Siemens SIMATIC Box PC 820 Manual page 177

A.2 Electrostatic Charging of Persons
Charging
Every person with a non-conductive connection to the electrical potential of its
surroundings can be charged electrostatically.
Figure A-1 shows you the maximum values for electrostatic voltages which can
build up on a person coming into contact with the materials indicated in the figure.
These values are in conformity with the specifications of IEC 801-2.
Voltage in kV
(kV)
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
5 10 20 30 40 50 60 70 80 90 100
Figure A-1
Siemens Distributor
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
Guidelines for Handling Electrostatically-Sensitive Devices (ESD)
1
2 Wool
3 Antistatic material, for
1
2
3
Electrostatic Voltages which can Build up on a Person
Synthetic material
example, wood or concrete
Relative air
humidity in %
A-3