Siemens 1FT6031-4AK71-4AH0-Z Manual page 44

Motor Description
1.7 Cooling
Materials used in the cooling circuits
The anti-corrosion additives used should be harmonized with the cooling system
manufacturer - i.e. the materials of the motor cooler and the materials of the fittings and
cooling medium hoses listed in the Table.
Table 1-10
Motor type
1FT606⃞
1FT608⃞
1FT610⃞
1FT613⃞
1FT616⃞
Cooling medium and anti-corrosion protection
Notice
It is not permissible that ice forms in the cooling circuit, neither in operation nor during
storage.
The checking and change intervals for the cooling medium should be harmonized with the
companies supplying the anti-corrosion agent and the cooling system.
We recommend that an anti-corrosion agent is added to water as cooling-medium (e.g.
Antifrogen N from the Hoechst Company or Tyfocor from Tyforop Chemie GmbH, refer to the
Table below).
Observe the specifications of the anti-corrosion agent manufacturer regarding the ratio of
water to anti-corrosion agent.
For Tyfocor, the ratio of 75 % water and 25 % anti-corrosion agent should not be exceeded.
When using another cooling medium (e.g. oil, cooling-lubricating medium) de-rating may be
required in order that the thermal motor limit is not exceeded. The de-rating can be
determined using the following data:
Specific density:
Specific thermal capacitance:
Intake temperature:
Flow quantity:
The enquiry must be sent to the manufacturer's plant (Hotline).
The motor power still does not have to be reduced for oil-water mixtures with less than 10 %.
1-24
Materials used in the motor cooling circuit
Bearing end shield
Aluminum
Gray cast iron
Configuration Manual, (PFT6), Edition 12.2004, 6SN1197-0AD12-0BP0
Enclosure Sealing agent
Aluminum Terostat
Aluminum Terostat
ρ [kg/m ]
3
c [J/(kg K)]
p
t [°C]
v
v [l/min]
Connecting plate
Stainless steel
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1FT6 synchronous motors