Certification of inverter-fed induction motors for use in hazardous areas

The use of variable speed drive motors fed from static frequency converters is increasing generally by approximately 30% per annum. To facilitate their use in hazardous areas, a thorough study is required of the appropriate safety requirements so that relevant safety standards can be updated and acceptable and convenient procedures developed. The authors present a certification of invertor-fed induction motors for use in hazardous areas