SIEMENS
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Siemens D 83.1 · 2016
2
Motors with Explosion Protection
LOHER CHEMSTAR and VARIO 1PS4 and 1PS5 motor series
General information
■
Technical specifications
(continued)
Motors with built-on backstop
If reverse motion of the drive has to be prevented following
switch-off, three-phase motors with mechanical backstop can
be used. Backstops are maintenance-free and have individual
spring-loaded clamping elements. The backstops of the type
CSK are supplied with permanent lubrication. The clamping
elements have a tendency to lift. In backstops of the FXM type
series, the clamping elements lift automatically after approach
due to the centrifugal force. Wear therefore does not occur at
rated speed of the motor.
The backstop is not permitted to be used as protection against
rotation in the wrong direction caused by switching despite the
interlock. The direction of rotation must be specified on ordering.
The motor power ratings are as specified in the selection tables
in this catalog. The assignment of backstops to frame sizes is
specified in the table below. Frame sizes 90 to 112 have the
same dimensions as standard motors. Dimensional drawings
are available for the larger types on request.
Backstops for motors of frame sizes 132 to 355
With the backstops listed in the table above, motors of frame
sizes 90 to 355 can be supplied in IP55 or IP56 degree of
protection. Higher degrees of protection on request.
Axially-mounted forced ventilation
Forced ventilation with axially-mounted fans is mainly used with
converter operation. It serves to increase the motor utilization
while lowering the sound level in accordance with the
synchronous speed. Motors with forced ventilation are designed
for rated voltage ranges in accordance with the following table.
The data is shown on the rating plate on the external fan or on
the motor with forced ventilation.
Degree of protection:
IP55, available as a special version up to
IP66.
Special versions for higher ambient temperatures, increased
vibration loading on request.
Retrofitting of forced ventilation is only possible following the
prior consent of Siemens Ruhstorf.
Rated voltage ranges for forced ventilation on motors of the 1PS4 and 1PS5 series
Motor
Backstop
Frame size
No. of poles
Type
M
t
Nm
132
2, 4, 6
FXM 51-25 DX
On request
160
2, 4, 6
FXM 66-25 DX
400
180
2, 4, 6
FXM 66-25 DX
400
200
2, 4, 6, 8
FXM 86-25 DX
430
225
2, 4, 6, 8
FXM 86-25 DX
430
250
2, 4, 6, 8
FXM 100-50 DX
860
280
2, 4, 6, 8
FXM 120-50 SX
860
315
2, 4, 6, 8
FXM 120-50 SX
On request
355
2
FXM 120-50 SX
On request
355
4, 6
FXM 140-50 SX
On request
Motor
Motor type
Line/
Connection
Rated voltage range
Frequency
Rated power
Rated current max.
Frame size
V
Hz
kW
A
LOHER CHEMSTAR
132 … 225
DN.W-071BG-04
Y
400
50
0.25
0.70
DN.W-071BH-04
440
60
0.44
1.05
250
DN.W-071BG-04
Y
400
50
0.25
0.70
DN.W-080BH-04
440
60
0.90
1.90
280 … 315
DN.W-080BG-04
Y
400
50
0.75
1.70
DN.W-080BH-04
440
60
0.90
1.90
355 IM
DN.W-100LS-04
400
50
3
6.40
60 Hz on request
LOHER VARIO
355 … 500
50 Hz on request
60 Hz on request
© Siemens AG 2016