05.2006 Technical Data
Siemens AG 6SE7087-2JD60
SIMOVERT MASTERDRIVES Operating Instructions 13-17
13.1.3 Coolant
Normal service water or a water-antifreeze mixture (see Section
"Antifreeze additive") can be used as coolant.
13.1.3.1 Definition of cooling water
The cooling water must meet the following requirements in the long
term:
Max. grain size of any entrained particles ≤ 0.1 mm
pH value 6.0 to 8.0
Chloride < 40 ppm
Sulfate < 50 ppm
Dissolved substances < 340 ppm
Total hardness < 170 ppm
Conductivity (water only, also see Section
"Antifreeze additive")
< 500 µS/cm
Cooling water inlet temperature + 5 ... 38 °C
Cooling water temperature rise per unit (rated
operation)
∆ T ≈ 5 °C
Operating pressure 1 bar
Operating pressures higher than 1 bar are not permissible!
If the system is operating at a higher pressure, the supply pressure
must be reduced to 1 bar at each unit.
The heat sink material is not seawater-proof, i.e. it must not be cooled
directly with seawater!
Filters (sieves) with a mesh size of < 100 µm are to be fitted in the unit
water
systems (see Section “Notes regarding installation and components”)!
If there is a risk of freezing, appropriate counter-measures should be
taken for operation, storage and transport, e.g. draining and blowing out
with air, extra heaters, etc.
The warning notes for "standard units" apply.
Installation and servicing work on the water systems must always be
performed with the electric power disconnected.
NOTICE
WARNING
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