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Buck boost transformer
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Power supply/ buck boost transformers
120Volt input > choose 12 or 24 Volt output
120 or 240 to 12-24 volt
Convert 480Volt to 240Volt or 120Volt
 Why can a buck-boost transformer operate a kVA load many times larger than the kVA rating on its nameplate?
Read Question-answers-Buck-Boost-Transformers.pdf

Buck boost wiring:
480Volt input connects to H1 H4, and then H2 and H3 are connected together
240Volt input connects to H1 H4, and then H3 connects to H1, and H2 connects to H4

240Volt output connects to X1 X4, and then X2 and X3 are connected together
120Volt output connects to X1 X4, and then X3 connects to X1, and X2 connects to X4

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Buck boost transformer
Siemens transformer at Amazon

Resources:
Kva is Kilo watts: 1 kilo watt is 1000 watts, so .5 Kva is 500 watts
Va = volts x amps = watts
Electrical formulas
Read about household single-phase electricity
Read about 3-phase
How to wire 3-phase timers
buck boost transformerSiemens industrial transformers
Inexpensive .... requires enclosure
5.1 x 5.6 x 3.6 inches ; 3 pounds

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Siemens industrial transformers
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The Buck-Boost Transformer has four separate windings; two windings in the primary and two windings in the secondary.
A Buck converter steps down (bucks down) an input (primary) voltage to a lower output (secondary) voltage level.
A Boost converter steps up (boosts up) an input (primary) voltage to a higher output voltage level.

Buck–boost transformers can be used to power low voltage circuits including control, lighting circuits, or applications that require 12, 16, 24, 32 or 48 volts, consistent with the design's secondaries.
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