Coolant; Definition Of Cooling Water - Siemens 6SE7087-8KN50 Instructions De Service

08.2008
11.1.3

Coolant

11.1.3.1

Definition of cooling water

NOTICE
WARNING
Siemens AG 6SE7087-7KN50
SIMOVERT MASTERDRIVES
Normal service water or a water-antifreeze mixture (see Section
"Antifreeze additive") can be used as coolant.
The cooling water must meet the following requirements in the long
term:
Max. grain size of any entrained particles
pH value
Chloride
Sulfate
Dissolved substances
Total hardness
Conductivity (water only, also see Section
"Antifreeze additive")
Cooling water inlet temperature
Cooling water temperature rise per unit (rated
operation)
Operating pressure
•
Type of construction E to G
•
Type of construction K
No operating pressures higher than 1.0 bar, or 2.5 bar (≥ type of
construction J), are permitted!
If the equipment is operating at a higher pressure, the pressure at each
unit is to be reduced to 1.0 bar, or 2.5 bar (in the case of type of
construction K).
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.
Operating Instructions
Technical Data
≤
0,1 mm
6.0 to 8.0
< 40 ppm
< 50 ppm
< 340 ppm
< 170 ppm
< 500 µS/cm
+ 5 ... 38 °C
∆ ≈
T 5 °C
≤
1.0 bar
≤
2.5 bar
11-15