Eaton N48M28B12A Transformer - UL Listed K-13
Part Number: N48M28B12A
Quick Summary
The Eaton N48M28B12A Transformer is a K-Factor nonlinear ventilated transformer for three-phase power distribution in industrial facilities. Engineers frequently struggle with heat buildup, efficiency losses, and maintenance downtime when large transformers operate in harsh environments. This UL Listed design delivers 112.5 kVA with aluminum windings, an 80°C rise, and frame 917, offering reliable protection against overtemperature and EMI. With a 480 V primary and 208Y/120 V secondary, plus taps at +2.5% and -2.5%, the unit integrates with modern distribution systems, minimizing installation complexity and downtime. This combination delivers robust performance, ease of installation, and long-term cost savings for engineers and procurement teams.
Product Information
Extended Description
N48M28B12A Eaton: K-Factor nonlinear ventilated transformer K-13, Three-phase, PV: 480V, Taps: 2 at 0.025 FCAN, 4 at -0.025 FCBN, SV: 208Y/120V, 80°C, 112.5 kVA , Al windings, Elec. Shield, Frame: 917
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28B12A
UPC
786680370205
Product Length/Depth
24.67 in
Product Height
56.17 in
Product Width
31.44 in
Product Weight
1100 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
Catalog Notes
Model A
Coil material
Aluminum
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
WS34
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28B12A
Feature: K-Factor nonlinear ventilated design improves heat management and harmonic handling, reducing thermal aging and extending transformer life. Business impact: lowers maintenance costs, increases uptime, and supports compliant operation in facilities with mixed loads. Application: data centers and manufacturing floors where nonlinear loads are common and reliability matters. Feature: Three-phase operation with 480 V primary and 208Y/120 V secondary delivers consistent voltage conversion with efficient distribution. Business impact: minimizes voltage drop, protects connected equipment, and simplifies panel design. Application: industrial automation lines, process controls, and commercial infrastructure with standard 480 V input. Feature: Aluminum windings and electrostatic shielding enhance durability and EMI performance. Business impact: improves short-circuit endurance and EMI suppression, reducing nuisance faults and improving signal integrity in noisy plant environments. Application: environments with dense cabling and sensitive controls. Feature: Tap settings (2 at +2.5%, 4 at -2.5%) enable on-site voltage compensation without external tap-changers. Business impact: rapid voltage stabilization during source variations, lowering the risk of equipment undervoltage/overvoltage events. Application: facilities with fluctuating incoming power or long feeder runs. Feature: Rugged frame 917, dimensions around 24.67 in L × 31.44 in W × 56.17 in H and 1100 lb weight, plus WS34 weathering options. Business impact: straightforward installation in existing footprints and resilient performance in harsh environments. Application: plant floors, switchgear rooms, and outdoor installations where weather protection is desirable. Warranty and certifications: UL Listed with a one-year policy from installation or 18 months from shipment, whichever occurs first. This supports predictable maintenance planning and supplier accountability, aligning with procurement expectations for long-life power components.
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FAQs
When installing the N48M28B12A, consider its footprint and weight (approximately 24.67 in L, 31.44 in W, 56.17 in H and about 1100 lb). Mounting should accommodate frame 917, with adequate clearance for ventilation. The unit supports on-site taps (+2.5% and -2.5%) for voltage adjustments, and it is UL Listed for safety in demanding environments.
Key specs include a 112.5 kVA rating, a three-phase configuration, 480 V primary, and 208Y/120 V secondary. It operates at 60 Hz with an 80°C rise and uses aluminum windings. The device provides voltage-tap options at +2.5% and -2.5% to maintain stable output under supply variations.
Yes, the N48M28B12A is UL Listed, indicating compliance with safety standards for industrial power equipment. Maintenance needs are typical for a ventilated transformer: monitor winding temperature rise, ensure ventilation paths remain unobstructed, and verify tap positions during voltage fluctuations. The unit’s shielded design and weather shield option aid long-term reliability.
This transformer is well suited for three-phase power distribution in industrial facilities, including data centers, manufacturing lines, and process plants. Its K-Factor nonlinear design handles harmonic-rich loads, while the 480 V to 208Y/120 V output supports control panels, drives, and instrumentation with consistent voltage in demanding environments.
The combination of aluminum windings, electrostatic shielding, and ventilated cooling reduces thermal stress and EMI-related faults, lowering maintenance and replacement costs. The ability to tune voltage with taps minimizes energy waste and voltage excursions. Together with UL certification and a robust frame, this translates to lower lifecycle costs and predictable performance.