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12 kVA Step-Down Buck-Boost Transformer, 490V → 445V, 15.57A, Three Phase
$1,315.90
12 kVA three-phase buck-boost that bucks 490V to 445V (9% correction) at 15.57A. Encapsulated NEMA 3R, cETLus listed. In-stock ships same business day.
✔ In Stock: 3
Specifications
| Brand | Sanzo Sales |
| Phase | Three Phase (3-PH), Delta |
| Capacity | 12 kVA |
| Primary Voltage | 490V |
| Primary Amperage | 14.14A |
| Secondary Voltage | 445V |
| Secondary Amperage | 15.57A |
| Maximum Primary OCP | 20A |
| Frequency | 50/60 Hz |
| Insulation | 180°C |
| Temperature Rise | 115°C |
| Transformer Type | Buck/Boost |
| Part # | TX-BB-490D-445D-12KVA |
| 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) | 5.43 × 10.08 × 4.49 in |
| Weight | 44 lb |
Product Description
The TX-BB-490D-445D-12KVA is a 12 kVA three-phase buck-boost transformer that bucks a 490V supply to 445V — a 9% voltage correction — bringing 445V-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 15.57A at 445V (12 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.