Eaton N48M28B33CU Transformer - UL Listed K-13
Part Number: N48M28B33CU
Quick Summary
The Eaton N48M28B33CU Transformer provides high-capacity nonlinear K‑Factor isolation for three‑phase power systems. Engineers often struggle with harmonic distortion, protection coordination, and space constraints in demanding facilities; this model addresses those challenges. UL Listed certification anchors safety and reliability, while its K‑13 design and electrostatic shielding enhance fault tolerance and EMI control. With copper windings, a 300 kVA rating, and a rugged ventilated frame, it supports scalable power distribution and easier maintenance for mission-critical operations in data centers and industrial plants. This combination of performance and protection delivers tangible business value by reducing downtime and ensuring compliant, resilient power distribution.
Product Information
Extended Description
N48M28B33CU 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, 80°C, 300 kVA , Cu windings, Elec. Shield
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28B33CU
UPC
786680105821
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
3932 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
919
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
80 °C rise
Special features
Electrostatically Shielded
Weathershield
WS35
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28B33CU
Feature The K‑Factor nonlinear design reduces harmonic distortion and improves protection coordination. Benefit This translates to fewer nuisance trips, better load sharing, and safer operation for sensitive equipment. Application Data centers, manufacturing lines, and process plants needing reliable harmonic control. Feature Copper windings and robust copper conductors offer superior conductivity and thermal performance. Benefit Higher current capacity with lower copper losses under load, extending transformer life and reducing cooling requirements. Application Continuous operation in demanding environments. Feature 300 kVA rating provides ample headroom for growth and peak loads. Benefit Enables scalable distribution without over-sizing, improving capital efficiency and reducing system downtime. Application Substations, plant feeders, and critical load circuits. Feature Primary 480 V / Secondary 208Y/120 V configuration simplifies integration with existing electrical infrastructures. Benefit Streamlined installation and compatibility with common plant equipment, reducing durarion and wiring complexity. Application New builds and retrofits in mixed-voltage environments. Feature Tap size options 2 at +2.5% FCAN and 4 at -2.5% FCBN for voltage regulation under varying loads. Benefit Maintains voltage stability for sensitive equipment and optimizes performance during transient events. Application Critical processes and data center power rails. Feature Electrostatic shielding and WS35 Weathershield enclosure enhance EMI control and outdoor durability. Benefit Improved protection against external interference and weather exposure, extending service life in harsh environments. Application Outdoor installations or facilities with high EMI concerns. Feature UL Listed certification and Frame 919 construction with 80°C rise indicate safety and ruggedness. Benefit Compliance with safety standards and reliable operation under elevated temperature, reducing maintenance risk. Application Industrial facilities and service centers requiring regulatory alignment.
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FAQs
What mounting, clearance, and wiring steps are recommended? The unit uses a heavy 919 frame and copper windings, with a 36.23 inch depth, 44.2 inch width, and 75 inch height. Plan for outdoor or indoor installation with the WS35 weather shield if exposed to the elements, ensure adequate ventilation, proper rack or pad mounting, and space for cable connections to 480 V primary and 208Y/120 V secondary.
Key specs include a 300 kVA rating, three-phase configuration, 60 Hz, primary voltage of 480 V, secondary 208Y/120 V, copper windings, and an 80 °C temperature rise. It incorporates K‑Factor nonlinear design (K‑13) and electrostatic shielding for EMI control, with a 25-000 warranty framework from Eaton.
Yes. Its K‑Factor nonlinear design mitigates harmonics common in data centers and industrial loads, while the electrostatic shielding and WS35 weather shield provide robust EMI control and weather resistance. The UL Listed certification supports safety compliance in mission-critical facilities.
The product is UL Listed, confirming compliance with safety and performance requirements. While other certifications aren’t listed in the data provided, UL Listing is a strong indicator of regulatory alignment for electrical equipment used in commercial and industrial settings.
The transformer’s rugged ventilated design, copper windings, and shielding reduce overheating and EMI-related issues, lowering downtime and maintenance frequency. Its 300 kVA rating offers scalable headroom for load growth, helping optimize capital expenditure and protect against future service interruptions.