Protection against condensation

With liquid-cooled units, warm air can condense on the cold surfaces of the pipes and heat sink. This condensation depends on the air humidity and the temperature difference between the ambient air and the coolant. The higher the humidity level, the smaller the temperature difference at which condensate will form. The water which is produced as a result of condensation can cause corrosion as well as electrical damage such as creepage shorts and flashovers. The solenoid valve (-Y1) integrated in the converter regulates the coolant temperature according to the temperature of the ambient air and thus effectively protects the unit against condensation.

Closed cooling circuit for a SINAMICS G180 liquid-cooled converter

The following diagram shows a typical example of a closed cooling circuit with an explanation of all the main cooling circuit components.

SINAMICS G180 liquid-cooled cabinet unit – recommended layout for a closed cooling circuit

Open cooling circuit for a SINAMICS G180 liquid-cooled converter

The following diagram shows a typical example of an open cooling circuit with an explanation of all the main cooling circuit components.

SINAMICS G180 liquid-cooled cabinet unit – recommended layout for an open cooling circuit