Bosch rexroth MBT, Manual

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Environmental influences Unit Class 3K4
Temperature change rate °C/min 0.5
1 ) Rexroth allows 0 °C for non-liquid-cooled motors.
Tab. 9-3: Classification of climatic environmental conditions according to DIN
EN 60721-3-3, Table 1
9.3 Degree of protection
The degree of protection is indicated by IP (International Protection) and two
digits. The first code number describes the degree of protection against con‐
tact and penetration of foreign substances; the second code number de‐
scribes the degree of protection against ingress of water.
Protection class IP00 applies to the stator (MST) and the rotor (MRT) accord‐
ing to DIN EN 60034-5. The applicability of the motor under specific condi‐
tions has to be checked thoroughly.
Refer to the following list (the list is not exhaustive).
Problem areas ● Use of the motor in a damp environment, in a foggy atmosphere.
● Use of coolants, aggressive materials or other liquids.
● Cleaning procedures under high pressures, steam or jets of water.
Possible effects
● Chemical or electro-chemical interactions with subsequent corrosion or
disintegration of motor parts.
● Damage to the winding insulation and irreparable damage to the motor.
Possible countermeasures ● Provide suitable covers or seals to protect the motor.
● Use only such coolants lubricants and other media which do not have
any aggressive or disintegrating effect on the motor parts.
● Do not clean under high pressures, steam or jets of water.
The machine manufacturer is responsible for conducting the tests and for
providing suitable measures.
MBT High Synchronous Torque Motors 261/409
Application notes
R911298798_Edition 08 Bosch Rexroth AG