... 3) Central heigh YB2 series explosion-proof asynchronous motor (motors) Superseding the old generation of series YB, series YB2 flameproof three phase ... motors, are developed and manufactured by our company, this series motors are of remarkable features, such as compact construction ... d' And standards IEC79-1, BS4683 AND EN50018. The explosion protection marks aare ExdI, ExdIIAT4, ExdIIBT4, they are ...