Eaton N44M31B45CU Transformer - UL Listed K-Factor Nonlinear
Part Number: N44M31B45CU
Quick Summary
The Eaton N44M31B45CU transformer delivers K-Factor nonlinear power conditioning for three-phase industrial systems. In practice, engineers face voltage sags, harmonic distortion, and protection coordination when upgrading aging networks. This unit supports 45 kVA capacity with a 440 V primary and 220Y/127 V secondary, and it features taps at +2.5% FCAN and -2.5% FCBN. Its copper windings, electrostatic shield, and ventilated design enable reliable operation at an 80 °C rise in demanding environments. UL Listed certification reinforces compliance for North American facilities, while WS39 weathershield and the 915D frame deliver installation flexibility in harsh conditions. Together, these features translate into reduced downtime, improved energy efficiency, and lower lifecycle costs across power management and distribution applications.
Product Information
Extended Description
N44M31B45CU Eaton: K-Factor Non Linear Transformer, Ventilated, K-13, Three-phase, PV: 440V, Taps: 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 220Y/127V, 80°C, 45 kVA, Cu windings, Elec. Shield, Frame: 915D, uses WS39
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N44M31B45CU
UPC
786680087509
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
605 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
915D
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
440 V
Secondary Voltage
220Y/127 V
Temperature rise
80 °C rise
Special features
Electrostatically Shielded
Weathershield
WS39
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N44M31B45CU
Feature → Business Impact → Application: K-Factor nonlinear three-phase ventilated design mitigates harmonic currents and enhances fault tolerance, improving system reliability and extending equipment life in high-density load centers. This translates to fewer nuisance trips and better protection coordination for critical processes in manufacturing lines and data centers. Feature → Business Impact → Application: 45 kVA rating with a 440 V primary and 220Y/127 V secondary supports medium-scale loads with tight voltage control, enabling compact, efficient power distribution in control panels and machine rooms. Feature → Business Impact → Application: Tap changers at 2 at +2.5% FCAN and 4 at -2.5% FCBN provide precise voltage regulation, reducing the need for downstream regulation devices in sites with input voltage variations. Feature → Business Impact → Application: Copper windings and electrostatic shielding deliver higher efficiency and EMI protection, benefiting sensitive instrumentation and communication systems in automated facilities. Feature → Business Impact → Application: Ventilated cooling with WS39 weather shield improves heat dissipation and environmental resilience, enabling outdoor or harsh-environment installations without sacrificing performance in process plants. Feature → Business Impact → Application: Rugged frame 915D and robust mechanical design simplify installation in standard electrical cabinets, enabling faster commissioning and easier retrofits across power distribution networks. Feature → Business Impact → Application: UL Listed certification and Eaton warranty provide regulatory confidence and predictable service life, reducing risk and total cost of ownership in industrial power infrastructure.
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FAQs
Begin with matching the 915D frame to the enclosure and provide adequate clearance for ventilation. Connect the 440 V three-phase primary to the panel bus, wire the 220Y/127 V secondary to the load distribution, and ensure the WS39 weather shield is securely mounted for outdoor or harsh-environment installations. Verify grounding and follow Eaton’s installation guidelines to prevent heat buildup and ensure safe operation.
K-Factor nonlinear transformers are designed to handle distorted, harmonic-rich loads without overheating or voltage collapse. By shaping impedance and distributing harmonics more evenly, they reduce overheating risk, improve protection coordination, and improve overall power quality for equipment sensitive to waveform distortion in manufacturing and data-center environments.
Primary voltage is 440 V, and secondary voltage is 220Y/127 V. The unit includes taps: 2 at +2.5% FCAN and 4 at -2.5% FCBN, enabling voltage regulation to compensate for input fluctuations. This setup supports stable output in facilities with variable incoming power and helps maintain performance of downstream equipment.
The transformer carries UL Listed certification for North American safety compliance. Eaton’s policy provides a warranty of one year from installation or eighteen months from shipment, whichever occurs first. This combination supports regulatory confidence and predictable service life, reducing risk for mission-critical installations.
Maintenance requirements are minimal due to copper windings, robust shielding, and a ventilated design that maintains temperature rise within 80 °C. ROI drivers include reduced downtime from improved reliability, energy efficiency gains from high-quality windings, and lower lifecycle costs thanks to longer service intervals and strong warranty coverage.