1 Installation with residual current devices
(RCDs)
For fraction second, surge protection devices
generate all-pole equipotential bonding.3.2.
3. Here, the three ex-
ternal conductors are connected the neutral wire
via the surge arrestors and insulating N-PE spark
gap used the earthing line.
Protection circuit around electronic device
Circuits that need incorporated into the equipo-
tential bonding system:
• Power supply lines
• Network and data cables
• Telecommunications cables
• Antenna cables
• Control cables
• Metallic pipes
(e. Suitable protection concepts must agreed
upon jointly planners, lightning protection engin-
eers, electricians and the operator/client. water and drainage pipes)
The cables must incorporated into the local equi-
potential bonding system either directly using suit-
able arrestors. this way, the surge current
is arrested earth first, preventing accidental tripping
of the RCD. ensure
maximum availability, surge arrestors must fitted
upstream the RCDs. The best lightning and surge protection
concept useless unless every electrical and metal
line entering the building the protection circuit in-
cluded the protection concept.3.
3.4 Versions
In building structures and electrical systems, meas-
ures for lightning and surge protection and e. When implement-
ing surge protection concept necessary ob-
tain information the devices and system compon-
ents protected and, where possible, gather them
into lightning protection zones (LPZs).2. the surge arrestor
can only fitted after the RCD, surge-current-proof
RCD must used.g.
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Chapter The internal lightning protection system
.6 Protection circuit
Only effective protection circuit providing uninter-
rupted surge protection can prevent dangerous poten-
tial differences devices/systems. According IEC 60364-5-53, use up-
stream RCD the network only permitted
in the case the circuit”.g. struc-
tural fire safety must taken into account and
tailored one another right from the planning stage.
Requirements laws such the German state build-
ing regulations and the current standards must ob-
served. The stipula-
tions insurance companies and network operators
should also taken into account.2.4
