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Jefferson Electric Buck-Boost Transformers, Auto-Transformers and Isolation Transformers
- 240 x 120 VAC to 24 x 12 VAC Transformers
- 240 x 120 VAC to 32 x 16 VAC Transformers
Buck-boost transformers are designed to maximize the
performance and life of electrical equipment. They are typically
used to power loads with specific voltage requirements that differ
from the available line voltage. A single buck-boost transformer
is used to boost or buck single-phase voltage. Two or three units
are required to boost or buck three-phase voltage. Buck-boost
transformers can be connected as auto-transformers or isolated
transformers.
- When connected as an auto-transformer,
these buck-boost transformers provide a means of raising
(boosting) or lowering (bucking) a supply line voltage by a small
amount (usually no more than 20 percent).
- When connected as an isolation transformer,
these power transformers can be used to step-down supply power to low voltage circuits
at the nameplate rating listed.
Features
- Encapsulated with electrical grade resin
- Cores of high-quality electrical steel
- Aluminum/copper windings (see nameplate for product
specific information)
- 60 Hz operation
- NEMA 3R-rated enclosures
- 135ºC temperature rise, 180°C insulation class or
95°C temperature rise, 130°C insulation class depending
on kVA size
- Heat-cured ASA-61 gray powder coat finish
- Slotted mounting holes for quick and easy mounting
- Permanently affixed wiring diagram
- 10-year limited warranty (limited to mfg. defects)
- Single-phase encapsulated isolation transformer ratings
50VA to 2kVA
- Ambient temperature 0 - 25°C (32 - 77°F)
(Per UL506, UL5085-1, 2 General Purpose Transformers)
Applications
- Air conditioners
- Heating elements
- Motor applications (not motor control circuits per NFPA
79 9.1.1.1)
- 277 volt supply for lighting systems
- Single-phase connections - require one transformer
- Three-phase open delta connections - require two
transformers
- Three-phase wye delta connections - require three
transformers
Note: Buck-boost transformers do not compensate
for fluctuating line voltages. They should only be used when line voltage is relatively
constant.
Standards/Approvals
- Built in accordance with UL1446, CAN/CSA - C22.2 No. 0
- Agency Approval UL File #E4466