Designation
Symbol
Unit
Description
Thermal time constant
T
th
min
Duration of the temperature rise to 63% of the final temperature of the motor
housing at motor load with permissible S1 continuous torque. The thermal time
constant is determined by the cooling type used.
①: time course of the temperature on the motor housing
Θmax: Highest temperature (motor housing)
T
th
: Thermal time constant
Duration of the temperature rise to 63% of the final temperature of the motor
housing at motor load with permissible S1 continuous torque. The thermal time
constant is determined by the cooling type used.
Maximum speed
n
max
min
-1
Maximum permissible speed of the motor.
Sound pressure level
L
P
dB(A)
Determined values for 1 m distance from motor to measuring point.
Mass
m
kg
Mass of the motor.
Ambient temperature during
operation
T
amb
°C
0 … 40 °C
Protection class
-
-
IP protection class acc. to EN 60034
Insulation class
-
-
Insulation class according to DIN EN 60034-1
Holding torque
M
4
Nm
Transmittable holding torque of the holding brake.
Rated voltage
U
N
V
Input voltage of the holding brake.
Rated current
I
N
A
Current consumption of the holding brake.
Connection time
t
1
ms
Time until the holding brake is closed.
Disconnection time
t
2
ms
Time until the holding brake is released.
Moment of inertia of the brake
J
Br
kgm
2
Moment of inertia of the holding brake, must be added to the moment of inertia of
the motors to determine the total moment of inertia.
Operation mode
MSK motors are documented according to test criteria and measuring meth‐
ods in compliance with EN 60034-1. The specified characteristic curves cor‐
respond to operation modes S1 or S3.
Bosch Rexroth AG
DOK-MOTOR*-MSK*EXGIIK3-PR09-EN-P
32/175
Synchronous Servomotors MSK For Potentially Explosive Areas
Technical data