ABB OVRHT3 Series Installation, Operation And Maintenance Manual page 3

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Electrical connections
Please see Table 1 for circuit breaker requirements
L1
L1
N
N G
N
Xo BOND
G
EARTH
GROUND
Figure 1: 1-phase, 2-wire
OVRHS3U401201P OVRHT3B(C)502401P
OVRHS3U402401P OVRHT3B(C)502771P
OVRHT3B(C)501201P OVRHT3B(C)504801P
B
A B C
N
N G
C A
N
Xo BOND
G
EARTH
GROUND
Figure 3: 3-phase Wye, 4-wire
OVRHS3U402083Y OVRHT3B(C)502303Y
OVRHS3U402773Y OVRHT3B(C)502403Y
OVRHS3U402303Y OVRHT3B(C)502773Y
OVRHT3B(C)501203Y OVRHT3B(C)503473Y
OVRHT3B(C)502203Y
Note: High-Leg Orange must be B Phase
B
A B C
N
N G
C
A
N
Xo BOND
G
EARTH
GROUND
Figure 5: 3-phase High-Leg Delta, 4-wire
OVRHT3B(C)502403H
1
1-POLE
CIRCUIT BREAKER
SPD
L
G
N
1
3-POLE
CIRCUIT BREAKER
SPD
A
B
C
G
N
1
3-POLE
CIRCUIT BREAKER
SPD
A
B
C
G
N
L1 L2
N
N
L1
L2
N
Xo BOND
G
EARTH
GROUND
Figure 2: 2-phase, 3-wire
OVRHS3U401202S
OVRHT3B(C)501202S
OVRHT3B(C)502402S
B A B C
N
C A
G
EARTH
GROUND
Figure 4: 3-phase Delta, 3-wire
OVRHS3U402403D OVRHT3B(C)504003D
OVRHS3U404803D OVRHT3B(C)504153D
OVRHT3B(C)502403D OVRHT3B(C)504803D
OVRHT3B(C)503803D OVRHT3B(C)506003D
CIRCUIT BREAKER
L1
L1
N
N G
N
Xo BOND
G
EARTH
GROUND
Figure 6: 1-phase, 2-wire (Earthing System)
OVRHT3B(C)502301PI OVRHT3B(C)502301PK
OVRHT3B(C)502301PJ OVRHT3B(C)502301PL
1
2-POLE
CIRCUIT BREAKER
SPD
L1
L2
G
G
N
1
3-POLE
CIRCUIT BREAKER
SPD
A
B
C
G
G
1
1-POLE
SPD
L
G
N
3