If other raw water specifications apply, titanium heat exchanger plates or tube bundle heat
exchangers are available (optional).
NOTICE
Deposits of suspended solids
If you reduce the flow rate to reduce the raw water usage, then deposits of suspended solids
can build up in the heat exchanger as a result of the slow flow rate.
These suspended solids can then cause the cooling system to fail. The drive could be
damaged.
Only reduce the raw water flow rate if the raw water does not have any suspended solids.
Raw water requirements
Table 3-2 Raw water requirements
Value
Size of entrained particles < 0.5 mm
pH value 6.5 to 8.0
Carbonate hardness < 0.9 mMol/l (5 °dH)
Total hardness < 1.7 mMol/l (9.5 °dH)
Chloride 60 mg/l
Sulfate 80 mg/l
Nitrate 10 mg/l
Core 0.2 mg/l
Ammonia 10 mg/l
Dissolved solids <3.4 mMol/l (340 ppm)
Where values deviate from the above stated, a water analysis should be carried out in order to
ensure the long-term stability of the heat exchanger.
3.8 Components
3.8.1 Power cell
A power cell comprises the following mechanical units that can be separated:
● IGBT module
● Capacitor bank
Description
3.8 Components
SINAMICS PERFECT HARMONY GH150 6SL38253AE412AA1-Z
Operating Instructions Rev.201910281231 EXAMPLE 37
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