Siemens 1FT7 Configuration Manual

Mechanical properties of the motors
3.2 Liquid cooling
1FT7 Synchronous Motors
54 Configuration Manual, (PFT7S) 01/2009, 6SN1197-0AD13-0BP2
Materials and components in the cooling circuit
The following table lists a wide variety of materials and components which may or may not
be used in a cooling circuit.
Table 3- 3 Materials and components of a cooling circuit
Material Used as Description
Zinc Pipes, valves and fittings Use is not permitted.
Brass Pipes, valves and fittings Can be used in closed circuits with inhibitor.
Copper Pipes, valves and fittings Can be used only in closed circuits with inhibitors in which
the heat sink and copper component are separated (e.g.
connection hose on units).
Common steel (e.g. St37) Pipes Permissible in closed circuits and semi-open circuits with
inhibitors or Antifrogen N, check for oxide formation,
inspection window recommended.
Cast steel, cast iron Pipes, motors Closed circuit and use of strainers and flushback filters.
Fe separator for stainless heat sink.
High-alloy steel, Group 1 (V2A) Pipes, valves and fittings Can be used for drinking or municipal water with a
chloride content up to <250 ppm, suitable according to
definition in Chapter "Coolant definition".
High-alloy steel, Group 2 (V4A) Pipes, valves and fittings Can be used for drinking or municipal water with a
chloride content up to <500 ppm, suitable according to
definition in Chapter "Coolant definition".
ABS (AcrylnitrileButadieneStyrene) Pipes, valves and fittings Suitable according to the definition in Chapter "Coolant
definition". Suitable for mixing with inhibitor and/or biocide
as well as Antifrogen N.
Installation comprising different
materials (mixed installation)
Pipes, valves and fittings Use is not permitted.
PVC Pipes, valves, fittings
and hoses
Use is not permitted.
Hoses Reduce the use of hoses to a minimum (device
connection). Must not be used as the main pipe for the
whole system. Recommendation: EPDM hoses with an
electrical resistance > 10
9
Ω (e.g. Semperflex FKD
supplied from Semperit or DEMITTEL; from PE/EPD,
supplied from Telle).
Gaskets Pipes, valves and fittings Use of Viton, AFM34, EPDM is recommended.
Hose connections Transition
Hose - pipe
Secure with clips conforming to DIN 2817, available e.g.
from Telle.
The following recommendation applies in order to achieve an optimum heatsink (housing)
lifetime:
● Closed cooling circuit made of stainless steel or ABS that dissipates heat to a cooling
system via a water-to-water heat exchanger.
● Cooling circuit pipes, fittings made of ABS, stainless steel (Nirosta) or common steel
(St37).

Siemens 1FT7 Specifications

General

Brand	Siemens
Model	1FT7
Category	Engine
Language	English