Electrostatic Charging Of Persons - Siemens SIMATIC PG 720 P Manual

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.
Figure A-1
PG 720 P Programming Device
C79000-G7076-C721-02
Guidelines for Handling Electrostatically-Sensitive Devices (ESD)
Voltage in kV
(kV)
16
15
14
13
12
11
1
10
9
8
7
6
5
4
2
3
2
3
1
5 10 20 30 40 50 60 70 80 90 100
Electrostatic Voltages which can Build up on a Person
1 Synthetic material
Wool
2
3 Antistatic material, for
example, wood or concrete
Relative air
humidity in
%
A-3