Three Phase Explosion Proof ( Flameproof ) Asynchronous Motor, YB2 Motor Approved CE and EXD1. Specifications & Features: Rated voltage: 380V, 660V, 380V/660V, Rated frequency: 50Hz Duty: Continuous (S1). Insulation class: F Protection degree: IP55 Cooling method: ICO141 (cooled by SELF-FAN) Connection: Star-connection for 3KW or less while delta-connection for 4KW or more. Operating Conditions: 1.Ambient temperature should not be more than 40. 2.Altitude: not exceeding 1000meters above sea level. 3.Relative humidity should be less than 90%. Available type Frame H63 to 335, 2/4/6/8 poles, Rated output: 0.12KW-315KW B3/B5//B35 mounting; mounting dimensions according to IEC60034 standard.c