KACO Powador XP500-XP550-HV TL - Manual (Page 16)

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APPENDIX
 Winding technology
Medium voltage transformer that is connected with transformerless solar inverter must be
designed with section winding transformer.
 Section winding transformer
C
o
re
L
V
W
1
L
V
W
2
L
V
W
3
H
V
W
1
H
V
W
2
H
V
W
3
C
o
re
L
V
W
1
L
V
W
2
H
V
W
1
H
V
W
2
LVW: Low Voltage winding
HVW: High Voltage winding
Case1. Dual stacked Case2. Triple stacked
 Multi-layer winding transformer
C
o
re
L
o
w
V
o
lt
a
g
e
w
in
d
in
g
1
L
o
w
V
o
lt
a
g
e
w
in
d
in
g
2
H
ig
h
V
o
lt
a
g
e
w
in
d
in
g
C
o
re
L
o
w
V
o
lt
a
g
e
w
in
d
in
g
1
L
o
w
V
o
lt
a
g
e
w
in
d
in
g
2
H
ig
h
V
o
lt
a
g
e
w
in
d
in
g
Case1. LLH Case2. LHL