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

Fan motors CF-CM-HE 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...

Copyright 2008 : MOTEURS LEROY-SOMER

Fan motors CF-CM-HE General information A1 - Quality assurance 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...

Fan motors CF-CM-HE General informationA2 - Standards and approvalsORGANiZATiON OF STANDARDS AUTHORiTiES International bodies ’LEROY' SOMBi

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 60034-1 Ratings and operating characteristics 60034-2 Determination of losses and efficiency 60034-5 Classification of degrees of protection 60034-6 Cooling methods 60034-7 Mounting arrangements and assembly layouts NFEN 60034-5...

List of standards quoted in this document Reference ’LEROY' SOMER

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

A4.1 - ELECTRiCiTY AND ELECTROMAGNETiSM parameters ’LEROY' SOMER

’LEROY' SOMER

A4.5 - MECHANiCS AND MOVEMENT parameters ’LEROY' SOMBi

A4.6 - MECHANiCAL FORMULAE Title Force F - m . y F in N A force F is the product of a mass m by an acceleration y Weight q - m . g G in N Moment m - F . r M in N.m The moment M of a force in relation to an axis is the product of that force multiplied by F in N the distance r from the point of application of F in relation to the axis. Power - Rotating p - m . & P in W Power P is the quantity of work yielded per unit of time M in N.m to in rad/s w = 2n N/60 where N is the speed of rotation in min-1 P in W F in N V in m/s V = linear velocity Acceleration...

A4.7 - ELECTRiCAL FORMULAE title Power required by m .w P in W ^ expresses the efficiency of the driven machine. the machine P = --A M in N.m M is the torque required by the driven machine. Power drawn by the p = J3 u I cosp P in W 9 phase angle by which the current lags or leads the voltage. 3-phase motor U in V U armature voltage. I in A I line current. Reactive power Q = J3 . U . I . sinp Q in VAR Reactive power q = J3 u2 q w U in V U = voltage at the capacitor terminals supplied by a bank C in p F C = capacitor capacitance of...

Fan motors CF-CM-HE General informationA4 - Units of measurement and standard formulaeA4.8 - AIR FLOW parameter Laws relating to proportional fans parameter Change in the rotation speed Change in the fan diameter N1: initial speed of rotation N2: final speed of rotation D1: initial fan diameter D2: second proportional fan diameter ’LEROY' SOMBi

Fan motors CF-CM-HE Environment B1 - Definition of “Index of protection“ (IP) Indices of protection of electrical equipment enclosures In accordance with IEC 60034-5 - EN 60034-5 (IP) - EN 50102 (IK) Protected against solid objects larger than 50 mm (e.g. accidental contact with the hand) Protected against solid objects larger than 12 mm (e.g. a finger) Protected against solid objects larger than 2.5 mm (e.g. tools, wires) Protected against solid objects larger than 1 mm (e.g. thin tools, small wires) Protected against dust (no deposits of harmful material) Protected against any dust...

B2.1 - OPERATING CONDITIONS According to IEC 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...

B3.1 - USING SPACE HEATERS B3.2 - USING D.C. INJECTION 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...

C1.1 - TABLE OF TERMINAL BOXES AND CABLE GLANDS FOR RATED SUPPLY VOLTAGE C1.2 - 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 or space heater), these must be connected on screw dominos with labelled wires. Recommended tightening torques for the nuts on the terminal blocks. ’LEROY' SOMBi