Electrostatic Charge Of People; Additional Safety Measures Against Discharges Of Static Electricity - Siemens SIMATIC Panel PC 870 Equipment Manual

Release 11/02
B.2

Electrostatic Charge of People

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. B-1.
These values correspond to 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 B-1
B.3 Additional safety measures against discharges of static
electricity
Ensuring a good ground connection
When handling electrostatic sensitive devices, ensure that your person, the
workplace and packaging are grounded. In this manner you avoid static charge.
SIMATIC Panel PC 870 Computing Unit, Equipment Manual
1
2
3
Electrostatic voltages which an operator can be charged with
1 synthetic material
2 wool
3 antistatic material, e.g.
wood or concrete
rel. humidity
in %
ESD Guidelines
B-3