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Electrical connection
6.1 Connecting the machine
6.1.1.10
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
Rms value of the alternating
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 in-
creased by a factor of 1.1, so that the rated input voltage range is taken into account during gen-
eral use.
6.1.1.11
Internal equipotential bonding
The internal equipotential bonding between the grounding terminal in the terminal box, the
terminal box components and the machine enclosure is ensured via metallic contact, a
copper braided strip or a stranded wire.
6.1.2
Cable glands
Cable glands with (sheet metal) nuts (EN 50262)
76
Minimum air clearance dependent on rms value of the alternating voltage
U
voltage
rms
≤ 250 V
≤ 500 V
≤ 630 V
≤ 1000 V
Minimum air clearance
Ex tc
Ex nA
Ex tb
Ex ec
3.0
3.0
5.5
8.0
①
Nut
O ring
②
Operating Instructions, 06/2020, A5E44455710A
U
rms
mm
Ex e
Ex eb
2.5
5.0
5.5
10.0
8.0
14.0
1MB..1/2/3/4 - shaft heights 63 ... 355
5.0
8.0
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