Eaton N48M31B22CUEE Transformer - UL Listed
Part Number: N48M31B22CUEE
Quick Summary
The Eaton K-Factor nonlinear ventilated transformer is designed to provide robust power conditioning for demanding industrial environments. Fluctuating voltages and overheating commonly throttle uptime in plants, drives, and control panels. UL Listed, NEMA TP-1 compliant, and 80°C rise ratings support reliability under harsh duty. Together with copper windings and a 225 kVA core, it delivers efficient, scalable power conditioning with on-site tap adjustments. The unit supports a three-phase 480 V system with secondary 220Y/127 V, enabling seamless integration with existing motor loads, PLCs, and UPS interfaces. Its 2 at +2.5% and 4 at -2.5% taps provide precise voltage regulation to keep equipment within tolerance during load swings. Manufacturers benefit from extended transformer life, reduced maintenance intervals, and compliance confidence with NEMA TP-1 efficient catalog notes.
Product Information
Extended Description
N48M31B22CUEE Eaton: Eaton K-Factor nonlinear ventilated transformer, KT-13 (3-phase), PV 480V, Taps: 2 at +2.5% /4 at -2.5%, SV 220Y/127V, 80°C rise, 225 kVA, Copper windings, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M31B22CUEE
UPC
786680080432
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
3708 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.
Compliances
NEMA TP-1 Compliant
Certifications
UL Listed
Catalog Notes
Nema TP-1 efficient
Coil material
Copper
Frame
919E
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Volt ampere rating
225 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
220 Y/127 V
Temperature rise
80 °C rise
Special features
Electrostatically Shielded
Weathershield
WS35
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M31B22CUEE
Paragraph 1: Feature: K-Factor nonlinear design with ventilated, electrostatically shielded windings reduces harmonic currents and improves heat dissipation in challenging loads. Business impact: The result is lower operating temperatures, fewer trips, and longer transformer life in drives, welders, and other nonlinear equipment. Application: Use in manufacturing lines and process controls where harmonic-rich workloads are common. Paragraph 2: Feature: Copper windings and a rugged 919E frame deliver high conductivity and structural integrity. Business impact: Improved efficiency, predictable performance, and easier installation translate to reduced maintenance and faster commissioning. Application: Suitable for large plant feeders, panel boards, and distribution centers in heavy industry; WS35 weather shield option expands outdoor/damp-environment usability. Paragraph 3: Feature: Tap settings of +2.5% and -2.5% provide precise voltage regulation. Business impact: On-site regulation minimizes voltage drop under load swings, reducing equipment stress and trips. Application: On-site adjustments in facilities with variable loads and long feeders. Paragraph 4: Feature: 225 kVA rating, 60 Hz operation, 480 V primary, and 220Y/127 V secondary meet mid-range industrial demand. Business impact: Offers headroom for growth while maintaining stable output for motors, drives, and controls. Application: Industrial power distribution in manufacturing, process industries, and data centers. Paragraph 5: Feature: UL Listed certification and NEMA TP-1 efficient catalog notes validate safety, reliability, and energy performance. Business impact: Streamlined compliance, easier supplier qualification, and confidence in meeting industry standards reduce procurement risk and downtime. Application: Widely adopted in regulated environments where audits and efficiency targets drive equipment choices.
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FAQs
Plan for secure, level mounting on a reinforced floor and clear ventilation around the rugged 919E frame. Confirm a 480 V supply and a 220Y/127 V secondary in your panel layouts, and provide adequate clearance for hot spots. Use the WS35 weather shield if the unit operates outdoors or in damp areas.
Voltage regulation is aided by on-site taps: +2.5% and -2.5% adjustments to suit load swings. In practice, connect to a consistent 480 V source and monitor the 220Y/127 V secondary under dynamic loads such as motor drives. The 225 kVA rating provides headroom for short-term surges, helping maintain stable output even when feeders fluctuate.
Yes. The transformer uses K-Factor design suitable for nonlinear harmonic-rich loads found in drives, welding, and CNC controls, reducing overheating and stray currents. The 80 °C rise rating supports elevated operating temperatures, and the WS35 weather shield option expands outdoor usability. UL Listed and NEMA TP-1 compliant status ensures regulatory alignment and durable performance under industrial conditions.
UL Listed confirms electrical safety and component integrity, while NEMA TP-1 compliance signals suitability for general purpose distribution and efficiency. Together they simplify audits, reduce qualification time for new lines, and support warranties tied to standard industry criteria. The product includes a one-year warranty from installation or 18 months from shipment, whichever occurs first.
Copper windings provide superior conductivity and heat dissipation, reducing energy losses and extending service life, lowering maintenance frequency. With a 225 kVA rating, this transformer can support growth in load without replacement. The robust 919E frame and on-site taps simplify installation and future regulation, improving uptime and reducing total cost of ownership.