TAM 00699 28
DSD2 045 – 132 04/2018
Three-phase synchronous motor English
9 Appendix 2: water-cooled machines
In addition to the previous chapters for water-cooled motors (EN 60034-6; IC 3W7) the following must be
considered complementary:
9.1 Definitions of power ratings for water-cooled machines
The power ratings (torques) mentioned in the technical product list apply to permanent operation S1 at
nominal speed, provided the cooling circuit requirements for water-cooled motors are met!
The reduction factors included in the table below must be considered when operating these motors with
higher coolant inlet temperatures:
Coolant inlet temperature
Percentage of list performance (torque)
Table 6: Reduction factors
9.2 Motor cooling
The cooling system of the water-cooled Motors is made of stainless steel or at the sizes 56 and 132 is
made of aluminum coated by cathodic dip-coating.
Both of the water connections (inlet and outlet) of the motors are standardly equipped at:
- Size 56 on the B side of the housing with cylindrically threaded holes G/4“.
- The sizes 71 and 100 on the B side of the housing with one smooth stainless steel pipe Ø8 x 1
without additional connection technology.
- Size 132 on the A side of the housing with cylindrically threaded holes G1/2“.
Wetted materials in the motor:
Aluminum coated by cathodic dip-coating at size 56; diversions are of galvanized steel or brass;
NBR seals
Size 71 and 100 are made of stainless steel.
Aluminum coated by cathodic dip coating at size 132, connections are of galvanized steel, NBR
seals
The cooling system for water-cooled DSD2 motors is made of stainless steel.
The two water connections (inlet and outlet) on the NDE are supplied as standard with a stainless steel
tube Ø8 x 1 without extra termination systems.
The coolant (in accordance with the coolant properties specified in Section 9.6) is permitted to contain
corrosion inhibitors and anti-bacterial additives. The type and volume of these additives is based on the
respective manufacturer’s recommendations and the prevailing ambient conditions.
The safety regulations for the product from the manufacturer of the corrosion inhibitors
and anti-bacterial additives must be observed.
Cooling lubricants employed in the manufacturing process are not allowed to be used
to cool the motor!
The filling operation of a closed cooling circuit filtering with regard to the harmful
deposits in the cooling channels or lines should supposed to be made by filtering at all
times (filter fineness <0.1 mm). When having open cooling circuits at all times a
filtering should be provided.
Note: The system manufacturer is responsible for the planning of the cooling circuit.
Condensed water must not be allowed to accumulate.
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