Siemens FS20 Application Manual page 15

Zone 1
Zone 2
Protective zone Position
Zone 0/A Outside buildings
Zone 0/B
Zone 0/C
Zone 0/E In building roof
(<0.5 m)
In inner wall area
(<0.5 m and above
20 m)
Zone 1 In devices
In rooms
Neighboring 'zone 0'
Building Technologies
Fire Safety
Position of protective zones around buildings
The protective zone 0/E is actually located inside the building, but is assigned to
the outer area for consideration in the case of fire detection installations.
Zone 0/E
0,5 m
Figure 2: Example of protective zones on buildings
Impact on system
● Surge voltage has a direct and
unattenuated effect.
● A direct lightning effect is possible.
● No shielding from electromagnetic
field.
● The surge voltage is attenuated.
● No direct lightning effect.
● No shielding from electromagnetic
field.
● No dangerous step voltage.
● No direct lightning effect.
● No shielding from electromagnetic
field.
● The lightning partial currents are
reduced and flow via surge protectors
or equipotential bonding lines.
● The electromagnetic field is
attenuated by shield 1.
Zone 0
Zone 0/E
Zone 1
0,5 m
Zone 2
Protective zones
5
Zone 2
Zone 1
Measures
None
External lightning
protection is installed.
Earthing network is
installed.
Internal and external
lightning protection
measures are
coordinated and
installed. All cables
leading into the building
are included in the
lightning protection
equipotential bonding.
15 | 42
2016-04-04