Siemens SIMOTICS S-1FT7 User Manual

Mechanical properties
3.1 Cooling
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
47
To determine the derating, you need the following values of the coolant at a temperature of
30 °C:
Density
ρ / kg/m
3
Specific thermal capacitance
c
ρ
/ J/(kg•K)
Thermal conductivity
λ / W/(K•m)
Kinematic viscosity
ν / m
2
/s
Flow rate
V / l/min
The required derating can be obtained from Technical support.
Please send your enquiry to Technical support (https://support.industry.siemens.com
).
Biocide
The risk of corrosion caused by microbes is virtually non-existent in chlorinated drinking
water systems.
Closed cooling circuits with soft water are susceptible to microbes.
The following types of microbes are encountered in practice:
● Slime-forming bacteria
● Corrosive bacteria
● Iron-depositing bacteria
The suitability of a biocide depends on the type of microbe.
● Analyze the cooling water for microbes at least once a year.
Necessary biocides can be obtained from the manufacturer, e.g. Nalco. Ask the
manufacturer for compatibility with an inhibitor used in your system.
● Dose the biocide as recommended by the manufacturer.
Antifrogen N already acts like a biocide at the minimum concentration of > 20%.
Note
Compatibility of coolant additives
Biocides and Antifrogen N must not be mixed.
There are other manufacturers of chemical additives in the market. You can use equivalent
products from other manufacturers. Have the suitability of the third-party products
determined.

Siemens SIMOTICS S-1FT7 Specifications

General

Brand	Siemens
Model	SIMOTICS S-1FT7
Category	Engine
Language	English