Eaton N48M28F75EESR Transformer - NEMA TP-1 Efficient
Part Number: N48M28F75EESR
Quick Summary
The Eaton N48M28F75EESR is a K-Factor nonlinear ventilated transformer for robust three-phase power distribution. Operators contend with harmonic distortion and voltage fluctuations that drive overheating; this design mitigates those risks with taps and regulated performance. It carries NEMA TP-1 efficiency certification and ships with a certified sound level report, plus an 115°C rise rating to satisfy demanding applications. With 75 kVA capacity and aluminum windings, the unit delivers reliable energy transfer while easing maintenance in industrial environments. The inclusion of adjustable taps and rugged construction supports uptime, lower energy waste, and predictable downstream voltages across manufacturing lines, data centers, and service entrances.
Product Information
Extended Description
N48M28F75EESR 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, 115°C rise, 75 kVA, EE, SR
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M28F75EESR
UPC
786680111877
Product Length/Depth
23.42 in
Product Height
48.56 in
Product Width
28.22 in
Product Weight
713 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
Contact Manufacturer
Catalog Notes
NEMA TP-1 efficient Certified sound level report.
Coil material
Aluminum
Wiring connection
283B
Type
Nonlinear ventilated transformer
Frame
916A
Tap size
2 at +2.5% FCAN 4 at -2.5% FCBN
Frequency rating
60 Hz
Volt ampere rating
75 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208 Y/120 V
Temperature rise
115 °C rise
Special features
Electrostatically shielded
Weathershield
WS19
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M28F75EESR
K-Factor nonlinear ventilated design reduces harmonic heating and thermal stress, improving insulation life and efficiency under nonlinear loads. This translates to lower cooling costs and reduced risk of overheating in high-harmonic environments like drives and rectifiers, with applications in metal fabrication cells and data-center peripheral equipment. The 75 kVA three-phase rating supports significant loads for main distribution, reducing the number of transformers needed on site and simplifying panel space planning in electrical rooms. Tap changers with ±2.5% adjustments improve voltage regulation during load changes, minimizing undervoltage and overvoltage conditions in plant sections with fluctuating demand. Aluminum windings paired with the WS19 weather shield offer corrosion resistance and durability, enabling reliable outdoor or harsh-environment operation. A 115°C rise insulation rating ensures robust performance under elevated ambient conditions, boosting uptime. The standard wiring connection 283B and 480 V primary with 208Y/120 V secondary simplify integration with common switchgear, delivering a predictable footprint and easier installation.
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FAQs
This is a three-phase transformer with a 480 V primary and 208Y/120 V secondary, designed for standard switchgear interfaces using a 283B wiring connection. Its footprint (approximately 23.42 in L x 48.56 in H x 28.22 in W) and weight (about 713 lb) fit common plant rooms, electrical closets, and equipment rooms. Ensure adequate ventilation and space for maintenance clearances around the WS19 weather shield and aluminum windings.
The K-Factor nonlinear design mitigates harmonic currents by reducing thermal stress and improving voltage regulation under nonlinear loading. This leads to cooler operation, longer insulation life, and lower cooling costs. It is particularly beneficial for drives, rectifiers, and other nonlinear loads typical in manufacturing environments and data centers.
Yes. It uses aluminum windings and a WS19 weather shield for enhanced durability in challenging environments. The 115°C rise insulation rating supports reliable operation under elevated temperatures, and the NEMA TP-1 efficiency certification adds assurance of compliance and energy performance in demanding facilities.
The product ships with the Eaton specification sheet (N48M28F75EESR), a certified NEMA TP-1 efficiency claim, and a certified sound level report. Additional catalogs and the transformer manual are available through Eaton’s catalog and multimedia assets for quick reference during procurement and commissioning.
The unit follows Eaton’s policy 25-000 with a one-year warranty from installation or eighteen months from shipment, whichever occurs first. For maintenance, plan routine insulation resistance checks, winding temperature monitoring, and periodic cooling system verification to sustain performance and uptime.