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BETA Protecting
Overvoltage Protection Devices
Configuration
6/27
Siemens ET B1 · 10/2008
6
*
You can order this quantity or a multiple thereof.
Scope when installing overvoltage protection systems
The scope of IEC 60364-4-443 – Electrical installations of buildings,
Protection for safety; Protection against voltage disturbances
and electromagnetic disturbances – extends from the protective
device over the counter, through to the socket outlet.
The scope of IEC 61024-1 – Protection of structures against
lightning – and IEC 61312-1 – Protection against lightning
electromagnetic impulse – extends from the incoming main
feeder box through to the socket outlet and includes grounding
measures for SPDs.
If a lightning protection equipotential bonding is installed, it must
be connected to the base points of the overvoltage protective
devices.
TN-C system
TN-S system
TT system
PAS = Equipotential bonding strip
RCD (Residual Current Device): Residual current-operated circuit breakers
L1
L2
L3
N
PE
kWh
F3
F2
F2
F1
PEN
PAS
I2_13773a
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
TN system
Lightning
arrester
Plant grounding
Device protection
Lightning protection
equipotential bonding
L1
L2
L3
N
PE
kWh
F3
F2
F1
PEN
PAS
I2_13774a
F2
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
TN system
Lightning
arrester
Plant grounding
Device protection
Lightning protection
equipotential bonding
L1
L2
L3
N
PE
kWh
F3
F2
F1
PAS
I2_13775a
F2
RCD
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
Plant grounding
Device protection
Lightning arrester
TT system
Lightning protection
equipotential bonding
© Siemens AG 2008