Cut Sheet

Volume 2—Commercial Distribution CA08100003E—June 2012 www.eaton.com V2-T2-143
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2.5
Transfor mers
Distribution Transformers
Product Selection
For quick selection data,
refer to the tables on this
and the following pages.
Selection Requirements
You should have the following
information before selecting a
buck-boost transformer:
Line Voltage
The voltage that you want
to buck (decrease) or boost
(increase). This can be found
by measuring the supply line
voltage with a voltmeter.
Load Voltage
The voltage at which your
equipment is designed to
operate. This is listed on
the nameplate of the
load equipment.
Load Amperes or Load kVA
You do not need to know
both—one or the other is
sufficient for selection
purposes. This information
usually can be found on the
nameplate of the equipment
that you want to operate.
Frequency
The supply line frequency
must be the same as the
frequency of the equipment
to be operated—Eaton’s
buck-boost transformers
operate at 60 Hz only.
Phase
The supply line should be
the same as the equipment
to be operated—either single-
or three-phase.
Transformer Interconnection
For three-phase applications,
interconnections of
transformers should be
made in a junction box.
Two or three transformers
may be used depending
on an open delta (2) or
wye (3) connection.
5-Step Selector
The tables that follow will
simplify the selection of the
buck-boost transformers.
There are no calculations
needed; simply follow these
five steps:
1. Refer to the table having
the same output voltage
as the equipment you
want to operate. For
example, if you are
installing a 240 volt
6 kVA single-phase
load use selection table
on the page.
2. Select the available line
voltage across the top of
the chart that is closest
to the actual supply
voltage. Therefore, for
example, if the available
line voltage is 213 volts,
use the 212 volt column.
3. Read down the column
until you reach an output
kVA or amps rating equal
to or greater than the
load requirements. Since
6 kVA, in the example, is
not listed, use the next
higher rating, or 7.5 kVA.
4. Read across to the far
left columns for the
catalog number and
quantity of transformers
for your application. In
this case, you will need
one (1) catalog number
S10N06P01P.
5. Connect the buck-boost
transformer(s) you have
selected in accordance
with the connection
diagram specified at the
bottom of the available
line voltage column. In
this example, Diagram
“F” would be used.
Note: For single-phase
connections and three-phase
open delta connections, inputs
and outputs may be reversed.
kVA capacity remains constant.
Additional Product Selection
information begins on
Page V2-T2-187.
120 x 240 Volts to 12/24 Volts
120 x 240 Volts to 16/32 Volts
240 x 480 Volts to 24/48 Volts
Note
Frame drawings/dimensions information begins on Page V2-T2-213.
kVA °C Temp. Rise Frame Weight Lbs (kg) Style Number
0.05 115 FR52 7 (3) S10N04A81N
0.10 115 FR54 7 (3) S10N04A82N
0.15 115 FR55 8 (4) S10N04A83N
0.25 115 FR57P 12 (5) S10N04P26P
0.50 115 FR57P 13 (5) S10N04P51P
0.75 115 FR58AP 21 (10) S10N04P76P
1 115 FR67P 31 (14) S10N04P01P
1.5 115 FR67P 40 (18) S10N04P16P
2 115 FR68P 40 (18) S10N04P02P
3 115 FR176 65 (29) S10N04A03N
5 115 FR177 113 (51) S10N04A05N
7.5 115 FR178 123 (55) S10N04A07N
kVA °C Temp. Rise Frame Weight Lbs (kg) Style Number
0.05 115 FR52 7 (3) S10N06A81N
0.10 115 FR54 7 (3) S10N06A82N
0.15 115 FR55 8 (4) S10N06A83N
0.25 115 FR57P 12 (5) S10N06P26P
0.50 115 FR57P 13 (5) S10N06P51P
0.75 115 FR58AP 21 (10) S10N06P76P
1 115 FR67P 31 (14) S10N06P01P
1.5 115 FR67P 40 (18) S10N06P16P
2 115 FR68P 40 (18) S10N06P02P
3 115 FR176 65 (29) S10N06A03N
5 115 FR177 113 (51) S10N06A05N
7.5 115 FR178 123 (55) S10N06A07N
kVA °C Temp. Rise Frame Weight Lbs (kg) Style Number
0.05 115 FR52 7 (3) S20N08A81N
0.10 115 FR54 7 (3) S20N08A82N
0.15 115 FR55 8 (4) S20N08A83N
0.25 115 FR57P 12 (5) S20N08P26P
0.50 115 FR57P 13 (5) S20N08P51P
0.75 115 FR58AP 21 (10) S20N08P76P
1 115 FR67P 31 (14) S20N08P01P
1.5 115 FR67P 40 (18) S20N08P16P
2 115 FR68P 40 (18) S20N08P02P
3 115 FR176 65 (29) S20N08A03N
5 115 FR177 113 (51) S20N08A05N
7.5 115 FR178 123 (55) S20N08A07N