Patent ID: 8424320

Claim:
A cooling and dehumidification system for a frequency converter arrangement, comprising: an air dehumidifier for positioning inside a frequency converter cabinet, the air dehumidifier including a surface to be cooled for condensing humidity thereon, and a first heat exchanger; a liquid station, for arrangement outside the frequency converter cabinet, the liquid station including, a cooling liquid circuit for circulating liquid including, sequentially in a downstream direction, a liquid pump, a second heat exchanger, and a valve, and a bypass circuit having an inlet arranged, downstream of the pump and upstream of the second heat exchanger, the bypass circuit including a heating resistor and having an outlet connected to the valve; a frequency converter cabinet circuit for passing through the frequency converter cabinet and having an outlet connected directly to the valve and an outlet connected to an inlet of the cooling liquid circuit; and a drying liquid circuit for passing through the first heat exchanger and, having an inlet connected to the cooling liquid circuit downstream of the second heat exchanger and upstream of the valve, and an outlet connected to the frequency converter cabinet circuit.