Eaton N48M51T55EE Transformer - UL Listed, NEMA TP-1
Part Number: N48M51T55EE
Quick Summary
The Eaton N48M51T55EE transformer is a K-Factor nonlinear ventilated transformer for high-demand, three-phase power distribution. Engineers frequently struggle with heat management, voltage fluctuations, and retrofit compatibility as loads evolve. UL Listed and NEMA TP-1 compliant, this unit combines protective features with reliable performance in demanding environments. It uses aluminum coil material, a rugged frame 922, and offers taps at +2.5% and -2.5% to maintain voltage accuracy across variable loads. The 480 V primary and 416Y/240 V secondary support flexible configurations, while a 150°C rise rating and 200°C insulation provide resilience in hot operating conditions. For OEMs and service teams, the design simplifies installation, enhances uptime, and reduces total cost of ownership over the transformer’s life.
Product Information
Extended Description
N48M51T55EE Eaton: Eaton K-Factor nonlinear ventilated transformer, KT-13 (3-phase), PV 480V, Taps: 2 at +2.5% /4 at -2.5%, SV 416Y/240V, 150°C rise w/ 200°C insulation systeam, 500 kVA, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M51T55EE
UPC
786680082979
Product Length/Depth
42.65 in
Product Height
90 in
Product Width
69.26 in
Product Weight
4613 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
416 Y/240 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 - N48M51T55EE
Feature: K-Factor nonlinear ventilated design → Business Impact: Improves harmonic handling and thermal management under varying load profiles, reducing operating temperature and extending service life. Application: Data centers and manufacturing floors needing stable voltage during peak demand. Long-tail keywords: K-Factor transformer, nonlinear ventilated transformer, harmonic distortion reduction. Feature: 480 V primary and 416Y/240 V secondary with 60 Hz operation → Business Impact: Delivers versatile integration with common utility voltages and equipment, simplifying panel design and installation. Application: Industrial controls, motor feeders, and distribution cabinets. Feature: Tap settings of +2.5% and -2.5% → Business Impact: Maintains voltage regulation under load changes, minimizing derating and improving equipment uptime. Application: Retrofit projects and dedicated feeders with tight voltage tolerances. Feature: Aluminum coil material and frame 922 → Business Impact: Enhances durability, reduces thermal hotspots, and eases serviceability in harsh environments. Application: Outdoor installations with WS36 weather shield compatibility. Feature: 150°C rise, 200°C insulation → Business Impact: Supports higher allowable temperatures, enabling denser cooling strategies and reliability in hot plants. Application: Severe duty environments and high ambient conditions. Feature: Electrostatically shielded construction and WS36 weather shield → Business Impact: Improves fault isolation and corrosion resistance, extending life in outdoor substations and outdoor enclosures. Application: Outdoor power distribution and harsh factory settings. Feature: Compliance and certifications (UL Listed, NEMA TP-1) → Business Impact: Provides regulatory assurance, simplifying procurement audits and customer acceptance. Application: Public sector projects and regulated industries.
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FAQs
Installers should plan for a three-phase, pad-mounted or enclosure-mounted footprint matching the model’s frame 922 dimensions. Ensure adequate clearance for cooling, secure mounting, and proper connection to a 480 V primary and 416Y/240 V secondary. Use the +2.5% and -2.5% taps to accommodate voltage fluctuations and verify UL Listed and NEMA TP-1 compliance during commissioning.
The unit delivers 500 kVA at 60 Hz with a 480 V primary and 416Y/240 V secondary. It employs aluminum windings, a protective electrostatic shield, and a WS36 weather shield option. Temperature rise is rated at 150°C with 200°C insulation, and the device includes taps for voltage regulation to maintain stable output under varying load.
Yes. Its three-phase 480 V/416Y-240 V configuration, 500 kVA rating, and K-Factor nonlinear ventilation make it suitable for data centers and manufacturing environments. Compliance with UL and NEMA TP-1 supports enterprise reliability, while the electrostatic shielding and weather shield options enhance uptime in outdoor or harsh indoor spaces.
This transformer is UL Listed and NEMA TP-1 compliant, indicating adherence to safety and efficiency standards. Compliance supports procurement in regulated industries and improves audit readiness. The design also aligns with energy-efficient catalog notes and manufacturer warranty terms, helping reduce total ownership costs.
Expect reduced downtime due to robust cooling and reliable windings, with a 1-year warranty from installation or 18 months from shipment. The combination of high efficiency, voltage regulation capability, and corrosion protection lowers maintenance costs and extends service life, delivering a favorable return on investment in continuous-operation facilities.