Maintenance intervals
As a general rule, the quality of the coolant should be checked at intervals of two years.
This can be done by distributors of Antifrogen® L (see www.clariant.com) if a 250 milliliter
sample is provided.
Technical data
￭ Coolant specification
Coolant type
Antifrogen® L (by Clariant International Ltd, www.clariant.com), mixed with water.
Ready-mixed coolant is available from Clariant distributors and ABB Service representatives.
The standard Antifrogen® L / water solution of 25/75% (volume) is usable down to a storage
temperature of -16 °C (3.2 °F). 50/50% coolant is optionally available for storage temperatures
down to -40 °C (-40 °F). Note that operation below 0 °C (32 °F) is not allowed regardless
of the freezing point of the coolant.
WARNING!
The warranty does not cover damage occurring from use of improper 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. An operating pressure of more than
150 kPa is required for sufficient flow.
The nominal current ratings of drive system modules apply to an Antifrogen® L / water
solution of 25/75% (volume). For derating with other ratios, contact your local ABB
representative.
Incoming coolant temperature:
• 4…40 °C (39…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 be derated by
6 percentage points per 1 °C (1.8 °F) temperature increase, as shown by curve (c).
• If there are no components with a maximum operating temperature of 55 °C (131
°F) installed in the same space as the drive modules, drive output current must be
derated by 2 percentage points per 1 °C (1.8 °F) temperature increase, as shown
by curve (b).
The drawing below shows the derating factor (k) in relation to coolant temperature.
Internal cooling circuit 147
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