Documents
3.81 kVA Step-Down Buck-Boost Transformer, 240V → 220V, 10A, Three Phase
$582.34
3.81 kVA three-phase buck-boost that bucks 240V to 220V (8% correction) at 10A. Encapsulated NEMA 3R, cETLus listed. In-stock ships same business day.
✔ In Stock: 6
Specifications
| Brand | Sanzo Sales |
| Phase | Three Phase (3-PH), Delta |
| Capacity | 3.81 kVA |
| Primary Voltage | 240V |
| Primary Amperage | 9.17A |
| Secondary Voltage | 220V |
| Secondary Amperage | 10A |
| Maximum Primary OCP | 15A |
| Frequency | 50/60 Hz |
| Insulation | 180°C |
| Temperature Rise | 115°C |
| Transformer Type | Buck/Boost |
| Part # | TX-BB-240D-220D-10A |
| Configuration | Encapsulated Autotransformer |
| Primary Termination | Lead Wires & Terminal Lugs |
| Secondary Termination | Lead Wires & Terminal Lugs |
| Termination Access | (6) ¾" NPT Hubs |
| Winding Material | Aluminum |
| Enclosure Material | Steel |
| Finish Color | ANSI 70 Light Grey |
| Weatherproof Rating | NEMA 3R |
| Certification Listing | cETLus |
| Dimensions (W×H×D) | 9.25 × 7.25 × 5.75 in |
| Weight | 24 lb |
Product Description
The TX-BB-240D-220D-10A is a 3.81 kVA three-phase buck-boost transformer that bucks a 240V supply to 220V — an 8% voltage correction — bringing 220V-rated equipment back into its proper operating range. Wired as an encapsulated buck transformer (autotransformer), it carries only the correction portion of the load, so this unit corrects a much larger connected load: up to 10A at 220V (3.81 kVA usable line capacity).
Resin-encapsulated in a NEMA 3R steel enclosure (ANSI 70 light grey) for indoor or outdoor mounting at the disconnect. Lead wires and terminal lugs, aluminum windings, 180°C insulation system, 115°C rise, 50/60 Hz, cETLus listed. Supplied as a two-unit open-delta bank for three-phase delta service. In-stock units ship the same business day.