Eaton N48M28T33 Transformer - UL Listed K-Factor
Part Number: N48M28T33
Quick Summary
The Eaton N48M28T33 Transformer is a K-Factor nonlinear ventilated transformer designed for robust three-phase power distribution in industrial facilities. Engineers often struggle with heat, harmonic distortion, and installation constraints; this unit addresses those challenges with a ventilated design and proven shielding. Key certifications include UL Listed safety approval, with weathershield compatibility and high-temperature tolerance to support outdoor or harsh environments. This combination delivers reliable operation, easier compliance, and lower total cost of ownership, while integrating with standard 480 V primary and 208Y/120 V secondary systems. For projects prioritizing reliability, protection against harmonic surge, and long-term performance, the N48M28T33 aligns with modern industrial power management needs and provides clear compatibility benefits for upgrade paths and replacement programs.
Product Information
Extended Description
N48M28T33 Eaton: K-Factor nonlinear ventilated transformer K-13, Three-phase, PV: 480V, Taps: 2 at 0.025 FCAN, 4 at -0.025 FCBN, SV: 208Y/120V, 150°C, 300 kVA, Al windings, Elec. Shield, Frame: 919E
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28T33
UPC
786680036682
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2657 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
Aluminum
Type
Ventilated transformer
Design
K-13
Frame
919E
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
300 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Weathershield
WS35
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28T33
Feature → The transformer uses Aluminum windings and a ventilated design (K-13) to handle high harmonic loads. Business Impact → Superior thermal performance reduces insulation stress and extends service life, lowering maintenance costs in demanding environments. Application → Ideal for facilities with significant harmonic currents, such as drives and PLC networks, where reliability and efficiency matter. Feature → Electrostatic shield and frame 919E construction provide EMI protection and rugged mounting. Business Impact → Enhanced equipment protection and easier integration with existing grounded systems, minimizing interference with sensitive controls. Application → Data centers and process plants requiring EMI containment and durable mounting in constrained spaces. Feature → Tap changers (2 at +2.5% FCAN, 4 at -2.5% FCBN) support voltage regulation under load. Business Impact → Improved voltage stability across feeders, reducing equipment stress and performance variability. Application → Critical installations with fluctuating loads or long feeders. Feature → Weathershield WS35 option enables outdoor installation without enclosure penalties. Business Impact → Faster deployment and reduced enclosure costs in outdoor or semi-exposed environments. Application → Outdoor substations or exposed equipment rooms in harsh climates. Feature → 300 kVA, three-phase, 480 V to 208Y/120 V with 60 Hz rating delivers scalable power with precise voltage conversion. Business Impact → Aligns with standard industrial power architectures, enabling straightforward integration and future expansion. Application → Manufacturing lines, packaging systems, and control panels requiring dependable step-down power. Feature → UL Listed certification ensures compliance with safety standards and supplier reliability. Business Impact → Streamlined procurement, reduced risk during audits, and faster project sign-off. Application → Projects prioritizing formal safety approvals and standardized sourcing.
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FAQs
Yes. The N48M28T33 is designed for 480 V three-phase input with a 208Y/120 V output. It uses standard 60 Hz operation and a 919E frame for compatibility with common industrial mains. Its 2 at +2.5% FCAN and 4 at -2.5% FCBN taps provide voltage regulation under varying loads, simplifying retrofit or expansion projects.
Key specs include 300 kVA rating, primary voltage 480 V, secondary voltage 208Y/120 V, three-phase, 60 Hz, aluminum windings, electrostatic shield, and a 150 °C temperature rise. It supports voltage taps for regulation, and is built in the 919E frame with Weathershield WS35 option for outdoor use.
The K-Factor nonlinear design is tailored for systems with significant harmonic content, mitigating additional heating and insulation stress. This results in improved voltage stability and reduced energy waste, making it well-suited for facilities with heavy motor loads, drives, and Other nonlinear equipment that create distortion.
The N48M28T33 carries Eaton’s standard warranty: one year from installation or eighteen months from shipment, whichever occurs first. Eaton also provides technical support and access to datasheets and catalog information. Customers benefit from documented safety compliance and access to replacement parts aligned with the UL Listed design.
WS35 weather shield enables outdoor installation without additional enclosures, reducing setup time and costs. The electrostatic shield minimizes EMI and stray capacitance between windings and enclosure, protecting sensitive controls and improving overall system reliability in harsh industrial environments.