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Power Products (Elec... > Transformers > 1-Phase Buck-Boost T... > 240x120 VAC to 24x12 VAC
240x120 VAC to 24x12 VAC
Buck-boost transformers are used to power loads with specific voltage requirements that differ from the available line voltage. These Jefferson Electric NEMA 3R-housed 1-phase units, encapsulated with electrical-grade resin, offer a 240x120 VAC primary to 24x12 VAC secondary configuration in a range of kVA ratings.
Buck-Boost Transformers (NEMA Rated)
- 240x120 VAC to 24x12 VAC
Jefferson Electric Buck-Boost Transformers, Auto-Transformers, Isolation Transformers
240 x 120 VAC to 24 x 12 VAC Buck Boost Transformers
- Ratings: Single phase from 50VA to 2kVA; 60 Hz
- 240x120 VAC primary
- 24x12 VAC secondary
- NEMA 3R rated
- Suitable for use as auto transformer or isolation transformer
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)
Buck-Boost Transformers Overview
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
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