Eaton N48M28F75 Ventilated Transformer - UL Listed
Part Number: N48M28F75
Quick Summary
N48M28F75 is a K-Factor nonlinear ventilated transformer designed for three-phase power distribution in mid-sized data centers, manufacturing plants, and process facilities. Engineers frequently wrestle with harmonics, voltage regulation, and thermal limits, especially in installations with varying loads or limited cooling. UL Listed safety certification provides assurance for safe field commissioning, while the K-13 ventilated design helps manage heat under real-world duty cycles. This package also features aluminum windings, a robust 75 kVA rating, 480 V primary, and 208Y/120 V secondary, with optional WS19 weather shielding. For projects requiring reliability, efficient heat management, and scalable power transformation, N48M28F75 delivers proven value.
Product Information
Extended Description
N48M28F75 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, 115°C, 75 kVA, Al windings, Elec. Shield, Frame: 916A
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28F75
UPC
786680036286
Product Length/Depth
23.42 in
Product Height
48.56 in
Product Width
28.22 in
Product Weight
723 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
916A
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
75 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
115 °C rise
Special features
Electrostatically Shielded
Weathershield
WS19
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28F75
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: K-Factor nonlinear ventilated transformer with a K-13 design. Business Impact: It tolerates harmonic currents while maintaining a regulated temperature rise, reducing insulation stress and the likelihood of derating under heavy non-linear loading. Application: This makes it ideal for data centers, metal fabrication lines, chemical processing facilities, and other operations where stable voltage and cooling matter for uptime and productivity. Feature: Tap-changer options include 2 taps at +2.5% FCAN and 4 taps at -2.5% FCBN. Business Impact: Enables precise voltage regulation on the 480 V primary and 208Y/120 V secondary, protecting sensors, PLCs, and motors while reducing nuisance trips. Application: Particularly beneficial for installations with long feeders, voltage dips, or frequent switching events in manufacturing floors and data-center infrastructure. Feature: Aluminum windings and an electrostatic shield. Business Impact: These windings reduce weight and material cost while enhancing EMI/EMC performance, contributing to cooler operation and longer insulation life. Application: Outdoor installations or EMI-sensitive environments where maintenance budgets limit cathodic protection and filter requirements. Feature: Frame 916A and WS19 weather shield option. Business Impact: Provides a compact footprint compatible with standard enclosures and improves outdoor durability, cutting installation time and external enclosure requirements. Application: Retrofit projects and new builds requiring weather resistance and space efficiency in industrial settings. Feature: 75 kVA rating with 480 V primary and 208Y/120 V secondary at 60 Hz three-phase. Business Impact: Aligns with common industrial power distribution schemes, delivering reliable step-down power with robust voltage regulation for panels, switchgear, and bus systems. Application: Manufacturing lines, data centers, and process industries seeking scalable, robust power transformation with predictable losses. Feature: UL Listed certification and Eaton warranty provide safety assurance and predictable service costs. Business Impact: Ensures safety compliance and predictable maintenance costs, with Eaton’s warranty policy covering installation through early service life. Application: Procurement, commissioning, and long-term asset management for OEMs, integrators, and distributors.
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FAQs
N48M28F75 with WS19 is designed for both indoor and outdoor applications, featuring a frame 916A and 48.56 inch height to fit common plant spaces. Ensure adequate clearance for ventilation and access for maintenance. The 75 kVA rating and 480 V primary require compatible switchgear, wiring, and enclosure protection as part of standard UL Listed installation practices.
The transformer employs a K-Factor nonlinear design (K-13), which improves tolerance to harmonic currents and manages heat more effectively. This reduces insulation stress and the risk of premature derating in facilities with non-linear loads. It is well-suited for data centers, metalworking, and other environments with significant harmonic content.
Yes. The N48M28F75 supports outdoor use when equipped with the WS19 weather shield and proper enclosure protection. Its aluminum windings, ventilated design, and weather-resistant features help withstand harsh environments, while maintaining efficient cooling. Always verify installation clearances and follow manufacturer guidelines for outdoor ratings and disconnect positioning.
This transformer is UL Listed, providing a recognized safety certification for field installation and operation. UL Listing simplifies compliance during procurement and commissioning, particularly in regulated industries. Note that regional requirements may call for additional certifications; evaluate local codes and customer specifications to determine if CE, IP ratings, or SIL certifications are required for your project.
Maintenance requirements are relatively low due to solid 75 kVA performance, aluminum windings, and a robust frame. The electrostatic shield and WS19 option contribute to longer insulation life and reduced EMI issues, potentially lowering downtime. ROI is driven by improved uptime, reduced cooling demands, and predictable warranty coverage (1 year from installation or 18 months from shipment) from Eaton.