Can we use OKKEN for tropical conditions? What is necessary to add to standard specification in this case for configuration with drawers?

It's not necessary to add something. Just use standard Okken.
But regarding circuit-breakers, apparatus... you have to use spécial devices for tropical atmosphère.
If there is damp, humidity, we suggest to use IP54 cubicle.

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Legacy KB System (APS) Data: RESL188506 V2.0, Originally authored by PhBr on 10/17/2007, Last Edited by GwPo on 07/23/2010
Related ranges: Okken