Eaton N48M28F55A Transformer - UL Listed, K-13
Part Number: N48M28F55A
Quick Summary
The Eaton N48M28F55A transformer provides robust power conditioning for heavy, harmonics-heavy industrial systems. This K-Factor nonlinear ventilated design helps manage heat and waveform distortion where space and reliability matter most. UL Listed safety certification supports electrical installations, reinforcing compliance in critical facilities. With a 500 kVA rating, primary 480 V and secondary 208Y/120 V, the unit combines durability with installation flexibility, including WS36 weather shield compatibility and aluminum windings for weight-conscious handling. For engineers and procurement teams, this translates to predictable performance, reduced maintenance, and smoother project execution across harsh or outdoor environments.
Product Information
Extended Description
N48M28F55A 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, 115°C, 500 kVA , Al windings, Elec. Shield, Frame: 922, uses WS36
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28F55A
UPC
786680360855
Product Length/Depth
42.65 in
Product Height
90 in
Product Width
69.26 in
Product Weight
4541 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
Catalog Notes
Model A
Coil material
Aluminum
Type
Ventilated transformer
Design
K-13
Frame
922
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
500 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
115 °C rise
Special features
Electrostatically Shielded
Weathershield
WS36
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28F55A
Feature → Business Impact → Application: K-Factor nonlinear ventilated transformer design improves harmonic tolerance and heat dissipation, reducing the risk of overheating in high-load environments and extending asset life. This enables reliable operation for equipment with nonlinear loads such as drives and servo systems in manufacturing lines. Feature → Business Impact → Application: 500 kVA, three-phase, 60 Hz rating supports large loads without parallel units, lowering footprint and lifecycle costs while simplifying distribution in motors and process equipment. Feature → Business Impact → Application: 480 V primary / 208Y/120 V secondary allows direct integration with common distribution panels and MCCs, shortening installation time and improving voltage consistency in plant-wide deployments. Feature → Business Impact → Application: Tap changes (+2.5% FCAN, -2.5% FCBN) provide precise voltage regulation under supply fluctuations, reducing equipment stress and improving process stability. Feature → Business Impact → Application: Aluminum windings with electrostatic shield reduce weight and EMI, lowering installation labor and protecting sensitive controls in EMI-rich environments. Feature → Business Impact → Application: Frame 922 and WS36 weathershield enable outdoor-ready or harsh-environment installs, delivering reliable performance in outdoor substations and exposed mounts while minimizing protective enclosure costs. Feature → Business Impact → Application: UL Listed certification plus Eaton warranty coverage reduce risk and support fast compliance audits, with service terms aligned to standard maintenance cycles across industrial sites.
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FAQs
The N48M28F55A is designed for large, harmonics-rich loads common in manufacturing, processing facilities, and other heavy power environments. It supports a three-phase 480 V input and 208Y/120 V secondary, enabling direct integration with standard distribution equipment. Its ventilated design enhances cooling for continuous operation under demanding conditions.
K-Factor nonlinear refers to a transformer’s ability to tolerate harmonic currents without excessive heat rise or voltage distortion. This unit’s K-13 design and ventilated construction help maintain output quality under harmonic stress, improving reliability for drives, switchgear, and other nonlinear loads while reducing the likelihood of overheating and insulation wear.
Yes. The N48M28F55A provides taps at +2.5% FCAN and -2.5% FCBN. This enables fine voltage regulation to compensate for supply fluctuations or long feeder runs, helping maintain stable secondary voltage for sensitive equipment and reducing process variance.
The transformer is UL Listed, indicating compliance with recognized electrical safety standards for industrial equipment. This certification supports safer installations, smoother commissioning, and faster acceptance by regulatory audits or customer qualification processes, reducing project risk and downtime.
Eaton’s policy 25-000 provides a one-year warranty from installation or 18 months from shipment, whichever comes first. This coverage supports rapid replacement or repair of defects, helping achieve lower total cost of ownership and more predictable long-term maintenance budgeting.