6.5.4 Minimum air clearances
After proper installation, verify that the minimum air clearances between non-insulated parts
are maintained. Be aware of any protruding wire ends.
Table 6-4 Minimum air clearance dependent on rms value of the alternating voltage U
rms
Rms value of the alternat‐
ing voltage U
rms
Minimum air clearance
mm
Ex tc
Ex tb
Ex nA
Ex ec
Ex e
Ex eb
≤250V 3.0 2.5 5.0
≤500V 3.0 5.0 8.0
≤630V 5.5 5.5 10.0
≤1000V 8.0 8.0 14.0
Values apply at an installation altitude of up to 2000m.
When determining the required minimum air clearance, the voltage value in the table may be increased by
a factor of 1.1, so that the rated input voltage range is taken into account during general use.
6.6 Connecting the converter
NOTICE
Material damage caused by an excessively high supply voltage
Material damage can occur if the supply voltage is too high for the insulation system.
• Observe the values in the following tables.
SIMOTICS machines can be operated with SINAMICS converters (uncontrolled and controlled
infeed) when maintaining the permissible voltage peaks.
The insulation system of SIMOTICS machines corresponds to the specications laid down in
IEC 60034-18-41 according to voltage stress category C (IVIC C = high stress).
Table 6-5 Maximum voltage peaks at the motor terminals for line (DOL) motors, converter operation possible
Rated motor voltage
V
Maximum peak voltage at the motor terminals
Û
phase-to-phase
V
pk
Û
phase-to-ground
V
pk
DC link U
DC
V
≤ 500V 1500 1100 750
Table 6-6 Maximum voltage peaks at the motor terminals for motors specically designed for converter operation
Rated motor voltage
V
Maximum peak voltage at the motor terminals
Û
phase-to-phase
V
pk
Û
phase-to-ground
V
pk
DC link U
DC
V
Electrical connection
6.6Connecting the converter
1MB..1/2/3/4 - shaft heights 63 ... 355
92 Operating Instructions, 11/2023, A5E52779900A
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