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28
Instruction Booklet
IB156002EN
Effective January 2022
Eaton HCU2/HCUn active harmonic
filter installation manual
EATON
www.eaton.com
Figure 27 . 30 A unit 200% neutral distributed and
300% neutral distributed
30A
Neutral must be sized for 60 A
40 A
L1
L2
L3
N
PEN
!
3p3d
200% neutral
300% neutral
L1
L2
L3
N
PEN
!
3p3d
3p3d
30 A
Neutral must be sized for 90 A
40 A
L1
L2
L3
N
!
30 A
Neutral must be sized for 90 A
40 A
L1
L2
L3
N
!
3p4d
30 A
Neutral must be sized for 90 A
125 A
L1
L2
L3
N
!
4p4d
30 A
Neutral must be sized for 60 A
80 A
L1
L2
L3
N
!
4p4d
30 A
Neutral must be sized for 90 A
125 A
L1
L2
L3
N
!
3p3d
30 A
Neutral must be sized for 60 A
40 A
L1
L2
L3
N
!
3p4d
30 A
Neutral must be sized for 60 A
80 A
TN-C
IT
30 A
TN-S/solidly grounded
When local code
permits 3P breaker
TT / TN-S
When local code
requires 4P breaker
Figure 28 . 50 A unit neutral not distributed and
100% neutral distributed
TN-C
TN-S/solidly grounded
When local code
permits 3P breaker
TT / TN-S
When local code
requires 4P breaker
Neutral not distributed
100% neutral
IT
30A
63 A
L1
L2
L3
N
PEN
3p3d
L1
L2
L3
N
PEN
3p3d
3p3d
50 A
63 A
L1
L2
L3
N
50 A
63 A
L1
L2
L3
N
4p3d
50 A
63 A
L1
L2
L3
N
3p3d
50 A
63 A
L1
L2
L3
N
4p4d
50 A
63 A
L1
L2
L3
N
3p3d
50 A
63 A
L1
L2
L3
N
3p3d
50 A
63 A
50 A
Figure 29 . 50 A unit 200% neutral distributed and
300% neutral distributed
50A
Neutral must be sized for 100 A
63 A
L1
L2
L3
N
PEN
!
3p3d
200% neutral
300% neutral
L1
L2
L3
N
PEN
!
3p3d
3p3d
50 A
Neutral must be sized for 150 A
63 A
L1
L2
L3
N
!
50 A
Neutral must be sized for 150 A
63 A
L1
L2
L3
N
!
3p4d
50 A
Neutral must be sized for 150 A
200 A
L1
L2
L3
N
!
4p4d
50 A
Neutral must be sized for 100 A
125 A
L1
L2
L3
N
!
4p4d
50 A
Neutral must be sized for 150 A
200 A
L1
L2
L3
N
!
3p3d
50 A
Neutral must be sized for 100 A
63 A
L1
L2
L3
N
!
3p4d
50 A
Neutral must be sized for 100 A
125 A
TN-C
IT
50 A
TN-S/solidly grounded
When local code
permits 3P breaker
TT / TN-S
When local code
requires 4P breaker
Figure 30 . 60 A unit neutral not distributed and
100% neutral distributed
TN-C
TN-S/solidly grounded
When local code
permits 3P breaker
TT / TN-S
When local code
requires 4P breaker
L1
L2
L3
N
Neutral not distributed
100% neutral
PEN
L1
L2
L3
N
PEN
3p3d
3p3d
L1
L2
L3
N
L1
L2
L3
N
3p3d
3p3d
L1
L2
L3
N
L1
L2
L3
N
3p3d
4p3d
L1
L2
L3
N
L1
L2
L3
N
3p3d
4p4d
IT
60 A
60 A
80 A
80 A
60 A
60 A
80 A
80 A
60 A
60 A
80 A
80 A
60 A
60 A
80 A
80 A