Eaton N48M28T22CU Three-Phase Transformer - UL Listed
Part Number: N48M28T22CU
Quick Summary
Eaton N48M28T22CU is a three-phase K-Factor nonlinear ventilated transformer designed for industrial power distribution. Engineers often contend with harmonics and heat in compact switchgear, and this unit helps by reducing harmonic stress and limiting temperature rise. Key certifications include UL Listed safety certification, with Eaton’s warranty policy documentation supporting service continuity. The design combines copper windings, electrostatic shielding, and WS37 weather shielding in a 225 kVA package rated at 480 V primary and 208Y/120 V secondary. It also offers precise voltage taps and a robust frame (923) to fit demanding installations, making it suitable for data centers, manufacturing lines, and critical plant infrastructure.
Product Information
Extended Description
N48M28T22CU Eaton: K-Factor Non Linear Transformer, Ventilated, K-13, Three-phase, PV: 480V, Taps: 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 208Y/120V, 150°C, 225 kVA , Cu windings, Elec. Shield, Frame: 923, uses WS37
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28T22CU
UPC
786680105364
Product Length/Depth
32.65 in
Product Height
57.54 in
Product Width
36.69 in
Product Weight
1935 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.
Certifications
UL Listed
Coil material
Copper
Type
Ventilated transformer
Design
K-13
Frame
923
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
225 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Weathershield
WS37
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28T22CU
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: K-Factor nonlinear design targets harmonic currents to reduce losses and overheating. Benefit: improved efficiency and longer equipment life, lowering total cost of ownership in facilities with non-linear loads. Application: ideal for high-harmonic environments like CNC machines, VFD-driven conveyors, and data-center power plants. Feature: Three-phase 225 kVA rating with 480 V primary and 208Y/120 V secondary. Benefit: scalable headroom for expanding electrical loads and streamlined panel integration, reducing the need for multiple step-down transformers. Application: motor control centers, industrial substations, and distributed power networks. Feature: Copper windings and electrostatic shielding. Benefit: higher electrical conductivity, better heat dissipation, and EMI suppression, improving protection for sensitive equipment. Application: clean power supply to sensitive electronics and control systems. Feature: Ventilated design with a 150°C rise rating and WS37 weathershield. Benefit: enhanced cooling and protection in harsh environments, enabling outdoor or semi-outdoor installations with extended service life. Application: outdoor switchgear, outdoor substations, and manufacturing floors with ambient exposure. Feature: Voltage taps at 2 at +2.5% FCAN and 4 at -2.5% FCBN. Benefit: precise voltage regulation to accommodate site variations and supply fluctuations without compromising performance. Application: installations across varying utility voltages and integration with nearby equipment relying on stable secondary voltage. Feature: Frame 923 for compatibility with standard mounting footprints. Benefit: easier integration into existing enclosures and supports mechanical interchangeability in retrofit projects. Application: retrofits and new build-outs in industrial facilities. Additional context: The combination of copper windings, electrostatic shielding, WS37 protection, and a clearly defined tap set enables predictability in performance, simplifying commissioning, maintenance planning, and long-term reliability for mission-critical processes.
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FAQs
When installing the N48M28T22CU, ensure adequate clearance for its 1935 lb weight and the 32.65 in depth, with a 57.54 in height and 36.69 in width footprint. Use frame 923 mounting provisions, provide proper ventilation for the 150°C rise rating, and verify primary 480 V and secondary 208Y/120 V connections. Plan for tap changes at +2.5% and -2.5% to accommodate site voltage variation.
The K-Factor nonlinear design limits harmonic currents by optimizing winding and cooling characteristics, reducing circulating losses and overheating in non-linear load conditions. This translates to improved energy efficiency, lower maintenance, and longer equipment life, especially in drives, reactors, and power supplies that draw distorted currents. It aligns with typical industrial power quality requirements.
Yes. The WS37 weathershield is listed as a special feature for this transformer, enabling outdoor or harsh-environment installations. The electrostatic shielding enhances EMI control, while the ventilated design supports heat dissipation in exposed locations. Ensure proper enclosure and clearance per installation guidelines to maximize protection and longevity.
The transformer provides two taps at +2.5% FCAN and four taps at -2.5% FCBN to accommodate site voltage variations. During commissioning, select the closest tap setting to the observed supply voltage to maintain secondary voltage within tolerance. Recheck after installation and during any significant supply changes to avoid over/under-voltage stress on downstream equipment.
The unit is covered under Eaton’s Selling Policy 25-000, offering a one-year warranty from the date of installation or eighteen months from shipment, whichever occurs first. UL Listed certification supports safety compliance, and Eaton provides access to specification sheets and warranty documentation to support commissioning and ongoing maintenance planning.