Siemens 1MB115 Installation And Maintenance Manual page 102

Table 4-3 Terminal box with cable gland
T hread size for additional entries, e.g. PTC thermistor or heater M16 x 1.5 or
M20 x 1.5
4.2.2 Minimum air clearances
After proper installation, verify that the minimum air clearances between
noninsulated parts are maintained. Be aware of any protruding wire ends.
Table 4-4 Minimum air clearance dependent on rms value of the alternating
voltage U
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.
4.2.3 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.
102
Frame size
80 ... 90
100 ... 132
160 ... 180
200 ... 225
250 ... 315
355
有效
Rms value of the alternating voltage
V
≤ 500 V
≤ 630 V
≤ 1000 V
rms
Thread size of the cable gland
1x M 16x1.5
1x M 25x1.5
2x M 32x1.5
2x M 40x1.5
2x M 50x1.5
2x M 63x1.5
2x M 80x2
Minimum air clearance
Ex d
6 mm
8 mm