The motors in the "increased safety" version offer a high degree of explosion protection but at the same time have a low weight and are complex.
The copper bar rotors used as standard allow starting and operating parameters to be optimized for each and every specific application. The steel version allows various bearing concepts, dimensions can be adapted and a wide range of instruments can be mounted.

3 versions are available:

The Vario Ex e series is surface cooled with flat ribs combined with a defined inner cooling circuit with internal shaft-mounted fans.
The J Ex e series from Loher have a modular cooling design featuring double flow inner cooling for a high power density and a homogeneous temperature distribution in the following versions:
Mounted air-water heat exchanger: The heat exchangers are available in a wide range of versions with single and double pipe versions.
Mounted air-air heat exchanger: The cooling pipes are manufactured out of galvanized steel; stainless steel versions are available for especially aggressive atmospheres.