Siemens SIMOTICS Series Hardware Installation Manual

Motor components, characteristics and options
4.2 Cooling
SIMOTICS M-1FE2 built-in motors
66 Hardware Installation Manual, 04/2020, A5E50074509B AA
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 4- 6 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 inhibi-
tors or Antifrogen N, check for oxide formation, inspection win-
dow recommended.
Cast steel, cast iron Pipes, motors Closed circuit and use of strainers and flushback filters. Fe sepa-
rator 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 con-
tent 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 con-
tent up to <500 ppm, suitable according to definition in Chapter
"Coolant definition".
ABS (
A
crylnitrile
B
utadiene
S
tyrene) Pipes, valves and
fittings
Suitable according to the definition in Chapter "Coolant defini-
tion". 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 The use of hoses should be reduced to a minimum (connecting
equipment) and must not be used as the main supply line for the
complete system.
Recommendation: EPDM hoses with an electrical re-
sistance > 10
9
Ω (e.g. Semperflex FKD supplied from Semperit
or DEMITTEL; from PE/EPD, supplied from Telle).
Gaskets Pipes, valves and
fittings
The use of FKM, AFM34, EPDM is recommended.
Hose connections Transition
Pipe - hose
Secure with clips conforming to DIN 2817, available e.g. from the
Telle company.
The following recommendation applies in order to achieve an optimum motor heatsink
(enclosure) lifetime:
● Construct a closed cooling circuit with the cooling unit using stainless steel technology.
The cooling circuit dissipates the heat via a water-water heat exchanger.
● Use for all other components, such as cooling circuit pipes and fittings manufactured of
ABS, stainless steel or general construction steel.

Siemens SIMOTICS Series Specifications

General

Product brand name	SIEMENS
Product designation	SIMOTICS
Efficiency Class	IE1, IE2, IE3, IE4
Ambient Temperature	+60°C
Altitude	Up to 4000 m
Frame Size	63 to 355
Protection Class	IP55, IP56, IP65