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Electrical connection
6.4 Connecting the machine
Remove insulation from the ends of the conductors so that the remaining insulation almost
reaches the cable lug.
Note
The direct contact between the cable lug surfaces and the contact nuts or contact screws ensure
that the connection can conduct current.
6.4.1.8
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 6-2
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.
Dangerous voltage when the rotor rotates
There are dangerous voltages at the terminals while the machine rotor rotates and immediately
afterwards.
You must observe the following safety instructions to prevent death, injury or material damage:
• Do not touch the terminals while the rotor is rotating and immediately afterwards.
• To discharge the winding, after the rotor comes to a standstill, connect the winding to
62
Minimum air clearance dependent on rms value of the alternating voltage U
Rms value of the alternating voltage U
≤ 250 V
≤ 500 V
≤ 630 V
≤ 1000 V
WARNING
ground potential.
Minimum air clearance
rms
Operating Instructions, 07/2020, A5E46712792A
rms
mm
3.0
3.0
5.5
8.0
1FU9
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