Eaton N48M28B33CULS55 K-Factor nonlinear Transformer UL
Part Number: N48M28B33CULS55
Quick Summary
N48M28B33CULS55 is a K-Factor nonlinear ventilated transformer designed for three-phase power distribution in industrial facilities. Engineers often contend with noise, heat buildup, and space constraints when upgrading transformer assets. UL Listed certification provides safety assurance for installation in critical environments, while the electrostatic shield and low-noise performance support compliant operation in demanding spaces. Designed as a K-13 nonlinear ventilated transformer, it supports 300 kVA capacity, 480 V primary, and 208Y/120 V secondary with 60 Hz operation. This combination enables efficient, compliant power delivery with robust thermal management for manufacturing lines and facilities. With selectable taps, copper windings, and comprehensive datasheets, maintenance planning and procurement cycles become more predictable.
Product Information
Extended Description
N48M28B33CULS55 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, 300 kVA , Cu windings, Elec. Shield, Frame: 919
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28B33CULS55
UPC
786680027550
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
1 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
Low sound equal to 55 dB
Coil material
Copper
Type
Ventilated transformer
Design
K-13
Frame
919
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
300 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
80 °C rise
Modification 1
Low sound 55 dB
Special features
Electrostatically Shielded
Weathershield
WS35
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28B33CULS55
Feature → Business Impact → Application: The N48M28B33CULS55 employs a K-Factor nonlinear design that enhances fault tolerance and EMI resilience, enabling safer operation in mixed-load environments and reducing unexpected downtime in industrial plants. This translates to improved equipment availability and lower maintenance costs for continuous production lines. Feature → Business Impact → Application: The ventilated construction improves cooling for the 80°C rise rating, supporting stable voltage under heavy load and longer transformer life in hot environments like metal fabrication or process lines. Feature → Business Impact → Application: Copper windings deliver superior conductivity and durability, reducing copper loss and enabling efficient energy distribution across three-phase systems in data centers and manufacturing facilities. Feature → Business Impact → Application: Electrostatically shielded construction minimizes EMI coupling into sensitive control panels and drive systems, improving control reliability in automation networks. Feature → Business Impact → Application: The 480 V primary and 208Y/120 V secondary with 60 Hz compatibility simplifies integration with standard plant electrical systems, reducing installation time and enabling seamless retrofit into existing power distribution infrastructure. Feature → Business Impact → Application: Tap changers (2 at +2.5% FCAN, 4 at -2.5% FCBN) provide voltage tuning to match fluctuating loads, improving voltage stability for critical equipment and minimizing nuisance tripping during grid disturbances.
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FAQs
This three-phase transformer uses a 480 V primary and 208Y/120 V secondary and fits standard electrical rooms with frame 919. Ensure adequate ventilation for the 80 °C rise rating, confirm UL Listed compliance, and plan for taps at +2.5% and -2.5% to accommodate voltage variations in your distribution panel.
Key specs include a 300 kVA rating, 60 Hz frequency, 480 V primary, 208Y/120 V secondary, copper windings, and an electrostatic shield. The unit is designed as a K-Factor nonlinear ventilated transformer with a low-noise profile and an 80 °C temperature rise to support demanding loads.
Yes. The catalog notes designate a low sound level of 55 dB, which helps minimize acoustic impact in manufacturing floors, control rooms, and adjacent spaces while maintaining reliable power distribution.
The transformer carries UL Listed certification for safety compliance. Warranty terms follow Eaton policy 25-000, offering one year from installation or eighteen months from shipment, whichever comes first, providing manufacturers with a clear maintenance and replacement timeline.
You can access the Eaton specification sheet for N48M28B33CULS55, the transformer distribution catalog, and related materials through Eaton’s official resources. Downloads include the Commercial Distribution catalog, the Eaton Specification Sheet, and an introductory video on Eaton's Transformer Flex Center, which facilitate installation planning and procurement.