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3. o)<br />

High efficiency<br />

three-phase motors<br />

(MTEF2)<br />

The CEMEP (European organisation of motor manufacturers) and the European Commission have agreed to a join<br />

classification system for motor efficiency. Three different decreasing levels have been identified indeed: from the<br />

highest eff1, eff2 to eff3. To contribute to energy saving, CEG has designed MTEF2 motor family that complies with<br />

eff2 efficiency class.<br />

PRODUCTION STANDARDS for THREE-PHASE MOTORS<br />

Mounting arrangement IMB3<br />

Terminal box position On top (BS)<br />

Rated voltage 230/400V 50/60 Hz<br />

Protection rating IP55<br />

Bearings ZZ<br />

Winding insulation Class F<br />

Terminal box type 2 aluminium components (box + cover)<br />

End-shields assembly Bosses and bolts<br />

Paint finish BLUE RAL 5010<br />

Fan cover Galvanized steel sheet<br />

Duty S1<br />

Meaning of the symbol<br />

Pn = rated power Ms = locked-rotor torque<br />

n = rated speed Mm = breakdown torque<br />

In = rated current J = moment of inertia<br />

Is = locked-rotor current Cos ϕ = power factor<br />

Mn = rated torque η = efficiency<br />

89

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