Electrical connection
6.3 Tightening torques
1MB155 / 1MB555
70
Operating Instructions, 03/2018, A5E41926185A
6.2.3
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.
6.3
Tightening torques
In the technical data you will find the Tightening torques for screw and bolt connections
(Page 143).
6.3.1
Terminal board and grounding
Table 6- 3
Tightening torques for electrical connections on the terminal board and grounding
Thread ∅
M 3.5
M 4
M 5
M 6
M 8
M 10
M 12
M 16
Nm
min
0.8
0.8
1.8
2.7
5.5
9
14
27
Max.
1.2
1.2
2.5
4
8
13
20
40
6.3.2
Stud-type bushings
Table 6- 4
Tightening torques for stud-type bushings
Thread ∅
M 4
M 5
M 6
M 8
M 10
M 12
M 16
M 20
Nm
Min.
1
1.6
2.5
5
8
13
25
42
Max.
1.2
2
3
6
10
15.5
30
52
6.3.3
Additional connecting terminals for monitoring equipment and anti-condensation
heating
Table 6- 5
Tightening torques for monitoring equipment and anti-condensation heating
Main terminal box
EN 60999-1: 2000 table 4 III
0.4 Nm
Auxiliary terminal box
min 0.6 Nm
max 0.8 Nm
Summary of Contents for SIMOTICS XP 1MB155
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Page 94: ...Start up 7 2 Switching on 1MB155 1MB555 92 Operating Instructions 03 2018 A5E41926185A ...
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