Motor components
3.2 Cooling
1FE1 synchronous built-in motors
38
Hardware Installation Manual, 12/2016, 610.43000.40b
Coolant specification
As coolant, use only water that complies with the "water specification for coolant".
Note
If possible, use deionized water with reduced conductivity (5 ... 10 μS/cm) as the coolant.
Table 3- 2
Coolant water specifications
Quality of the water used as coolant for motors with alumi-
num, stainless steel tubes + cast iron or steel jacket
Chloride ions
< 40 ppm, can be achieved by adding deionized water.
Sulfate ions
< 50 ppm
Nitrate ions
< 50 ppm
pH value
6 ... 9 (for aluminum 6 ... 8)
Electrical conductivity
< 500 μS/cm
Total hardness
< 170 ppm
Dissolved solids
< 340 ppm
Size of entrained particles
< 100 μm
Corrosion protection
0.2 to 0.25% inhibitor, Nalco TRAC100 (previously 0GE056)
Anti-freeze protection
When required, 20 -
30% Tyfocor
The values specified for the water as a coolant are the requirements for a closed cooling
circuit. Not all of the specified concentrations will occur in the water at the same time.
When necessary, contact your water utility for the values.
Note
Inhibitor is not required if a Tyfocor concen
tration > 20% is ensured.
Derating is not required for antifreeze protection components <
30%.
Using a different coolant
Other coolants (e.g. cooling-lubricating medium, water-
oil mixtures with 10% oil and higher)
can reduce the power of the motor.
Note
Power reduction when using a different coolant
Derating is required for water-
oil mixtures with more than 10% oil.
Measures for frost danger
If there is danger of frost, adopt frost protective measures for complete or preassembled
motor spindle units.
●
Replenish antifreeze for operation (see Table "Coolant water specifications").
