Eaton N48M28B12CU Transformer - Ventilated K-13 UL Listed
Part Number: N48M28B12CU
Quick Summary
The Eaton N48M28B12CU transformer is a K-Factor nonlinear, ventilated transformer designed for robust three-phase power distribution in industrial facilities. Engineers often struggle with harmonic distortion, heat buildup, and protective device coordination as loads vary. This unit carries UL Listed certification and is built for an 80 °C rise, copper windings, and an electrostatic shield to control EMI. With a 112.5 kVA rating and a 480 V primary feeding a 208Y/120 V secondary, it supports reliable, scalable installations while simplifying service and maintenance. The design aligns with Eaton's performance standards and helps ensure regulatory compliance in demanding environments.
Product Information
Extended Description
N48M28B12CU 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/120, 80°C, 112.5 kVA, Cu windings, Elec. Shield, Frame: 917, uses WS34
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28B12CU
UPC
786680105791
Product Length/Depth
24.67 in
Product Height
56.17 in
Product Width
30.61 in
Product Weight
1435 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
Not Applicable
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
112.5 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
80 °C rise
Special features
Electrostatically Shielded
Weathershield
0
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28B12CU
Selling Policy 25-000 - Distribution and Control Products and Services
The K-Factor nonlinear design reduces harmonic stress on upstream equipment, translating into longer insulation life and lower maintenance costs. In real-world facilities with variable loads from motors to drives, users experience fewer nuisance trips during harmonic events and more predictable performance. The ventilated construction enables efficient heat dissipation, supporting an 80 °C rise and extending transformer life in crowded switchgear rooms. Copper windings deliver low resistance, improving efficiency and thermal stability while the electrostatic shield mitigates EMI and helps meet sensitive equipment requirements. With a 112.5 kVA rating and 480 V primary to 208Y/120 V secondary, the unit integrates smoothly with common plant distributions and reduces the need for additional step-down gear. Taps at +2.5% and -2.5% allow voltage tuning to compensate for supply fluctuations without extra hardware, simplifying commissioning and reducing downtime. The Frame 917 size and WS34 compatibility provide installation flexibility in existing enclosures, while UL Listed certification supports compliance and procurement confidence. In practice, this transformer supports scalable, resilient power distribution for manufacturing lines, data centers, and process facilities, aligning with maintenance budgets and long-term ROI targets.
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FAQs
The N48M28B12CU is a three-phase transformer with a 480 V primary and 208Y/120 V secondary, designed for standard industrial power distribution. It fits in spaces intended for frame 917 equipment and supports WS34 compatibility. With copper windings and a ventilated design, it suits switchgear rooms, manufacturing lines, and data centers where reliable voltage transformation and thermal management are critical.
Key specs include a 112.5 kVA rating, 60 Hz frequency, three-phase configuration, 480 V primary, and 208Y/120 V secondary. It offers voltage taps: 2 at +2.5% FCAN and 4 at -2.5% FCBN for on-site voltage adjustment. The design supports an 80 °C rise, enabling stable operation under demanding industrial loads.
Yes, the N48M28B12CU is UL Listed, providing industry-recognized safety certification for equipment used in critical electrical systems. Installation considerations include frame 917 dimensions and WS34 compatibility, 24.67 in length, 30.61 in width, 56.17 in height, and an approximate weight of 1435 lb. Plan for copper windings, Electrostatic Shield, and ventilation to maintain performance.
The K-Factor nonlinear design mitigates harmonic-induced overheating and electrical stress, improving reliability in systems with non-linear loads. It supports better insulation life, reduced maintenance, and fewer unexpected trips. This makes it suitable for facilities with drives, reconfigurable manufacturing lines, and critical equipment sensitive to harmonics.
The transformer is covered under Eaton’s warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. Regular maintenance should focus on ensuring the ventilated design remains unobstructed, verifying tap changes for voltage accuracy, and inspecting the electrostatic shield integrity to sustain EMI performance.