Interroll Drum motor series i, S, S/A, D
General technical information
Version 4.1 (06/2015) en-US
Translation of original instruction manual
15
PTC
Maximum operating voltage
W
25
Thermal time constant
s
< 10
Resistance at switching temperature
+ 15 K
Ω
1330 ... 4000
+ 5 K
Ω
550 ... 1330
Ω
550
- 5 K
Ω
250 ... 550
- 20 K
Ω
< 250
In particular, if the motor does not have an internal thermal winding protection, a suitable
external thermal control relay/contactor must be connected upstream.
A thermal winding protection does not replace the overcurrent protection. In addition, every
motor must be connected to a suitable overcurrent protection which is set to the rated motor
current.
Use of 50-Hz motors on 60-Hz supply system
This option is not available for the D-series.
Rated motor voltage:
230/400 V - 3 ph - 50 Hz
System voltage:
230/400 V - 3 ph - 60 Hz
If a 50-Hz motor is connected to a 60-Hz supply system, the frequency increases and, as a
result, the speed by 20 %. Since the torque decreases accordingly, the motor output remains
constant. The voltage-dependent parameters change in the speed range under field control at
60 Hz according to the following table:
System voltage = rated motor voltage
Power
P
kW
100 %
Rated speed
n
n
1/min
120 %
Rated torque
M
n
Nm
83.3 %
Starting torque
M
A
Nm
64 %
Pull-up torque
M
S
Nm
64 %
Pull-out torque
M
K
Nm
64 %
Rated current
I
N
A
95 %
Optional version: PTC
(positive temperature
coefficient)
Effect of using a motor
with 50-Hz rated motor
voltage on a 60-Hz supply
system
