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10.81 kVA Step-Up Buck-Boost Transformer (Booster), 189V → 208V, 30A, Three Phase
$923.32
10.81 kVA three-phase buck-boost booster that boosts 189V to 208V (10% correction) at 30A. 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 | 10.81 kVA |
| Primary Voltage | 189V |
| Primary Amperage | 33A |
| Secondary Voltage | 208V |
| Secondary Amperage | 30A |
| Maximum Primary OCP | 45A |
| Frequency | 50/60 Hz |
| Insulation | 180°C |
| Temperature Rise | 115°C |
| Transformer Type | Buck/Boost |
| Part # | TX-BB-189D-208D-30A |
| 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) | 10.25 × 9.25 × 4.75 in |
| Weight | 44 lb |
Product Description
The TX-BB-189D-208D-30A is a 10.81 kVA three-phase buck-boost transformer that boosts a 189V supply to 208V — a 10% voltage correction — bringing 208V-rated equipment back into its proper operating range. Wired as an encapsulated booster transformer (autotransformer), it carries only the correction portion of the load, so this unit corrects a much larger connected load: up to 30A at 208V (10.81 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.