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Electrical connection
6.5 Inserting and routing the cables
6.5.11
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 6-5
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.
6.5.12
Finishing connection work
1. Before closing the terminal box, please check that:
2. Close the terminal box with the cover fixing screws, see chapter Tightening torques for
See also
Mounting/removing the terminal box (Page 88)
100
Minimum air clearance dependent on rms value of the alternating voltage U
Rms value of the alternating voltage V
≤ 500 V
≤ 630 V
≤ 800 V
≤ 1000 V
≤ 1250 V
– The electrical connections in the terminal box have been made in accordance with the
specifications above and tightened with the correct tightening torque.
– The machine is connected in such a way that it rotates in the direction specified.
– The inside of the terminal box is clean and free of any cable debris, dirt and foreign
bodies.
– All of the seals and sealing surfaces of the terminal box are intact and in a good condition.
– Any unused cable entries are sealed with glued-in ferrous or certified sealing elements.
The sealing elements can only be removed with a tool.
– The connecting cables are laid in an open arrangement, so that the cable insulation
cannot be damaged during operation.
screw and bolt connections (Page 179).
Minimum air clearance
rms
rms
8 mm
10 mm
12 mm
14 mm
18 mm
SIMOTICS FD 1MH1
Operating Instructions 08/2017
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