What Are the Changes to Motors for Zone 2 Locations?

A Zone 2 location is where a presence of an explosive atmosphere occurs only by accident.

UK Engineers were familiar with motors certified for  Zone 2 locations originally  called “Type N” which became ExN and finally ExnA  under harmonized IEC Standards.

Ex-ec-low-voltage-motors-250

 

Now there is a change. IEC 60079-7 was recently  revised to issue 5 and this introduces a replacement for the ExnA motor called Ex ec – increased safety motor for Zone 2.   Like the motor it replaces, the Ex ec motor is non-sparking, surface temperature limited and is issued with guidance on selection when used with Drives.  The major change is that the terminal arrangement is of “e” construction.

ABB have a complete range of Ex ec motors, all of which are available from APDS, your local Authorized Value Provider.  We also stock Ex eb motors for a Zone 1 location which have replaced the Exe  motor.  Flameproof motors, Exd, also for Zone 1 – and more popular in the UK, remain unchanged and are also in stock available from APDS.

 

We stock a comprehensive range of ABB motors, visit our ABB motor product pages
or join our website live chat, and one of our customer support team will be able to assist you.

 

Useful reading: Motors and drives in potentially explosive atmospheres – What you need to know