Eaton N48M28B30CULS40 K-Factor Ventilated Transformer - UL
Part Number: N48M28B30CULS40
Quick Summary
The Eaton N48M28B30CULS40 K-Factor nonlinear ventilated transformer delivers reliable power conditioning for three-phase automation panels in manufacturing and processing environments. Customers often wrestle with voltage drift, heat buildup, and noise in control cabinets, leading to equipment downtime. UL Listed safety certification and an 80 °C rise specification underpin robust performance, while copper windings and electrostatic shielding reduce EMI. By combining protective features with a detailed tapping scheme and a weather-shield option, this transformer supports efficient integration in new builds and upgrades. Its 480 V primary and 208Y/120 V secondary compatibility, plus taps at +2.5% FCAN and -2.5% FCBN, enable precise voltage management in mixed-duty facilities.
Product Information
Extended Description
N48M28B30CULS40 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, 30 kVA , Cu windings, Elec. Shield, Frame: 912B
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28B30CULS40
UPC
786680025914
Product Length/Depth
16.5 in
Product Height
30 in
Product Width
23 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 40 dB
Coil material
Copper
Type
Ventilated transformer
Design
K-13
Frame
912B
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
30 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
80 °C rise
Modification 1
Low sound 40 dB
Special features
Electrostatically Shielded
Weathershield
WS38
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28B30CULS40
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: K-Factor nonlinear design limits harmonic distortion and improves overall power quality. Business impact: Reduced EMI and improved equipment reliability lead to longer life cycles and fewer production interruptions. Application: Automation panels and machine controls where harmonic currents can affect sensor accuracy and drive performance. Feature: Ventilated construction with an 80 °C rise rating. Business impact: Enhanced cooling preserves transformer rating under heavy loads, enabling sustained efficiency and fewer deratings. Application: High-load industrial environments with frequent cycling and peak demand. Feature: Tap changer with 2 at +2.5% FCAN and 4 at -2.5% FCBN. Business impact: Voltage regulation to maintain stable secondary voltage despite input fluctuations, reducing equipment wear. Application: Facilities with variable utility feeds or long feeders. Feature: Electrostatic shielding and copper windings. Business impact: Lower EMI, better leakage performance, and durable thermal handling translate to consistent operation in proximity to sensitive electronics. Application: Control rooms near CNCs, robotics, and precision instrumentation. Feature: Weathershield WS38 option and low sound profile (40 dB). Business impact: Outdoor or harsh indoor installations meet environmental demands without increasing noise budgets. Application: Outdoor substations, factory exteriors, and enclosed cabinets requiring quiet operation. Feature: UL Listed certification and frame 912B compatibility. Business impact: Streamlined approvals and straightforward mounting with standard industry frames. Application: New builds and retrofits across industrial power distribution. Feature: Copper windings and robust insulation. Business impact: Higher reliability, better thermal performance, and longer service life reduce maintenance costs. Application: Continuous-duty industrial transformers powering critical automation systems.
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FAQs
Install within the standard 912B frame footprint, provide adequate ventilation, and consider the WS38 weather shield for outdoor or harsh environments. Connect 480 V primary and 208Y/120 V secondary wiring, and utilize the taps at +2.5% FCAN and -2.5% FCBN to maintain voltage within tolerance. Ensure UL-listed safety compliance during setup.
Yes. The transformer employs electrostatic shielding and copper windings to minimize EMI and leakage inductance. This construction helps maintain stable output even near sensitive electronics, delivering reliable performance in control cabinets and automation panels while keeping emissions within acceptable levels.
The unit provides two taps at +2.5% FCAN and four taps at -2.5% FCBN to compensate line voltage fluctuations. This enables precise secondary voltage regulation, ensuring critical loads powered from 208Y/120 V maintain tolerance despite upstream variability common in manufacturing facilities.
The N48M28B30CULS40 is UL Listed, confirming compliance with recognized safety standards for electrical equipment. It supports 60 Hz operation, uses copper windings, and features an 80 °C rise, making it suitable for standard industrial power distribution within controlled environments and compliant control panels.
Warranty follows Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. For ongoing support, consult Eaton’s datasheets and the N48M28B30CULS40 specification sheet to guide installation, maintenance, and replacement parts, ensuring long-term reliability and serviceability.