Eaton N48M31T22 K-Factor Nonlinear Transformer - UL
Part Number: N48M31T22
Quick Summary
N48M31T22 is a K-Factor nonlinear ventilated transformer designed for 3-phase power distribution in industrial facilities. This solution addresses heat buildup and harmonic stress that shorten equipment life and drive energy losses in variable-load environments. UL Listed safety certification accompanies protective features such as electrostatic shielding, a 150°C rise rating, and a K-13 design to meet demanding industry standards. With 480 V primary and 220Y/127 V secondary, plus selectable taps, it helps engineers optimize performance while keeping installation flexible in existing switchgear. This combination supports improved uptime and lower lifecycle costs for industrial and process applications.
Product Information
Extended Description
N48M31T22 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: 923, uses WS37
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M31T22
UPC
786680051784
Product Length/Depth
32.65 in
Product Height
57.54 in
Product Width
36.69 in
Product Weight
1768 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
923
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
WS37
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M31T22
The K-Factor nonlinear design targets high-harmonic environments, delivering 45 kVA of reliable three-phase power with a 60 Hz rating. By tailoring impedance to nonlinear loads, it reduces harmonic stress on upstream feeders and downstream equipment, promoting cooler operation and longer motor life. This makes it well-suited for industrial drives, data-processing rooms, and mixed-load assemblies where power quality matters. Ventilated construction with aluminum windings supports superior heat management under continuous or peak loading. The 150°C rise specification indicates robust thermal headroom, enabling tighter short-term overload tolerance without unwarranted temperature rise in windings. In practice, facilities experience fewer deratings and more consistent voltages, translating into higher process uptime and predictable performance. Tap options include 2 at +2.5% FCAN and 4 at -2.5% FCBN, enabling fine voltage regulation at multiple site conditions. This feature reduces downstream equipment stress and eliminates the need for additional regulators in many installations. End-users gain installation flexibility when feeding variable loads across different distribution panels. Electrostatic shielding plus WS37 weathershield provide EMI containment and weather protection, supporting outdoor or harsh-environment deployments. The frame 923 and rugged aluminum windings contribute to mechanical robustness, while the three-phase configuration aligns with standard industrial switchgear. The combination simplifies integration with Eaton and compatible third-party components. With a weight of approximately 1,768 lb and a substantial footprint, N48M31T22 is a fixed, factory-mounted transformer. Installation benefits include clearly defined mounting dimensions and a straightforward wiring scheme, combined with the UL Listed safety certification for regulatory compliance. A one-year warranty (18 months from shipment) provides peace of mind.
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FAQs
N48M31T22 is a three-phase transformer designed for 480 V primary supply and 220Y/127 V secondary use. Its frame 923 footprint and mounting dimensions align with standard switchgear layouts, but it is a heavy, fixed unit requiring appropriate lifting equipment and secure mounting. The 2x +2.5% and 4x -2.5% taps allow voltage adjustments in sites with fluctuating input without extra regulators.
The unit uses a K-Factor nonlinear design to accommodate harmonic-rich loads, delivering 45 kVA at 60 Hz with a 150°C rise. Aluminum windings and electrostatic shielding help minimize losses and EMI, ensuring cleaner power delivery to drives and sensitive equipment while maintaining thermal headroom under peak conditions.
Yes. Its three-phase 480 V to 220Y/127 V output supports varied distribution needs in data centers and process environments. The K-13 design, ventilated cooling, and robust construction provide reliable operation under harmonic loading, with the electrostatic shield reducing EMI and WS37 weather shield enabling outdoor or harsh-environment deployments.
The transformer is UL Listed, confirming adherence to established electrical safety standards. Verification can be done via the Eaton specification sheet and catalog references, which include the UL listing and performance data. For regulated environments, cross-checking the model N48M31T22 against local electrical codes is recommended.
The N48M31T22 carries a one-year warranty from installation or eighteen months from shipment. Heavy, durable construction (frame 923, aluminum windings, shielding) reduces maintenance frequency. ROI improves through higher uptime, lower derating risk under harmonic loads, and predictable lifecycle costs due to robust thermal performance and reliable power conditioning.