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156 Internal cooling circuit
Technical data
Coolant specification
￭
Coolant type
Antifrogen® L (by Clariant International Ltd, www.clariant.com) 25% or 50% mixture,
available from Clariant distributors and ABB Service representatives.
Note: Do not dilute the coolant. It is ready to use.
Antifrogen® L 25% mixture is usable in storage temperatures down to -16 °C (3.2 °F).
Antifrogen® L 50% mixture is usable in storage temperatures down to -40 °C (-40 °F).
Note that operation below 0 °C (32 °F) is not permitted regardless of the freezing
point of the coolant.
WARNING!
The warranty does not cover damage that occurs from the use of incorrect
coolant.
Temperature limits
￭
Ambient temperature: See the technical data of the drive/unit.
Freeze protection: The freezing point of the coolant is determined by the concentration
of heat transfer fluid in the mixture.
The higher the concentration of heat transfer fluid, the higher the viscosity of the
coolant. This results in a higher pressure loss in the system. See
limits (page
158).
The nominal current ratings of drive system modules apply to an Antifrogen® L / water
solution of 25/75% (volume). With the Antifrogen® L concentration between 25% and
50%, the drive output current must be derated by 1/3 percentage point per 1 p.p.
increase in Antifrogen® L concentration. The drawing below shows the derating factor
(k) in relation to Antifrogen® L concentration.
k
1.00
0.95
0.90
25%
30%
35%
Incoming coolant temperature:
•
0...40 °C (32...104 °F): no drive output current derating required
•
40...45 °C (104...113 °F): drive output current must be derated by 2 percentage
points per 1 °C (1.8 °F) temperature increase, as shown by curve (a).
•
45...50 °C (113...122 °F):
•
If components with a maximum operating temperature of 55 °C (131 °F) are
installed in the same space as the drive modules, drive output current must
40%
45%
50% Antifrogen® L concentration
Pressure
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