Eaton N57M28T75CUEE Transformer - UL Listed, NEMA TP-1
Part Number: N57M28T75CUEE
Quick Summary
Eaton K-Factor nonlinear ventilated transformer powers three-phase control panels in industrial facilities. Engineers often confront voltage regulation challenges and overheating when loads vary or harmonics are present. It is UL Listed and NEMA TP-1 compliant, with copper windings and a 150°C rise rating, reinforcing safety and long-term reliability. Designed for 575 V primary and 208Y/120 V secondary, this 75 kVA unit delivers robust, stable power for automation, panel boards, and distribution needs while supporting efficient operation and reduced downtime.
Product Information
Extended Description
N57M28T75CUEE Eaton: Eaton K-Factor nonlinear ventilated transformer, KT-13 (3-phase), PV 575V, Taps: 2 at +2.5% /4 at -2.5%, SV 208Y/120V, 150°C rise w/ 200°C insulation systeam, 75 kVA, Copper windings, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N57M28T75CUEE
UPC
786680046711
Product Length/Depth
23.42 in
Product Height
48.56 in
Product Width
28.22 in
Product Weight
950 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
Copper
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
575 V
Secondary Voltage
208 Y/120 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Weathershield
WS19
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N57M28T75CUEE
Feature: K-Factor nonlinear ventilated design. Business Impact: Improves harmonic resilience and heat management, reducing derating and extending component life in demanding automation environments. Application: Ideal for industrial control panels and motor-driven processes where harmonic loads are common. Feature: Copper windings and 150°C rise insulation. Business Impact: Lower copper losses and higher temperature tolerance improve efficiency and reliability in hot industrial plants. Application: Suitable for dense switchgear and weather-exposed deployments where uptime matters. Feature: Taps at 2 at +2.5% and 4 at -2.5%. Business Impact: Tight voltage regulation under fluctuating loads, minimizing equipment stress and nuisance tripping. Application: Power distribution in systems with variable demand or long feeders. Feature: 75 kVA three-phase rating with 575 V primary and 208Y/120 V secondary. Business Impact: Flexible, scalable power for mid-sized automation lines, minimizing spare transformer needs. Application: Panel boards, motor drives, and substation feeders. Feature: Compliance and rugged build (UL Listed, NEMA TP-1 efficient, copper coils, WS19 weather shield). Business Impact: Simplified procurement with safety assurances and installer confidence, plus outdoor-ready installation. Application: Industrial facilities seeking compliant, durable power distribution solutions.
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FAQs
The N57M28T75CUEE is a three-phase transformer designed for a 575 V primary and 208Y/120 V secondary, rated at 75 kVA. Its copper windings support high current capability, while the 60 Hz frequency aligns with standard industrial power systems. The unit fits typical panel boards and switchgear footprints, enabling straightforward integration into existing 575 V footprints with predictable regulation and safe insulation margins.
The dual taps provide ±2.5% regulation to compensate for voltage drops or boosts along feeders and under varying load conditions. This feature helps maintain stable secondary voltage at the 208Y/120 V level, reducing equipment misoperation, improving control accuracy, and minimizing nuisance tripping in automation networks.
The transformer is UL Listed and NEMA TP-1 compliant, with NEMA TP-1 efficient catalog notes. These certifications ensure safety under normal operating conditions, support energy efficiency targets, and simplify regulatory compliance for industrial facilities. For system integrators, these marks also facilitate procurement approvals and ongoing maintenance planning.
The unit uses a 916A frame with dimensions of about 23.42 in L, 28.22 in W, and 48.56 in H, weighing approximately 950 lb. Plan for adequate footprint, clearance for cooling, and suitable mounting provisions. Outdoor installations can leverage WS19 weather shield options, and the electrostatically shielded design helps mitigate EMI in dense equipment racks.
Warranty covers one year from installation or 18 months from shipment, whichever comes first. The 75 kVA copper-wound design, 150°C rise rating, and K-Factor protection contribute to reduced maintenance intervals and longer service life, delivering a favorable total cost of ownership (TCO) for mid-sized automation projects and mission-critical power distribution.