Eaton N48M31T12 K-Factor Nonlinear Transformer - UL Listed
Part Number: N48M31T12
Quick Summary
The Eaton N48M31T12 K-Factor nonlinear ventilated transformer provides optimized harmonic mitigation for three-phase industrial power systems. Engineers often struggle with maintaining power quality while guarding sensitive equipment against harmonic distortion and voltage sags. It carries UL Listed safety certification, aligning with North American industrial standards for safe operation. For OEMs and maintenance teams, its rugged frame, WS19 weather shield, and adjustable taps deliver reliable performance with reduced downtime and lifecycle costs. The 45 kVA rating, 480 V to 220Y/127 V outputs, and aluminum windings support easy integration into existing power distribution schemes. Additionally, its 60 Hz operation and 150°C rise capability ensure resilience under demanding industrial loads.
Product Information
Extended Description
N48M31T12 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: 220Y/127V, 150°C, 45 kVA, Al windings, Elec. Shield, Frame: 916A, uses WS19
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M31T12
UPC
786680063640
Product Length/Depth
23.42 in
Product Height
48.56 in
Product Width
28.22 in
Product Weight
913 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
45 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
220Y/127 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Weathershield
WS19
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M31T12
Feature: K-13 design provides nonlinear harmonic mitigation. Business Impact: Improves power quality, protects downstream equipment, and reduces EMI; Application: drives, PLCs, and mixed-load facilities benefit from cleaner voltage and extended equipment life. In practice, users see fewer nuisance trips and longer service intervals. Feature: Ventilated construction in frame 916A with aluminum windings. Business Impact: Efficient cooling, lower temperature rise in high-load conditions, and robust insulation; Application: data centers and manufacturing cells where ambient temperatures fluctuate. Feature: Electrostatic shield and WS19 Weathershield. Business Impact: EMI containment and weather protection translate to safer outdoor installations; Application: outdoor substations and exposed-wide-area equipment. Feature: Adjustable taps (+2.5% FCAN, -2.5% FCBN). Business Impact: Voltage regulation supports site variations without replacing gear; Application: sites with fluctuating supply or long feeder runs. Feature: 60 Hz, 480 V primary to 220Y/127 V secondary, 45 kVA, three-phase. Business Impact: Reliable power delivery for critical loads with proven standardization; Application: manufacturing lines and automation networks.
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FAQs
Installation should begin by verifying 480 V primary and 220Y/127 V secondary connections on the N48M31T12. Mount to a stable base using the 916A frame and ensure adequate ventilation around the ventilated core. Plan for lifting due to a heavy 913 lb weight and provide clearances for future maintenance, labeling, and accessible tap adjustments.
The K-Factor nonlinear design, designated K-13 in this unit, mitigates harmonic currents by shaping flux and limiting peak voltage distortion, protecting downstream equipment such as drives and PLCs. This results in improved power quality, reduced EMI, and longer service life for connected loads, especially in systems with heavy motor loads and variable frequency drives.
Yes, with the WS19 weather shield and rugged aluminum windings, the N48M31T12 is suited for exposed environments common in outdoor substations and manufacturing yards. While it is a ventilated transformer needing ventilation, the WS19 shield helps resist weather ingress, and the 150°C rise rating supports operation under elevated ambient temperatures when properly mounted.
This unit is a three-phase 45 kVA transformer with a 480 V primary and a 220Y/127 V secondary, rated for 60 Hz operation. It features taps at +2.5% FCAN and -2.5% FCBN to accommodate voltage variations, and aluminum windings with an electrostatic shield for improved insulation and safety.
Eaton backs this transformer with a one-year warranty from installation or eighteen months from shipment, whichever occurs first. It carries UL Listed certification and accompanying datasheets, with catalogs and videos available to assist commissioning and ongoing maintenance. Technical support and spare parts are typically accessible through Eaton's distributed network. Customers can contact regional reps for tailored service agreements and part availability.