Product Description
V48M28T4516 from Eaton is a general purpose, energy-efficient ventilated dry-type transformer with aluminum windings in a rugged NEMA 2 indoor enclosure. This 45 kVA, 3-phase unit steps 480V delta down to 208Y/120V, making it a versatile choice for panelboards and mixed 208/120V loads in commercial and light industrial facilities.
Catalog #: V48M28T4516
kVA: 45 kVA
Primary: 480V Δ
Secondary: 208Y/120V
Phase / Freq: 3-phase, 60 Hz
Temperature Rise: 150 °C (220 °C insulation)
Sound Level: NEMA ST-20
Taps: 2 × +2.5%, 4 × −2.5%
Enclosure: NEMA 2, ventilated
Mounting: Floor or wall, upright only
Size (H×W×D): 36.88" × 24.88" × 21.13"
Weight: 436 lb
Perk: Free shipping on orders over $250
Product Benefits
- Flexible 208Y/120V secondary supports both 208V three-phase and 120V single-phase branch loads from one transformer.
- Energy-efficient design meets DOE 2016 requirements to help reduce operating costs.
- Quiet operation with NEMA ST-20 sound performance for occupant-friendly installs.
- Rugged indoor construction—ventilated NEMA 2 enclosure with aluminum windings for dependable service.
Key Features
- 45 kVA, 3-phase for commercial/light-industrial distribution.
- Aluminum windings with 220 °C insulation and 150 °C rise.
- Voltage adjustment taps: 2 at +2.5% and 4 at −2.5%.
- Floor or wall mounting, upright only; FR940 frame.
- UL Listed; compliant with 10 CFR Part 431 (2016).
Specifications
Technical Specs
| Type | Energy-efficient ventilated dry-type transformer |
| kVA Rating | 45 kVA |
| Phase / Frequency | 3-phase / 60 Hz |
| Primary Voltage | 480V delta |
| Secondary Voltage | 208Y/120V |
| Sound Level | NEMA ST-20 |
| Taps | 2 at +2.5%, 4 at −2.5% |
Physical Specs
| Enclosure | NEMA 2, ventilated |
| Windings | Aluminum |
| Frame | FR940 |
| Mounting | Floor or wall, upright only |
| Dimensions (H×W×D) | 36.88 in × 24.88 in × 21.13 in |
| Weight | 436 lb |
| Optional Weathershield | WS58 |
Performance & Compliance
| Temperature Rise | 150 °C (220 °C insulation system) |
| Efficiency | DOE 2016 compliant (10 CFR Part 431) |
| Certification | UL Listed |
| UPC | 786680147531 |
| Warranty | 1 year from installation or 18 months from shipment |
| Wiring Connection | 280B |
Application Examples
- Step-down from 480V distribution to 208Y/120V for lighting and receptacle panels.
- Commercial campuses, schools, and retail where quiet operation and code-compliant efficiency are desired.
- Shops and warehouses supplying mixed 208V and 120V loads from a single transformer.
- Projects needing fine voltage correction via ±2.5% taps.
Installation Tips
- Mount upright only with clear ventilation space on all sides; follow NEC and local codes.
- Select primary tap settings to match measured feeder voltage before energizing.
- Bond and ground per code; land neutrals correctly when serving 120V branch circuits.
- Use indoors (NEMA 2); specify optional WS58 weathershield only if needed by conditions.
Frequently Asked Questions
Q: What are the input and output voltages?
The primary is 480V delta and the secondary is 208Y/120V for three-phase and 120V loads.
Q: Is it indoor or outdoor rated?
It ships in a ventilated NEMA 2 indoor enclosure.
Q: Does it meet current efficiency standards?
Yes, it meets DOE 2016 (10 CFR Part 431) efficiency requirements.
Q: What are the tap settings?
There are 2 at +2.5% and 4 at −2.5% to correct feeder voltage.
Q: How loud is it?
It conforms to NEMA ST-20 sound limits for dry-type transformers.
Q: What are the dimensions and weight?
Approximately 36.88 in × 24.88 in × 21.13 in and 436 lb.
Q: What is the warranty?
1 year from installation or 18 months from shipment, whichever comes first.
