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Induction motors for axial fans
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Induction motors for axial fans - 1

INDUCTION MOTORS CF-CM-HE For axial fans Technical catalogue

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In this catalogue, LEROY-SOMER describes the CF - CM - HE induction motors dedicated to driving axial fans for industries such as: • Air conditioning/refrigeration: condensers, evaporators, cooling towers, etc. • Ventilation: air treatment chambers, exhaust fans, air heaters, etc. These motors in aluminium alloy housing have been designed to incorporate the latest European standards, and can satisfy most of the demands of these industries. These motors are the result of many years of research and development in collaboration with the main players in the profession. The selection table below...

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Copyright 2008: MOTEURS LEROY-SOMER

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Fan motors CF-CM-HE General information LEROY-SOMER's quality management system is based on: - Control of procedures right from the initial sales offering until delivery to the customer, including design, manufacturing start-up and production. - A total quality policy based on making continuous progress in improving operational procedures, involving all departments in the company in order to give customer satisfaction as regards delivery times, conformity and cost. - Indicators used to monitor procedure performance. - Corrective actions and advancements with tools such as FMECA, QFD, MAVP,...

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Fan motors CF-CM-HE General informationA2 - Standards and approvalsORGANIZATION OF STANDARDS AUTHORITIES International bodies

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Approvals Certain countries recommend or insist on approval from national organizations. Approved products must carry the recognized mark on their identification plates. Approvals for LEROY-SOMER motors (versions derived from standard construction): Country For approved specific products, see the relevant documents. International and national standard equivalents National standards International reference standards Title (summary) 60034-1 Ratings and operating characteristics 60034-2 Determination of losses and efficiency 60034-5 Classification of degrees of protection 60034-6 Cooling...

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A3 - Tolerance on main performance parameters Tolerances on electromechanical characteristics IEC 60034-1 specifies standard tolerances for electromechanical characteristics. Note: IEC 60034-1 does not specify tolerances for current - the tolerance is ± 10% in NEMA-MG1

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A4 - Units of measurement and standard formulae

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A4.7 - ELECTRICAL FORMULAE Title Starting current Rated current No-load current Starting torque* Run up torque Maximum breakdown torque Rated torque Rated speed Synchronous speed N (Speed) (Rated) NNNS (Synchronous) * Torque is the usual term for expressing the moment of a force.

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Fan motors CF-CM-HE General informationA4 - Units of measurement and standard formulaeA4.8 - AIR FLOW English name Laws relating to proportional fans Parameter N1: initial speed of rotation N2: final speed of rotation D1: initial fan diameter D2: second proportional fan diameter 'LEROT SOMER

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Test result: no damage from water projected onto the machine.

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B2.1 - OPERATING CONDITIONS According to I EC 60034-1, motors can operate in the following normal conditions • ambient temperature within the range -16 to +40°C • altitude less than 1000 m • atmospheric pressure: 1050 hPa (mbar) = (750 mm Hg) CF - CM - HE fan motors often operate outside the temperature limits fixed by standard IEC 600341, especially with condenser and exchanger applications. Leroy-Somer fan motors are designed to operate in an ambient temperature range of -30°C to +60°C. For different operating conditions, please contact us. Note: However, unless otherwise specified, the...

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B3.1 - USING SPACE HEATERS Severe climatic conditions, for example T amb < - 40°C, RH > 95%, may require the use of space heaters (fitted to the motor windings) which serve to maintain the average temperature of the motor, provide trouble-free starting, and eliminate problems caused by condensation (loss of insulation). The heater supply wires are brought out to a terminal block in the motor terminal box. The heaters must be switched off while the motor is running. An alternative to the use of space heaters is to inject direct current into two of the phases wired in series from a D.C....

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C1.1 - TABLE OF TERMINAL BOXES AND CABLE GLANDS FOR RATED SUPPLY VOLTAGE Cl.2 - TERMINAL BLOCKS The motors are fitted with a terminal block complying with standard NFC 51 120. If the motor is fitted with accessories (thermal protection orspace heater), these must be connected on screw dominos with labelled wires. Recommended tightening torques for the nuts on the terminal blocks. "LEROY" ISOMER

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All motors are supplied with a wiring diagram in the terminal box. The diagrams normally used are shown below. Single-speed three-phase motor Three-phase/two-speed motor using slip (Eg. CM29G) Three-phase/two-speed Dahlander motor For 400 V mains supply •LEROY' ISOMBl

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Three-phase/two-speed PAM motor For 400 V mains supply High speed Y connection (400 V) | LI | L2 | L3 o o o Single-speed motor for use on three-phase and/or single-phase supplies (Eg. HE22TP) 230 V three-phase supply A connection 400 V three-phase supply Y connection Cl.4 - EARTH TERMINAL This is situated on a boss inside the terminal box. Consisting of a threaded stud with a hexagonal nut or a TORX recessed head screw, it is used to connect cables with cross-sections at least as large as the cross-section of the phase conductors. It is indicated by the symbol 4* in the terminal box...

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C2.1 - FIXING CF - CM MOTORS The fixing arms can be used to support the motor and centre the propeller in its ferrule. We strongly recommend using the fixing holes closest to the motor shaft extension. CF22 motors are designed to be fixed with 2 screws per arm on 3 arms (120°) or 4 arms (90°), the other motors are designed to be fixed on 4 arms (90°) with a minimum of 2 screws per arm for the short CM29, 3 screws for the long CM29. Recommendation for tightening the arms The size of the locking screws depends on the thickness of the arm and the washers to be locked in place. II (Pmin + e) ^...

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