. The required efficiency class of three phase induction motors has to be as follows: Explosion protected motors except motors dedicated for underground mining Required efficiency class of three phase induction motors General purpose motors Cantoni Group pursuing a policy of continuous development of its products, back in the past already took actions to extend offer of high efficiency motors including also...

EXPLOSION PROTECTED 3-PHASE INDUCTION MOTORS Ratings – Tolerances Tolerances of motor parameters Permissible deviations between catalogue values and real values are according to the IEC 60034-1: Power factor cos φ Locked rotor current ratio IL/IN Locked rotor torque ratio TL/TN Breakdown torque ratio TB/TN Sound pressure level LpA [dB] Tolerances of supply voltage value and frequency Motors comply in standard with voltage value and voltage frequency variations within zone A according to the IEC 60034-1: Voltage value U Other extended tolerances of supply voltage and their frequency are...

Insulation classification The insulation system of an electric motor is determined by a given insulation class on the basis of its thermal resistance. This thermal resistance should be guaranteed by the entire set of electric insulating materials used in the motor insulating system. Thermal resistance classification is related to the temperature of the hotspot in the insulation occurring during rated operating conditions of the electric motor, allowing for the highest permissible rise in average temperature. This rise should be selected so that at the highest permissible ambient...

EXPLOSION PROTECTED 3-PHASE INDUCTION MOTORS Hazardous Area Classification Hazardous areas include any area in which explosive atmosphere may occur under specific conditions. An explosive atmosphere is a mixture of dangerous substances with air, under atmospheric conditions, in the form of gases, vapours, mist or dust in which, after ignition has occurred, combustion spreads to the entire unburned mixture. Potentially explosive atmospheres are classified according to the Zone system (defined in European directive 1999/92/EC) on the basis of the frequency and duration of the occurrence of an...

Gas and dust subgroups Different explosive atmospheres (gases, vapours and dusts) have different properties like for example flame temperature, ignition energy, explosive limits, and molecular weight. These properties will determine the likelihood and severity of an explosion. Taking into consideration above, gases and dusts can be grouped in order to select the right equipment for explosive areas. Subgroup Typical substance Gases, Vapours and Mists Hydrogen, Acetylene Combustible flyings Combustible Dusts REMARK: Any equipment which is marked as IIC can be used in atmospheres that contain...

EXPLOSION PROTECTED 3-PHASE INDUCTION MOTORS Equipment groups, safety categories and level of protection Electrical equipments are divided into two groups according to ATEX Directive 2014/34/EU: – Group I: products are intended for use in the underground parts of mines and in those parts of surface installations of such mines that are likely to become endangered by firedamp and/or combustible dust – Group II: products are intended for use in other environments (other than mines) that are likely to become endangered by explosive atmospheres. Standard EN IEC 60079-0 defines additional...

The table below presents the safety level of the equipment according to EN IEC 60079-0 and ATEX Directive 2014/34/EU. EN IEC 60079-0 ATEX Directive 2014/34/EU Flammable substances Protection level very high I (mine) methan, coal dust very high very high REMARK: Equipment from higher category (higher protection level) can also be installed instead of equipment from lower category (with lower protection level) The table below lists the typical protection methods and basic concepts of protection used in electric motors according to ATEX Directive and EN / IEC standards. Increased safety No...

EXPLOSION PROTECTED 3-PHASE INDUCTION MOTORS Cooling Flameproof motors from Cantoni Group are equipped with standard IC411 cooling according to IEC 60034-6. Other cooling methods (for example motors with external/separate cooling) are available on request. IC code according to IEC 60034-6 – Enclosed machine – Surface cooled by natural convection and radiation – Without internal or external fan – Enclosed machine – Smooth or finned casing – External shaft-mounted fan – Often called TEFC motor – Enclosed machine – Smooth or finned casing – External motorized axial fan integrated with the...