Technical data

Coolant
Only MSK motors with the option ”FN” are allowed to be operated via an ex-
ternal connected cooling system.
The heat of the transformed motor power loss P
V
is dissipated using the cooling
system. MSK motors may only be operated if the coolant supply is ensured.
The cooling system must be rated by the machine manufacturer in such a way
that all requirements regarding flow, pressure, purity, temperature gradient etc.
are maintained in every operating state.
CAUTION
Impairment or loss of motor, machine or cooling system!
⇒ Heed the manufacturer’s instructions when constructing and operating
cooling systems.
⇒ Do not use any lubricants or cutting materials from operating processes.
All information and technical data are based on water as the coolant. If other
coolants are used, these data no longer apply and must be recalculated.
A cooling with floating water from the supply network is not recommended.
Calcareous water can cause deposits or corrosion and damage the motor and
the cooling system.
For corrosion protection and for chemical stabilization, the cooling water must
have an additional additive which is suitable for mixed-installations with the
materials acc. to chapter " Coolant " on page 172).
The utilization of aggressive coolants, additives, or cooling lubricants can cause
irreparable motor damages.
● Use systems with a closed circulation and a fine filter ≤ 100 µm.
● Heed the environmental protection and waste disposal instructions at the
place of installation when selecting the coolant.
Aqueous solutions ensure reliable corrosion protection without significant
changes of the physical property of the water. The recommended additives
contain no materials harmful to water.
Corrosion protection oils for coolant systems contain emulsifiers which ensure
a fine distribution of the oil in the water. The oily components of the emulsion
protect the metal surfaces of the coolant duct against corrosion and cavitation.
Herewith, an oil content of 0.5 – 2 volume percent has proved itself.
Does the corrosion protection oil compared with the corrosion protection has
also the coolant pumping lubricant, then the oil content of 5 volume percent is
necessary.
● Heed the instructions of the pumping manufacturer!
Example for coolant additives:
Description Manufacturer
1%...3%-Solutions
Aquaplus 22 Petrofer, Hildesheim
Varidos 1+1 Schilling Chemie, Freiburg
33%-Solutions
Glycoshell Deutsche Shell Chemie GmbH, Eschborn
Tyfocor L Tyforop Chemie GmbH, Hamburg
OZO antifreeze Deutsche Total GmbH, Düsseldorf
Aqueous solution
Emulsion with Corrosion Protection
Coolant additive
172/194 Bosch Rexroth AG | Electric Drives
and Controls
Rexroth IndraDyn S | Project Planning Manual
Operating Conditions and Application Notes