Heat Exchanger Modules are used to dissipate the power loss from the converter. They comprise a deionized water circuit on the converter side and a raw water circuit on the plant side.

The hot deionized water in the circuit on the converter side passes through a maintenance-free circulating pump into the water/water plate-type heat exchanger. This is made of stainless steel and connected to the raw water circuit on the plant side. The deionized water is cooled there by the raw water of the outer circuit and flows back into the drive.

The closed converter-side deionized water circuit is filled with coolant in accordance with the requirements in section "Cooling circuit and coolant quality" and deaerated before commissioning. The pressure is maintained by means of an expansion chamber. Any residual air that arises in the circuit during operation is removed via automatic vents.

To avoid condensation at excessively low coolant temperatures, a three-way valve for controlling the coolant temperature is installed.

Heat Exchanger Modules are available for the following voltages and cooling power ratings:

Heat Exchanger Modules for other line voltages (up to 480 V or as of 500 V) and for 60 Hz are available on request.