Explosion Proof motor , AC Motor, Squirrel Cage Motor, 3-phase Motor YB2 series explosion proof AC motor 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. 1. Ambinent tempertuer should not be more than 40 Centigrade 2. The elevation should not be exceed 1000 meters. 3. The relative humindity should not be more than 90%. 4. Rated Frequency: 50Hz 5. Rated voltage: 380V, 660V, 380V/660V 6. Operation mode is S1 7. Protection degree: IP55, Insulation class: F