Siemens Simatic 620 - Manual (Page 185)

Guidelines for handling electrostatic
A-3
SIMATIC Box PC 620 Manual
A5E00131465-01
A.2 Electrostatic charging
Charging
Anyone who is not conductively connected to the electrical potential of their
surroundings can be electrostatically charged.
The maximum electrostatic voltage values which an operator can be charged with
when contacting the materials stated in the illustration are shown in Fig. A–1.
These values correspond to the specifications of IEC 801–2.
Voltage in kV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
(kV)
5 10 20 30 40 50 60 70 80 90 100
rel. humidity
in %
1
3
1 synthetic material
2 wool
3 antistatic material, e.g.
wood or concrete
2
Figure A-1 Electrostatic voltages which an operator can be charged with