Ministerial Regulation Prescribing Highly Efficiency Variable Speed Drive, B.E. 2558 (2015)

Policy Details

The ministerial regulation covers a variable speed drive that is supplied to an AC electric motor. The scope includes 1. Applicable to one-phase or three-phase; 2. Applicable to an AC power supply with a frequency of 50 hertz or an increase or decrease from a frequency of 50 hertz by 5% and a rated voltage not exceeding 1,000 volts; 3. Harmonic quantity control shall be in accordance with IEC 61000-3-2 or IEC 61000-3-4 or equivalent standards; 4. It has a noise emission limit feature and the noise resistance complies with the IEC 61800-3 standard; 5. Withstand the sudden surge of current (surge) according to IEC 61800-3 standard; 6. Can be used with ambient temperature from 5 degrees Celsius; 7. Compatible with 85 percent relative humidity without condensation; and 8. It can be used in vibrating installation conditions as defined in IEC 61800-2.