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Electrical connection
6.6 Connecting the converter
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
Rms value of the alternat‐
Values apply at an installation altitude of up to 2000 m.
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 specifications 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
≤ 500 V
Table 6-6
Maximum voltage peaks at the motor terminals for motors specifically designed for converter operation
Rated motor voltage
V
92
Minimum air clearance dependent on rms value of the alternating voltage U
ing voltage U
rms
≤ 250 V
≤ 500 V
≤ 630 V
≤ 1000 V
Û
phase-to-phase
V
pk
1500
Û
phase-to-phase
V
pk
Minimum air clearance
Ex tc
Ex tb
3.0
3.0
5.5
8.0
Maximum peak voltage at the motor terminals
Û
phase-to-ground
V
pk
1100
Maximum peak voltage at the motor terminals
Û
phase-to-ground
V
pk
Operating Instructions, 11/2023, A5E52779900A
mm
Ex nA
Ex ec
2.5
5.0
5.5
8.0
DC link U
V
750
DC link U
V
1MB..1/2/3/4 - shaft heights 63 ... 355
rms
Ex e
Ex eb
5.0
8.0
10.0
14.0
DC
DC
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