Eaton N48M28T75EEZZ Open-core Transformer - UL Listed Certified
Part Number: N48M28T75EEZZ
Quick Summary
Eaton N48M28T75EEZZ Open-core Transformer delivers reliable three-phase power from 480 V to 208Y/120 V for industrial equipment. Engineers often struggle with precise voltage regulation and installation in tight electrical rooms, leading to downtime and compliance risks. UL Listed and NEMA TP-1 compliant provide safety and efficiency assurances for mission-critical equipment. With open-core ventilation, adjustable taps, and a rugged 75 kVA rating, it fits compact electrical rooms while delivering stable output and predictable performance for modern manufacturing and automation systems.
Product Information
Extended Description
N48M28T75EEZZ Eaton: Eaton Open core-coil 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, 75 kVA, EE, ZZ
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
N48M28T75EEZZ
UPC
786680053504
Product Length/Depth
23.63 in
Product Height
41.43 in
Product Width
23.5 in
Product Weight
695 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, Easy install base
Coil material
Aluminum
Frame
916C
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208 Y/120 V
Temperature rise
150 °C rise
Volt ampere rating
75 kVA
Special features
Electrostatically Shielded
Weathershield
WS33
Feature: Open-core ventilated design enhances cooling and reduces temperature rise. Business Impact: Lower thermal stress extends transformer life and minimizes derating, reducing maintenance costs. Application: Machinery floors and control panels in high-heat environments. Feature: Adjustable voltage taps (2 at +2.5%, 4 at -2.5%). Business Impact: Precise secondary voltage under fluctuating loads, improving PLC and drive performance. Application: Critical power rails in CNCs and robotics. Feature: 75 kVA three-phase rating. Business Impact: Supports medium-load distribution with headroom for future expansion, lowering total units needed. Application: Central control panels and subpanels in manufacturing lines. Feature: Aluminum coil and 916C frame. Business Impact: Lightweight installation, easier handling, and robust mechanical mounting. Application: Space-constrained electrical rooms and modular switchgear. Feature: NEMA TP-1 efficiency and UL Listed; WS33 weather shield option. Business Impact: Compliance and reliability in diverse environments, including outdoor or harsh facilities. Application: Outdoor substations and weather-exposed enclosures.
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FAQs
This model is a three-phase 480 V input transformer with 208Y/120 V secondary, designed for standard enclosure mounting and field wiring. Verify enclosure space for dimensions (approximate footprint from spec), confirm primary voltage matches 480 V, and use appropriate lugs or terminal kits. Take advantage of the +2.5% and -2.5% taps to tune the secondary voltage during commissioning. Ensure the WS33 weather shield is installed if used outdoors and follow UL Listed safety guidance during installation for compliance and warranty adherence.
The transformer provides two taps at +2.5% and four taps at -2.5%. During commissioning, measure the secondary under load and adjust taps to keep 208 Y/120 V within tolerance. This helps minimize under- or over-voltage on downstream controls and drives, improving performance and reducing nuisance trips in automation equipment.
Yes. With 75 kVA capacity, 480 V primary, and a 208Y/120 V secondary, it suits mid-range power distribution for data centers, automation panels, and machine controls. The open-core ventilated design supports effective cooling in dense installations, while NEMA TP-1 efficiency and UL Listing provide regulatory confidence for critical infrastructure.
This unit is UL Listed and NEMA TP-1 compliant, ensuring recognized safety and efficiency standards for low-voltage power distribution. Compliance reduces risk of regulatory delays, supports energy-performance claims, and simplifies supplier qualification for industrial projects.
The 75 kVA rating with open-core ventilation supports reliable operation with reduced thermal stress, extending service life. Aluminum windings and the WS33 weather shield option lower maintenance needs and enable outdoor use. Combined with voltage-tap adjustment and high-efficiency design, the solution lowers energy waste and downtime, delivering measurable total cost of ownership improvements.