Eaton NT20P11F25EE Transformer - NEMA TP-1 Efficient
Part Number: NT20P11F25EE
Quick Summary
NT20P11F25EE transformer is a K-Factor nonlinear ventilated transformer used for reliable power distribution in industrial facilities. Engineers often wrestle with voltage sag, cooling limits, and limited tap options under dynamic loads. UL Listed and NEMA TP-1 compliant, with a 25 kVA rating and 60 Hz operation, reinforce safety and compatibility. By delivering optimized voltage regulation and reliable cooling, it supports lean maintenance cycles and predictable facility uptime. Its tap configuration, 1 at +5%, 2 at -5% and 2 at +2.5%/4 at -2.5%, supports precise voltage tailoring in variable loads. With a rugged aluminum coil, 25 kVA rating, and 115°C rise, the unit balances efficiency and thermal margin for demanding electrical rooms.
Product Information
Extended Description
NT20P11F25EE 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, 115°C rise, 25 kVA, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11F25EE
UPC
786680050701
Product Length/Depth
20.36 in
Product Height
37.59 in
Product Width
22.89 in
Product Weight
380 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
818
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
115 °C rise
Special features
Electrostatically shielded
Weathershield
WS11
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT20P11F25EE
Feature: K-Factor nonlinear ventilated design → Business Impact: improved thermal headroom and reduced overheating risk → Application: factory automation, robotics, and critical control panels. Feature: 25 kVA single-phase rating with 60 Hz operation → Business Impact: reliable power delivery for fluctuating loads, minimizing voltage sag → Application: industrial distribution and automation equipment. Feature: Primary 240x480 V and secondary 120/240 V windings with adjustable taps → Business Impact: precise voltage tailoring to site conditions, enhanced regulatory compliance → Application: electrical rooms, machine feeders, and control panels. Feature: Tap changer with 1 at +5%, 2 at -5%, and 2 at +2.5%/4 at -2.5% → Business Impact: tight voltage control reduces nuisance trips and equipment stress → Application: dynamic manufacturing lines and multi-panel systems. Feature: Aluminum coil, frame 818, 115°C rise, and weather shield compatibility WS11 → Business Impact: rugged, thermally safe construction enabling flexible installation and longer service life → Application: indoor and outdoor installations, data centers, and harsh environments.
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FAQs
NT20P11F25EE is a single-phase 25 kVA transformer with a primary winding of 240x480 V and a secondary of 120/240 V. When installing, account for its frame 818 dimensions, 380 lb weight, and required ventilation. Ensure clearance for the 115°C rise and use proper mounting hardware and protective enclosures. The unit’s UL Listed and NEMA TP-1 compliant design supports safer, standards-aligned installations.
The transformer offers taps: 1 at +5%, 2 at -5%, and 2 at +2.5% with 4 at -2.5%, enabling precise site voltage tailoring. This helps compensate for line drop and load variations, reducing voltage sag in critical automation equipment and control panels, and minimizing nuisance trips in dynamic manufacturing environments.
Yes. The NT20P11F25EE is UL Listed and NEMA TP-1 compliant, reflecting rigorous safety and efficiency standards for low-voltage distribution transformers. This compliance supports safer operation in facilities and aligns with industry requirements for industrial power management and distribution systems.
Ideal for factory automation, control panels, and distributed power systems in manufacturing and data centers, the NT20P11F25EE delivers stable voltages, robust cooling, and reliable performance at 60 Hz. Its 25 kVA rating and NEMA TP-1 efficiency make it a strong fit for critical loads with variable demands.
The transformer’s rugged aluminum coil, 115°C rise rating, and weather-shield option WS11 reduce cooling constraints and environmental impact, lowering maintenance intervals and replacement risk. The reliable UL Listed/NEMA TP-1 compliance enhances asset uptime and predictable ROI through improved uptime and reduced energy losses in power distribution.