YB2 Series Explosion-Proof Three Phase Induction Motor Application scope This series motors are designed and manufactured into explosion proof type and the explosion proof property conforms to China National Standards: GB3836.1-2000 Electrical Apparatus for Explosive Gas Atmospheres-General Requirements. GB3836.2-2000 Electrical Apparatus for Explosive Gas Atmospheres- Explosion proof Enclosure d and standards IEC79-1, BS4683 and EN50018. ExdI- safe for use in the non-mining surfaces of underground coal mines where the explosive mixtures of methane or coal-dust are present. ExdIIAT4 - safe for use in plants where the explosive mixtures of IIA Class, TI, T2, T3 or T4 are present. ExdIIBT4 - safe for use in plants where the explosive mixtures of IIB Class, TI, T2, T3 or T4 are present. ExdIICT4 - safe for use in plants where the explosive mixtures of IIC Class, TI, T2, T3 or T4 are present. 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 40NULL. 2.Altitude: not exceeding 1000meters above sea level. 3.Relative humidity should be less than 90%. Available type Frame H63 to 315, 2/4/6/8 poles, Rated output: 0.12KW-200KW B3/B5//B35 mounting; mounting dimensions according to IEC60034 standard.c