Connection Methods - Siemens Sinamics S120 Manual

Cooling circuit, coolant properties and protection against condensation

9.6 Connection methods

Examples of the coolant temperature setpoint depending on the ambient temperature
This method is based on a high humidity (95%). The advantage is that only the ambient
temperature and the coolant temperature are required as actual values for the coolant
temperature control. A sensor for the humidity is not required.
③
④
Figure 9-23
The temperature difference ΔT
humidity up to 95%.
SIEMENS cooling units
Cooling units with a cooling capacity of 32, 48, 72 and 110 kW can be ordered from SIEMENS.
Please contact your local Siemens office.
The cooling units in a Siemens control cabinet have a closed-control unit with a bypass valve
as protection against condensation. The risk of condensation can be minimized by manually
setting the coolant temperature using the Siemens control. Recognition of the danger of
condensation due to too high an ambient temperature in relation to the coolant temperature
is integrated as a warning to be issued.
9.6 Connection methods
The electrical connections on the SINAMICS S120 liquid-cooled devices must be made with
cables of the cross-section stipulated in the technical data for the relevant device.
The coolant connection is made using 3/4'' couplings.
The supply and return connections on the SINAMICS devices must be made with flexible,
non-conductive hose (see Section "Materials") so as to eliminate the risk of electrochemical
corrosion, to reduce transfer of vibration and to dampen pressure transients in the coolant.
The hose should be about 1.5 m in length (total of supply and return lines).
The coolant hoses should be connected before the devices are mounted.
344
Actual ambient temperature value
Adder for temperatures
Formation of the setpoint depending on the ambient temperature
should be 3° C. Condensation is therefore excluded for a
L
Liquid-cooled chassis power units
Manual, (GH7), 11/2016, 6SL3097-4AM00-0BP7