Configuration Manual Synchronous Motors 1FT6 - Siemens ...

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 Materials used in the motor cooling circuit
Motor type Bearing end shield Enclosure Sealing agent Connecting plate
1FT606⃞
1FT608⃞
1FT610⃞
1FT613⃞
1FT616⃞
Aluminum
Cooling medium and anti-corrosion protection
Notice
Aluminum
Terostat
Stainless steel
Gray cast iron Aluminum Terostat –––
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: ρ [kg/m 3 ]
Specific thermal capacitance: cp [J/(kg K)]
Intake temperature: tv [°C]
Flow quantity: v [l/min]
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 %.
1FT6 synchronous motors
1-24 Configuration Manual, (PFT6), Edition 12.2004, 6SN1197-0AD12-0BP0