Figure 4: 3-phase Delta, 3-wire
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.
Service configurations
Figure 1: 1-phase, 2-wire
30–200 AMP, 1-POLE
1
CIRCUIT BREAKER
OVRHSP(SR)
G
N
EARTH
GROUND
Xo BOND
CONDUCTORS
2
FURNISHED WITH
OVRHSP(SR)
L1
L1
N
N
G
N
G
L
Figure 2: 2-phase, 3-wire
30–200 AMP, 2-POLE
1
CIRCUIT BREAKER
OVRHSP(SR)
L1
L2
G
N
EARTH
GROUND
Xo BOND
CONDUCTORS
2
FURNISHED WITH
OVRHSP(SR)
L1
N
L2
N
G
L1
L2
N
G
Figure 3: 3-phase Wye, 4-wire
30–200 AMP, 3-POLE
1
CIRCUIT BREAKER
OVRHSP(SR)
EARTH
GROUND
Xo BOND
B
N
C
A
N
G
N
G
CONDUCTORS
2
FURNISHED WITH
OVRHSP(SR)
A
B
C
G
N
A B C
30–200 AMP, 3-POLE
1
CIRCUIT BREAKER
B
C
A
N
G
OVRHSP(SR)
CONDUCTORS
2
FURNISHED WITH
OVRHSP(SR)
A
B
C
G
A B C
G
EARTH
GROUND
OVRHSP/OVRHSR surge protective device
| Product manual 5
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.
Figure 5: 3-phase High-Leg Delta, 4-wire
Note: High-Leg Orange must be B Phase
A
30–200 AMP, 3-POLE
1
CIRCUIT BREAKER
A B
B
C
C
N
N
G
N
G
OVRHSP(SR)
CONDUCTORS
2
FURNISHED WITH
OVRHSP(SR)
A
C
B
G
N
EARTH
GROUND
Xo BOND
