ABB OVRHSP 1203Y Series Manuale di installazione, funzionamento e manutenzione - Pagina 5
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Service configurations
Figures 1–5 show the electrical relationship between OVRHSP(SR)
series unit and these five basic service configurations:
1-phase, 2-wire; 2-phase, 3-wire; 3-phase Wye, 4-wire;
3-phase Delta, 3-wire and 3-phase High-Leg Delta, 4-wire.
L1
L1
N
N
N
Xo BOND
G
EARTH
GROUND
Figure 1: 1-phase, 2-wire
L1
N
N
L1
L2
N
Xo BOND
G
EARTH
GROUND
Figure 2: 2-phase, 3-wire
1
30–200 AMP, 1-POLE
CIRCUIT BREAKER
OVRHSP(SR)
L
G
G
N
2
CONDUCTORS
FURNISHED WITH
OVRHSP(SR)
1
30–200 AMP, 2-POLE
CIRCUIT BREAKER
L2
OVRHSP(SR)
L1
L2
G
G
N
2
CONDUCTORS
FURNISHED WITH
OVRHSP(SR)
B
A B C
N
N
C
A
N
Xo BOND
G
EARTH
GROUND
Figure 3: 3-phase Wye, 4-wire
B
A B C
N
C
A
G
EARTH
GROUND
Figure 4: 3-phase Delta, 3-wire
Note: High-Leg Orange must be B Phase
B
A B
N
N
C
A
N
Xo BOND
G
EARTH
GROUND
Figure 5: 3-phase High-Leg Delta, 4-wire
1
All OVRHSP(SR) series units can be connected without an
upstream breaker/fuse.
2
OVRHSP 60 through 100kA and all OVRHSR units are
furnished with #10 AWG leads.
OVRHSP/OVRHSR surge protective device | Product manual 5
1
30–200 AMP, 3-POLE
CIRCUIT BREAKER
OVRHSP(SR)
A
B
C
G
G
N
2
CONDUCTORS
FURNISHED WITH
OVRHSP(SR)
1
30–200 AMP, 3-POLE
CIRCUIT BREAKER
OVRHSP(SR)
A
B
C
G
G
2
CONDUCTORS
FURNISHED WITH
OVRHSP(SR)
1
30–200 AMP, 3-POLE
CIRCUIT BREAKER
C
OVRHSP(SR)
A
B
C
G
G
N
2
CONDUCTORS
FURNISHED WITH
OVRHSP(SR)