Eaton NT20P11S50 K-Factor ventilated transformer - UL Listed
Part Number: NT20P11S50
Quick Summary
Eaton NT20P11S50 K-Factor nonlinear ventilated transformer is designed to condition power for industrial control panels. Engineers often grapple with overheating, voltage sags, and load-induced instability that disrupts critical equipment. This unit’s ventilated, aluminum-windings design helps manage high harmonic loads while maintaining reliable output under demanding conditions. UL Listed certification underpins safety compliance for electrical installations in commercial and industrial environments. With a 50 kVA rating, 60 Hz operation, and primary voltages of 240/480 V against a 120/240 V secondary, it supports scalable control architectures. In addition to robust performance, the product integrates seamlessly with frame 819 installations and WS16 weather protection, delivering lifecycle value, reduced downtime, and easier procurement for projects that demand reliability and compliance.
Product Information
Extended Description
NT20P11S50 Eaton: K-Factor Transformer, Ventilated, K-13, Single-phase, PV: 240 X 480V, Taps: 1 at +5% FCAN, 2 at -5% FCBN X 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 120/240V, 150°C, 50 kVA , Al windings, Elec. Shield, Frame: 819, uses WS16
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11S50
UPC
786680024580
Product Length/Depth
23.84 in
Product Height
42.03 in
Product Width
24.22 in
Product Weight
519 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
UL Listed
Coil material
Aluminum
Type
Ventilated transformer
Design
K-13
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
Kva Rating
50 kVA
Phase
Single-phase
Primary voltage
240 V, 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 - NT20P11S50
Feature: K-Factor nonlinear design provides optimized performance under non-sinusoidal loading → Business Impact: improves power quality and reduces overheating risk in harmonic-rich environments → Application: automation panels and factory drives where load harmonics are common. Feature: Ventilated construction with aluminum windings → Business Impact: increases cooling capability and energy efficiency, extending transformer life → Application: high-ambient workshops and outdoor installations with limited ventilation. Feature: Comprehensive tap settings (+5%, -5%, ±2.5%) → Business Impact: precise voltage regulation to stabilize sensitive electronics and motors → Application: critical control circuits and robotics where supply fluctuation affects performance. Feature: 60 Hz, 50 kVA, single-phase configuration → Business Impact: predictable sizing for quick procurement and consistent fault response → Application: medium-scale control panels and process machines. Feature: Electrostatic shield and WS16 weather shield compatibility → Business Impact: EMI reduction, improved safety margins, and weather-ready installation → Application: indoor/outdoor substations and exposed industrial sites. Feature: Frame 819 with WS16 compatibility → Business Impact: simplifies mounting, reduces integration time, lowers installation costs → Application: OEM panels and retrofit projects seeking fast deployment. Feature: UL Listed certification and Eaton warranty → Business Impact: mitigates compliance risk and supports serviceability → Application: procurement-ready solutions for regulated facilities and ongoing maintenance planning.
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FAQs
NT20P11S50 is designed for straightforward integration with Eaton’s WS16 weather shield and a frame 819 footprint. Ensure proper clearance and ventilation around the unit, use the frame mounting holes specified for stability, and follow the catalog recommendations for electrical connections to maintain performance and warranty coverage. This approach minimizes installation time and mitigates venting-related restrictions in tight cabinets.
The transformer features a K-Factor nonlinear design, which optimizes performance under non-linear loads common in drives and switching equipment. This reduces overheating risk and helps maintain voltage stability, improving reliability for sensitive PLCs, servo drives, and line reactors. In practice, you’ll see fewer trip events and steadier outputs even during peak harmonic activity.
Yes. The unit is engineered for 60 Hz operation with primary voltages of 240 V and 480 V and a secondary of 120/240 V. This makes it compatible with standard industrial power distribution layouts and simplifies integration into existing control panels and motor starter assemblies while delivering consistent voltage regulation.
NT20P11S50 carries UL Listed certification, which confirms adherence to recognized safety standards for electrical equipment. Complementary specifications are documented in Eaton’s datasheet and the commercial transformer catalog, along with the specification sheet for precise installation guidance and warranty terms. Access to these documents helps with audits, maintenance planning, and orderly procurement processes.
With aluminum windings, an electrostatic shield, and a robust ventilated design, the transformer exhibits improved thermal management and EMI suppression, contributing to longer service life and reduced downtime. The 50 kVA rating supports scalable expansions, while UL Listing and Eaton’s warranty offer predictable maintenance costs and reliable performance, delivering favorable total cost of ownership in control panels and process lines.