Eaton N48M28B49CU K-Factor Nonlinear Transformer - UL Listed
Part Number: N48M28B49CU
Quick Summary
Eaton N48M28B49CU K-Factor nonlinear ventilated transformer provides reliable three-phase power conversion for data centers, manufacturing facilities, and motor-driven systems. Many installations struggle with harmonic distortion, voltage sags, and overheating, which drive unscheduled downtime and maintenance costs. UL Listed safety certification supports code compliance, while copper windings, electrostatic shielding, and a ventilated design help protect critical loads. With 150 kVA capacity, 480 V primary, and 208Y/120 V secondary, it integrates into existing power management architectures, delivering improved voltage regulation and reduced harmonic impact for essential plant loads.
Product Information
Extended Description
N48M28B49CU 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, 80°C, 150 kVA , Cu windings, Elec. Shield, Frame: 917, uses WS34
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28B49CU
UPC
786680105807
Product Length/Depth
24.67 in
Product Height
56.17 in
Product Width
31.44 in
Product Weight
1741 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
917
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
150 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
80 °C rise
Special features
Electrostatically Shielded
Weathershield
WS34
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28B49CU
Feature: K-Factor nonlinear, ventilated design with copper windings and electrostatic shield. Business Impact: Reduces harmonic currents, improves EMI/EMC performance, and minimizes fault propagation, boosting equipment longevity. Application: Suitable for industrial facilities with mixed motor loads and harmonic-rich equipment. Feature: Tap adjustments (2 at +2.5% FCAN, 4 at -2.5% FCBN). Business Impact: Flexible voltage regulation to compensate for supply drift and transformer aging, lowering voltage-related losses. Application: Critical power systems requiring tight regulation in variable grid conditions. Feature: Three-phase, 150 kVA capacity, 480 V primary to 208Y/120 V secondary at 60 Hz. Business Impact: Enables high-load capacity with compact footprint and predictable thermal performance, reducing the need for downstream paralleling. Application: Data centers, process lines, and machine parks that demand consistent power quality. Feature: Ventilated design with WS34 weather shield and frame 917. Business Impact: Improved cooling and enclosure protection, enabling reliable operation in harsh environments and simplifying installation. Application: Outdoor or semi-enclosed plant installations where ambient conditions challenge transformer life. Feature: Electrostatic shielding and copper windings. Business Impact: Enhanced short-circuit protection and EMI suppression, safeguarding critical equipment and reducing maintenance intervals. Application: Facility-wide power management where sensitive drives and controls are present.
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FAQs
Installation should follow the manufacturer’s guidelines for a 150 kVA, three-phase transformer. Ensure frame 917 mounting, WS34 protection, and copper windings are properly secured. Verify 480 V primary and 208Y/120 V secondary wiring, observe proper grounding, and confirm tap settings from +2.5% to -2.5% as required by site voltage fluctuations. Adequate ventilation and clearance around the unit are essential to maintain the 60 Hz operation and 80 °C rise limits.
The transformer uses a 480 V primary voltage and a 208Y/120 V secondary. This configuration supports typical industrial motor drives and distribution needs while maintaining compatibility with standard 60 Hz power systems. The copper-wound design with electrostatic shielding helps minimize EMI and improve reliability for sensitive equipment connected to the 208Y/120 V secondary.
K-Factor nonlinear design optimizes the transformer to handle harmonic currents produced by modern electrical loads, reducing distortion and improving power quality. For facilities with VFDs, servers, or other high-harmonic equipment, this design helps protect upstream equipment, minimizes heating losses, and supports compliant operation under heavy load conditions, especially when combined with copper windings and shielding.
Yes, the N48M28B49CU is UL Listed, confirming adherence to recognized electrical safety standards. Warranty terms follow Eaton’s policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This provides a clear support window for commissioning, commissioning, and initial maintenance, helping you manage risk during the critical early lifecycle phase.
Tap settings include 2 taps at +2.5% FCAN and 4 taps at -2.5% FCBN, enabling voltage adjustments to compensate for supply variations and load conditions. Use the taps to maintain voltage within tight tolerances at the 480 V primary and 208Y/120 V secondary, ensuring steady performance for critical loads and reducing the risk of motor under or over-voltage conditions.