
with forced air-cooling

with closed circuit water-cooling.
The water-cooled version offers the following advantages:

low noise: no fans, therefore no need for acoustic insulation

high protection degree (useful for dusty or wet environments)

smaller size at the same power

the heat is conveyed out of the switchboard and the premises: there is no need for any conditioning

the heated cooling water can be used as a free source of heat for "process heat", heating or industrial
water.