Eaton NT20P11S25CUEE Transformer - UL Listed, NEMA TP-1
Part Number: NT20P11S25CUEE
Quick Summary
Eaton NT20P11S25CUEE is a K-Factor nonlinear ventilated transformer for industrial power distribution. This design helps mitigate voltage fluctuation and thermal stress that shorten equipment life. UL Listed and NEMA TP-1 compliant, it also features a 150°C rise rating to perform in demanding environments. By delivering precise voltage regulation with selectable taps and copper windings, it combines reliability with efficiency. For procurement teams, the value is clear: long-term reliability, reduced maintenance, and seamless compatibility with standard switchgear and distribution panels.
Product Information
Extended Description
NT20P11S25CUEE Eaton: Eaton K-Factor nonlinear ventilated transformer, KT-13 (1-phase), PV 240 x 480V, Taps: 1 at +5%/2 at -5% x 2 at +2.5%/4 at -2.5%, SV 120/240V, 150°C rise, 25 kVA, Copper windings, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11S25CUEE
UPC
786680040214
Product Length/Depth
19.5 in
Product Height
37.53 in
Product Width
22.59 in
Product Weight
360 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
817
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Volt ampere rating
25 kVA
Phase
Single-phase
Primary voltage
240 x 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Special features
Electrostatically shielded
Weathershield
WS11
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT20P11S25CUEE
K-Factor nonlinear design with enhanced ventilation addresses harmonic currents and peak heating that plague non-linear loads. This results in steadier voltage regulation, reduced thermal stress on downstream equipment, and lower maintenance costs over the life of the transformer. In practice, it’s ideal for manufacturing lines, automated systems, and data-center edge applications where clean power is critical. Copper windings combined with a robust frame deliver low winding resistance and effective heat dissipation. The outcome is higher overall efficiency, cooler operation under heavy loading, and extended service intervals. The unit’s 360 lb weight and compact frame 817 are balanced for installation in standard electrical rooms with adequate clearance. Taps provide precise voltage regulation across varying input conditions, with 1 at +5%, 2 at -5%, and 2 at +2.5% plus 4 at -2.5%. This reduces voltage excursions seen by sensitive controls and drives, minimizing nuisance trips and protecting motor starters. It supports long feeders and varied supply quality common in industrial environments. Primary and secondary voltages align with common industrial power systems: 240/480 V input and 120/240 V output at 60 Hz, with single-phase operation. This simplifies panel integration, minimizes wiring complexity, and enables straightforward retrofits beside existing switchgear. The 25 kVA rating covers a broad range of feeder loads without oversizing equipment. Compliance and build quality matter in regulated environments. UL Listed and NEMA TP-1 compliant, plus a 150°C temperature rise rating, confirm suitability for demanding installations. Durable copper windings, a rigid 817 frame, and weather shield option WS11 enhance reliability in factory floors and outdoor enclosures alike. From a maintenance perspective, the transformer’s design supports reduced downtime and easier service. Its footprints align with standard installation footprints, and compatibility with common distribution panels streamlines procurement, installation, and future expansion. In short, NT20P11S25CUEE delivers predictable performance where it counts most in reliable electrical distribution for engineering teams and plant managers.
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FAQs
To install NT20P11S25CUEE in an industrial panel, verify panel space for a 19.5 in L x 22.59 in W x 37.53 in H footprint and 360 lb weight. Ensure adequate ventilation and clearance, mount with standard hardware, and connect 240/480 V primary and 120/240 V secondary conductors to appropriate lugs. Use the taps to set +5%, -5%, +2.5%, or -2.5% as needed, and confirm UL and NEMA TP-1 compliance in wiring methods.
Key specs include a 25 kVA single-phase rating, primary 240/480 V, secondary 120/240 V, 60 Hz operation, copper windings, and a frame size of 817. It offers taps for voltage regulation (+5%, -5%, +2.5%, -2.5%) and a 150°C rise rating, with UL Listed and NEMA TP-1 compliance.
Yes. Its 25 kVA capacity, single-phase design, copper windings, and K-Factor nonlinear performance make it suitable for data centers, automation panels, and manufacturing lines where harmonic loads and voltage stability are critical. The built-in taps and efficient cooling support reliable operation under varying loads.
The model is UL Listed and NEMA TP-1 compliant, with a 150°C rise rating. These certifications validate electrical safety, performance under elevated temperatures, and compliance with industry standards, reducing risk for installation in regulated facilities and simplifying procurement for qualified projects.
Eaton provides a warranty policy of 25-000, typically one year from the date of installation or 18 months from shipment, whichever occurs first. Support includes technical assistance, replacement parts, and access to Eaton’s transformer catalogs, datasheets, and service resources for ongoing maintenance and optimization.