Eaton NT20P11S37EE Transformer - NEMA TP-1 Compliant
Part Number: NT20P11S37EE
Quick Summary
Eaton NT20P11S37EE transformer powers single‑phase control panels with efficient voltage conversion for industrial distribution. Engineers often grapple with balancing high inrush, heat, and enclosure space while meeting strict standards. This unit is UL Listed, NEMA TP-1 compliant, and designed for efficient operation with NEMA TP-1 efficiency notes, meeting both regulatory and performance expectations. Its robust design supports reliable power management in automation environments, making it a strong fit for panel builders and OEMs seeking a proven, space‑efficient transformer that pairs with existing Eaton ecosystems and third‑party equipment.
Product Information
Extended Description
NT20P11S37EE 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, 37.5 kVA, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11S37EE
UPC
786680043550
Product Length/Depth
23.84 in
Product Height
42.03 in
Product Width
24.22 in
Product Weight
580 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
819
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
37.5 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
WS16
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT20P11S37EE
Feature → Business Impact → Application: 37.5 kVA single‑phase K‑Factor nonlinear ventilated transformer delivers high reliability for critical loads, reducing outages and enabling safer, steadier control panel operation in demanding environments. Application: Industrial automation panels where stable secondary voltage is essential for PLCs, drives, and sensors. Feature → Business Impact → Application: Primary voltage 240/480 V with secondary 120/240 V supports versatile panel wiring and compatibility with common American electrical distributions. Application: New installs and retrofits in manufacturing lines and utility control rooms. Feature → Business Impact → Application: Aluminum coil construction reduces transformer weight and improves thermal performance, facilitating easier installation and lower mounting stress. Application: Retrofit projects in tight spaces where weight and heat dissipation are concerns. Feature → Business Impact → Application: 60 Hz operation and a 150 °C rise rating enable compact footprints without sacrificing thermal margins, boosting efficiency. Application: High‑density electrical rooms and machine enclosures. Feature → Business Impact → Application: Tap settings (1 at +5%, 2 at −5%, x2 at +2.5%, 4 at −2.5%) provide voltage flexibility to accommodate minor supply fluctuations, reducing voltage drops. Application: Data centers, manufacturing cells, and robotics work cells that require precise voltages. Feature → Business Impact → Application: NEMA TP‑1 efficient and UL Listed certification provide compliance confidence, reducing procurement risk and accelerating approvals. Application: Panel builders needing standards‑compliant, traceable components for regulated environments.
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FAQs
Installers should verify 37.5 kVA rating, 240/480 V primary and 120/240 V secondary connections, and mount the unit on a suitable frame (819). Use the available taps for voltage adjustment (+5%, −5%, +2.5%, −2.5%) and follow UL TP‑1 guidelines. The aluminum windings and ventilated design support efficient heat removal in tight panel spaces.
The transformer is single‑phase, 60 Hz, 37.5 kVA, with a 240/480 V primary and 120/240 V secondary. It features taps at +5%/−5% and +2.5%/−2.5%, a 150 °C rise rating, aluminum coil material, and a frame size of 819, making it suitable for compact, high‑reliability installations.
Yes. The NT20P11S37EE is UL Listed and compliant with NEMA TP‑1 standards, with NEMA TP‑1 efficiency characteristics noted in catalog data. This combination provides regulatory assurance and energy‑efficiency benefits for industrial power distribution within control panels.
Ideal for industrial automation and power distribution in control panels, machine tools, and manufacturing lines. Its 240/480 V primary to 120/240 V secondary support common facility wiring, while the K‑Factor nonlinear design helps manage stray losses and heat in high‑demand environments.
The unit carries a 25‑000 Eaton warranty with a 1‑year installation or 18‑months from shipment window. Maintenance is typically minimal beyond regular electrical checks. Weight and robust shielding contribute to long‑term reliability and reduced downtime, improving total cost of ownership in panel‑based automation.