Eaton N48B28B45CUNV Transformer - UL Listed, Non-Ventilated
Part Number: N48B28B45CUNV
Quick Summary
The Eaton N48B28B45CUNV is a K-Factor non-linear, totally enclosed transformer for three-phase power distribution. In demanding facilities, engineers wrestle with heat rise, efficiency losses, and the complexity of combining 480 V primary with 208Y/120 V secondary in a single cabinet. UL Listed certification, a rugged 916AN frame, copper windings, and an electrostatic shield address safety, EMI, and longevity concerns for automation and control panels. With two taps at -5% FCBN and an 80°C rise rating, this transformer offers predictable regulation and resilience in fluctuating loads. By delivering reliable power with compact footprint, it supports cost-effective procurement, reduced downtime, and improved energy efficiency across Eaton-powered systems.
Product Information
Extended Description
N48B28B45CUNV Eaton: Eaton K-Factor Non Linear Transformer, Non-Ventilated, K-13, Three-phase, PV: 480V, Taps: 2 at -5% FCBN, SV: 208Y/120V, 80°C, 45 kVA, Cu windings, Elec. Shield, Frame: 916AN
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
N48B28B45CUNV
UPC
786680093791
Product Length/Depth
23.42 in
Product Height
46.58 in
Product Width
28.22 in
Product Weight
1286 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
Totally enclosed non-ventilated
Coil material
Copper
Design
K-13
Frame
916AN
Tap size
2 at -5% FCBN
Type
Non-ventilated transformer
Frequency rating
60 Hz
Kva Rating
45 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
80 °C rise
Special features
Electrostatically Shielded
Feature: K-Factor non-linear design (K-13) minimizes harmonic currents in 60 Hz systems. Business impact: improves voltage regulation and reduces stray heating in downstream equipment, cutting maintenance and downtime. Application: ideal for automation panels, variable-speed drives, and PLC-controlled lines that experience nonlinear loading. Feature: 45 kVA rating supports mid-size plant feeds. Business impact: provides reliable headroom without oversizing, enabling compact switchgear and simplified procurement. Application: motor control centers, presses, and process feeders in manufacturing facilities. Feature: 480 V primary / 208Y/120 V secondary with two taps at -5% FCBN. Business impact: simplifies voltage matching across systems and reduces field rewiring. Application: plant-wide distribution with varying input conditions. Feature: Copper windings and electrostatic shield. Business impact: high efficiency and EMI control, protecting sensitive controls and automation hardware. Application: automation systems, robotics, instrumentation near EMI sources. Feature: Totally enclosed non-ventilated enclosure. Business impact: dust/moisture protection and reduced cooling needs, lowering maintenance in harsh environments. Application: dusty plant floors, produced environments, and constrained electrical rooms. Feature: 80°C rise rating. Business impact: supports higher loading without overheating, improving reliability in hot facilities. Application: continuous operation where ambient temperature fluctuates. Feature: Frame 916AN; footprint 28.22 in W x 23.42 in D x 46.58 in H; weight 1286 lb. Business impact: facilitates planning for mechanical mounting and space allocation. Application: panel walls, machine rooms, and equipment houses with fixed footprints.
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FAQs
Plan for a robust hoisting and mounting setup to accommodate the 1286 lb weight, and ensure a stable foundation for the 916AN frame. Verify ambient temperature ratings and provide adequate clearance for proper connections, taps, and the electrostatic shield. Since it’s a totally enclosed, non-ventilated unit, install in a protected enclosure with suitable ventilation for surrounding equipment and easy access for maintenance.
This voltage pairing aligns with common plant feeders and control panels, enabling a streamlined power distribution path from main 480 V sources to low-voltage control circuits. The 45 kVA capacity supports mid-size loads, reducing the need for oversized gear. The -5% FCBN taps help maintain voltage stability under load fluctuations, improving drive and PLC performance.
The N48B28B45CUNV is UL Listed, ensuring compliance with essential electrical safety standards for industrial transformers. This certification supports safe integration into control panels and power distribution systems. Always verify site-specific regulatory requirements, as additional certifications may be pursued for specialized applications, but UL Listed provides a solid baseline for typical industrial environments.
Regular checks should focus on connection integrity, tap status, and enclosure cleanliness since this is a non-ventilated design. Monitor the 80°C rise rating under peak loads and ensure cooling room avoids excessive ambient heat. Inspect the copper windings and shield for any signs of EMI-related interference, and follow Eaton’s warranty guidelines to maintain peak reliability.
Expected ROI stems from improved energy efficiency, reduced downtime due to robust design, and lower maintenance needs from a rugged, shielded copper-winding construction. The transformer’s reliable 60 Hz operation and fixed 45 kVA rating support predictable budgeting for power distribution, while its compact footprint simplifies space planning and reduces soft costs in installation and integration.