Page 22 - Surge-Protection-E_0.pdf

International Power Supply Systems
International system configurations* according to IEC 60364-1

L1 TN-C system TN-S system L1
L2 L2
L3 L3
PEN PE
N

R B
R B
TN-C system 230 / 400 V TN-C-S system 230 / 400 V

L1 L1 L1
L2 L2 L2
L3 L3 L3
N N
PE
PE PE
R B R B R A R A
TN-S system 230 / 400 V TT system 230 / 400 V IT system 230 V

Further international system configurations*

L1 L1 L1
L L1
N L2
N N
G L2 L2 L3
L2 L3 L3 N
G G G G

single-phase; 3 wire single-phase; 4 wire three-phase; 4 wire three-phase; 5 wire three-phase; 5 wire
Split Phase or Edison Delta “Highleg“
(1 Ph, 2 W + G) (1 Ph, 3 W + G) (3 Ph Y, 3 W + G) (3 Ph Y, 4 W + G) (3 Ph Δ, 4 W + G)
110 V 120 V / 240 V 480 V 120 V / 208 V 120 V / 240 V
120 V 277 V / 480 V
220 V
240 V

L1
L1
R
L2 L2 R 100 V
L3 L3 200 V T N
G G

three-phase; 4 wire three-phase; 4 wire single-phase; 2 wire single-phase; 2 wire
Delta “Ungrounded“ Delta “Grounded Corner“
(3 Ph Δ, 3 W + G) (3 Ph Δ, 3 W + G) (1 Ph, 2 W) (1 Ph, 2 W)
240 V 240 V 200 V 100 V
480 V 480 V

R R R
200 V 100 V 200 V 200 V 200 V S
N 200 V 200 V 100 V
100 V 200 V T 100 V N
T T
S

single-phase; 3 wire three-phase; 3 wire three-phase + single-phase
(1 Ph, 3 W) (3 Ph, 3 W)
100 V / 200 V 200 V 100 V / 200 V; 200 V

* System according to the earth connection (according to IEC 60364-1)

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