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2 Installation
2.10 Transformer Output Load Sharing
2.10.1: Transformer Output
The units have a single phase output. It does NOT have three phase characteristics.
Figure 2.6 shows the voltages between L1, L2 and N for 120/208/240 units and between L and
N for 230 VAC units
TRANSFORMER
120 VAC
2.10.2: Load Sharing
The total current drawn from each winding must not exceed that winding's maximum output
current rating (Figure 2.7). For 60 Hz units, where possible, connect 120 VAC loads to L1.
Since loads are shared, you can exceed one of the winding's current ratings without
exceeding the unit's total output current rating. There are two ways to calculate the
current drawn by the loads; measuring and displaying the current.
60 Hz Units
FERRO
240 VAC
32 VAC
208 VAC
120 or 88 VAC
88 VAC
NEUTRAL
L1
120 VAC
120 VAC
Transformer Output
M
M
M
M
M
a
a
a
a
a
i x
i x
i x
i x
i x
m
m
m
m
m
M
M
M
M
M
o
o
o
o
o
d
d
d
d
d
l e
l e
l e
l e
l e
C
r u
e r
n
W
n i
d
n i
7 K
7 K
7 K
7 K
7
5 .
5 .
5 .
5 .
K
5 .
1 K
1 K
1 K
1 K
1
0
0
0
0
0
K
1 K
1 K
1 K
1
1 K
5
5
5
5
5
K
Transformer Output Current Ratings
26
FERRO
TRANSFORMER
240 or 208 VAC
Figure 2.6
u
u
u
u
u
m
m
m
m
m
R
R
R
R
R
a
a
a
a
a
e t
e t
e t
e t
e t
d
d
d
d
d
M
M
M
M
M
a
a
a
a
a
i x
i x
i x
i x
i x
m
m
m
m
m
u
u
u
u
u
m
m
m
m
m
f t
r o
E
a
c
h
V
A
f
r o
E
a
c
g
A (
m
) p
V
A
C
W
n i
36
36
3
36
6
4
4
4
4
3
3
3
3
2
2
2
2
0
0
0
0
36
4
3
2
0
48
4
48
48
48
8
5
5
5
5
5
7
7
7
7
7
6
6
6
6
6
0
0
0
0
0
72
72
72
72
7
2
8
8
8
8
8
6
6
6
6
6
4
4
4
4
4
0
0
0
0
0
Figure 2.7
50 Hz Units
L
230 VAC
N
O
O
O
O
O
u
u
u
u
u
p t
p t
p t
p t
p t
t u
t u
t u
t u
t u
h
1
2
0
d
n i
g
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