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3.6 kVA Step-Down Buck-Boost Transformer, 277V → 240V, 15A, Single Phase
BBT Model 1 Rear
BBT Model 1 Side
BBT Model 1 wireway
BBT Model 1 Interior

Documents

PDF TX-BB-277V-240V-15A — Spec SheetPDF TX-BB-277V-240V-15A — Dimensional DrawingPDF TX-BB-277V-240V-15A — Wiring DiagramPDF Buck-Boost Transformer OverviewPDF Why Buck-Boost Explanation Guide

3.6 kVA Step-Down Buck-Boost Transformer, 277V → 240V, 15A, Single Phase

by Sanzo Sales · Part # TX-BB-277V-240V-15A

$380.05

3.6 kVA single-phase buck-boost that bucks 277V to 240V (13% correction) at 15A. Encapsulated NEMA 3R, cETLus listed. In-stock ships same business day.

Full specifications ↓

✔ In Stock: 20

Specifications

BrandSanzo Sales
PhaseSingle Phase (1-PH), AC
Capacity3.6 kVA
Primary Voltage277V
Primary Amperage13A
Secondary Voltage240V
Secondary Amperage15A
Maximum Primary OCP20A
Frequency50/60 Hz
Insulation180°C
Temperature Rise115°C
Transformer TypeBuck/Boost
Part #TX-BB-277V-240V-15A
ConfigurationEncapsulated Autotransformer
Primary TerminationLead Wires & Terminal Lugs
Secondary TerminationLead Wires & Terminal Lugs
Termination Access(6) ¾" NPT Hubs
Winding MaterialAluminum
Enclosure MaterialSteel
Finish ColorANSI 70 Light Grey
Weatherproof RatingNEMA 3R
Certification ListingcETLus
Dimensions (W×H×D)4.65 × 9.25 × 3.86 in
Weight17 lb

Product Description

The TX-BB-277V-240V-15A is a 3.6 kVA single-phase buck-boost transformer that bucks a 277V supply to 240V — a 13% voltage correction — bringing 240V-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 15A at 240V (3.6 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. Use two units in open-delta for three-phase delta systems, three for wye. In-stock units ship the same business day.