Eaton N48M28B22EELS50 K-Factor Transformer - UL Listed
Part Number: N48M28B22EELS50
Quick Summary
The Eaton N48M28B22EELS50 K-Factor nonlinear ventilated transformer serves three-phase power distribution. Engineers often wrestle with heat, noise, and efficiency in high-kVA installations. It is UL Listed and NEMA TP-1 compliant, with NEMA TP-1 efficiency and a low 50 dB sound profile for sensitive environments. This rugged, space-conscious design delivers reliable distribution, reduced maintenance costs, and scalable voltage control for facilities ranging from data centers to manufacturing floors. Taps for ±2.5% voltage adjustment support site-level variations, while the aluminum windings and 80 °C rise specification ensure performance under demanding conditions.
Product Information
Extended Description
N48M28B22EELS50 Eaton: Eaton K-Factor nonlinear ventilated transformer, KT-13 (3-phase), PV 480V, Taps: 2 at +2.5% /4 at -2.5%, SV 208Y/120V, 80°C rise, 225 kVA, EE, LS, 50
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28B22EELS50
UPC
786680080449
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
3105 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Compliances
NEMA TP-1 Compliant
Certifications
UL Listed
Catalog Notes
Nema TP-1 efficient, Low sound equal to 50 dB
Coil material
Aluminum
Frame
920E
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Volt ampere rating
225 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208 Y/120 V
Temperature rise
80 °C rise
Modification 1
Low sound 50 dB
Special features
Electrostatically Shielded
Weathershield
WS35
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28B22EELS50
The 225 kVA three-phase rating provides solid headroom for heavy industrial loads, reducing the risk of voltage sag during peak demand and enabling reliable process control. This translates to improved equipment uptime and lower replacement costs in data centers, manufacturing lines, and large facilities. The 480 V primary / 208Y/120 V secondary configuration aligns with standard industrial power architectures, easing integration with existing switchgear and motor control centers while supporting downstream equipment compatibility. Voltage taps at 2 at +2.5% and 4 at -2.5% enable precise on-site voltage regulation to compensate for feed variations, improving performance for sensitive loads and reducing nuisance trips. The low sound profile of 50 dB and electrostatic shielding address noise-sensitive environments and EMI concerns, facilitating compliance with noise and safety requirements in labs, hospitals, and commercial spaces. Weathershield WS35 and aluminum windings enhance outdoor suitability and long-term durability, lowering maintenance and replacement costs. Frame 920E with a substantial weight and robust construction provides mechanical rigidity, vibration resistance, and stable operation in harsh conditions, supporting installation in spaces with limited access or demanding mounting constraints. Compliance with NEMA TP-1 and UL Listed certification ensures regulatory alignment and third-party verification of performance, efficiency, and safety. The overall package supports scalable power distribution, predictable energy losses, and simplified procurement for large-scale projects in mining, steel, and pharmaceutical industries.
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FAQs
This 225 kVA three-phase transformer with a 480 V primary and 208Y/120 V secondary supports industrial power distribution in data centers, manufacturing floors, and large facilities. With a robust frame, WS35 weather shield, and electrostatic shielding, it handles indoor and protected outdoor environments while maintaining voltage stability and reliability under peak loads.
Key specs include a 225 kVA three-phase rating, 480 V primary, 208Y/120 V secondary, 60 Hz operation, 80 °C rise, and voltage taps: 2 at +2.5% and 4 at -2.5%. The unit uses aluminum windings, frame 920E, and meets NEMA TP-1 efficiency and UL Listed qualifications, with a low noise profile of 50 dB.
Yes. The N48M28B22EELS50 is UL Listed and NEMA TP-1 compliant, with notes indicating TP-1 efficiency and a low sound profile. It also features electrostatic shielding and a WS35 weather shield, reinforcing its suitability for regulated environments and challenging installation conditions.
Operators gain improved efficiency under TP-1 guidelines, reduced audible noise to 50 dB, and a durable build suitable for long service life. The 225 kVA rating supports scalable power provision, while the ±2.5% tap adjustments minimize voltage disturbances, reducing downtime, improving process stability, and lowering maintenance costs in dynamic load scenarios.
Dimensions are 36.23 in (L) x 75 in (H) x 44.2 in (W) with a weight of 3105 lb. Installations should provide reinforced mounting, adequate clearance for ventilation, and access for maintenance. The 920E frame and aluminum winding contribute to rigidity and reliability in rugged environments, while WS35 weather shielding supports outdoor or semi-outdoor use.