Eaton N48M28T55EE Transformer 500 kVA 3-Phase UL Listed
Part Number: N48M28T55EE
Quick Summary
N48M28T55EE is a high-capacity transformer delivering reliable, conditioned power for critical industrial applications such as data centers, manufacturing lines, and automation facilities. Operators struggle with voltage swings that destabilize equipment and raise energy costs; this unit’s taps and robust design help stabilize supply in fluctuating grid conditions and demanding environments. Certified UL Listed and NEMA TP-1 compliant, with electrostatically shielded coils and a 150°C rise insulation system, it meets core industry safety and efficiency standards. In practice, this three-phase transformer reduces losses and supports compliance across facilities, enabling smoother startups of drives and controls while delivering measurable uptime and lower life-cycle costs.
Product Information
Extended Description
N48M28T55EE Eaton: Eaton K-Factor nonlinear ventilated transformer, KT-13 (3-phase), PV 480V, Taps: 2 at +2.5% /4 at -2.5%, SV 208Y/120V, 150°C rise w/ 200°C insulation systeam, 500 kVA, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28T55EE
UPC
786680034275
Product Length/Depth
42.65 in
Product Height
90 in
Product Width
69.26 in
Product Weight
4799 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
NEMA TP-1 Compliant
Certifications
UL Listed
Catalog Notes
Nema TP-1 efficient
Coil material
Aluminum
Frame
922
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Volt ampere rating
500 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208 Y/120 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Weathershield
WS36
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28T55EE
K-Factor nonlinear ventilated design improves transient response and fault tolerance, reducing overheating risk under high inrush events. The ventilated cooling pathway enhances heat dissipation for continuous operation in hot plant environments. Combined, these features extend insulation life and lower maintenance costs in multi-shift operations. Rated 500 kVA, 60 Hz, three-phase, with 480 V primary and 208Y/120 V secondary, this transformer supports critical loads and delivers clean, isolated power to drives and controls. The 42.65 in / 69.26 in / 90 in dimensions and 4799 lb weight reflect its rugged, industrial-class construction intended for permanent installations. Taps: 2 at +2.5% and 4 at -2.5% provide in-field voltage regulation to accommodate supply fluctuations and motor starting conditions. This reduces nuisance trips and helps maintain equipment efficiency across varying load profiles. Aluminum windings and electrostatically shielded construction minimize copper loss and stray magnetic fields, boosting overall efficiency. The WS36 weather shield supports outdoor installations and harsh environments. UL Listed and NEMA TP-1 compliant, with NEMA TP-1 efficient catalog notes, reinforce safety and regulatory alignment for distribution equipment in demanding facilities.
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FAQs
Install this 500 kVA, three-phase unit with appropriate clearances for mounting frame 922, allow for the WS36 weather shield in outdoor locations, and follow Eaton’s installation guidelines. Plan for 42.65 in length, 69.26 in width, and 90 in height, with secure 480 V/208Y/120 V connections and proper ventilated cooling for sustained operation.
The transformer is rated 500 kVA at 60 Hz, with a 480 V primary and 208Y/120 V secondary. It offers taps at +2.5% and -2.5%, a 150 °C rise insulation with a 200 °C insulation system, aluminum coil material, and electrostatically shielded construction for improved efficiency and safety.
Yes. It is UL Listed and NEMA TP-1 compliant, with catalog notes indicating NEMA TP-1 efficiency. This compatibility ensures safety, performance, and regulatory alignment for industrial power distribution installations and controlled environments.
UL Listed certification verifies safety of electrical components in the system, while NEMA TP-1 compliance confirms efficiency and performance standards for low-voltage distribution transformers. Together they reduce risk, support regulatory adherence, and improve overall system reliability in demanding industrial settings.
The combination of UL Listed safety, NEMA TP-1 compliance, reduced losses from aluminum windings, and the K-Factor nonlinear ventilated design lowers energy waste and maintenance needs. The unit’s robustness, weather shielding, and high insulation rating contribute to longer service life, lower downtime, and favorable total cost of ownership in continuous-operation facilities.