Brochure/Catalogue

TN-C systems
TT systems
IT systems
Neutral conductor and protective earth conductor functions
are combined throughout the network in a single conductor,
the PEN conductor (4-conductor-system).
One point is earthed directly (operational earth). The exposed
conductive parts of the electrical installation are connected
to earth lines separate from the operational earth.
There is no direct connection between active conductors
and earthed parts. The exposed conductive parts of the
electrical installation are earthed.
Position LPL Type Order No. Page
1
I/II VPU I 3+1 LCF 280 V/25 kA 1351780000 C.14
III/IV VPU I 3+1 LCF 280 V/12,5 kA 1352020000 C.22
2
VPU II 3+1 280 V/40 kA 1352650000 C.35
3 VPU II 3+1 280 V/40 kA 1352650000 C.35
Position LPL Type Order No. Page
1
I/II VPU I 3 400 V/25 kA 1351870000 C.18
III/IV VPU I 3 400 V/12,5 kA 1352340000 C.27
2
VPU II 3 400 V/40 kA 1352880000 C.39
3 VPU II 3 400 V/40 kA 1352880000 C.39
Position LPL Type Order No. Page
1
I/II VPU I 3 LCF 280 V/25 kA 1351690000 C.13
III/IV VPU I 3 LCF 280 V/12,5 kA 1352090000 C.23
2
VPU II 3 280 V/40 kA 1352700000 C.34
3
VPU III 3 280 V 1393050000 C.65
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TN-C-S systems
Neutral conductor, PEN conductor and equipotential bonding
system are connected once at the main distribution board or after
the incoming supply to the building. Therefore, a TN-C system
becomes a TN-S system (TN-C-S system) from this point onwards.
Position LPL Type Order No. Page
1
I/II VPU I 3 LCF 280 V/25 kA 1351690000 C.13
III/IV VPU I 3 LCF 280 V/12,5 kA 1352090000 C.23
2
VPU II 3+1 280 V/40 kA 1352650000 C.35
VPU II 4 280 V/40 kA 1352680000 C.34
3 VPU III R 230 V/6 KV AC 1351650000 C.62
TN-S systems
Neutral conductor and protective earth conductor are
separated throughout the network.
Position LPL Type Order No. Page
1
I/II VPU I 3+1 LCF 280 V/25 kA 1351780000 C.14
III/IV VPU I 3+1 LCF 280 V/12,5 kA 1352020000 C.22
2
VPU II 3+1 280 V/40 kA 1352650000 C.35
VPU II 4 280 V/40 kA 1352680000 C.34
3 VPU III R 230 V/6 KV AC 1351650000 C.62
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Examples of applications in 230/400 V systems
2028840000