This series motors are designed and manufactured according to the Standards:
GB3836.1-2000, GB3836.2-2000, 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.

Operating Conditions
1. Ambient temperature: -20centi degree to 40centi degree
2. Altitude: Altitude should be lower than 1000meters above sea level.
3. Rated voltage: 380V, 660V, 380V/660V
4. Rated frequency: 50Hz
5. Connection: Star-connection for 3kw or less whereas delta-connection for 4kw or more.
6. Duty/Rating: Continuous(S1)
7. Insulation class: F, the temperature rise of the stator wining is examined at 80K(by resistance method).
8. Protection class: The main body of the motor is lp55, but the cooling method: IC411.