Eaton NT20P11F75EE Transformer - UL Listed, NEMA TP-1
Part Number: NT20P11F75EE
Quick Summary
The Eaton NT20P11F75EE transformer provides compact, reliable power conversion for medium-duty control panels and industrial IT rooms. Engineers often struggle with voltage tap changes, efficiency targets, and the burden of compliance documentation in power-distribution installs. UL Listed and NEMA TP-1 compliant, this unit also offers electrostatic shielding and robust single-phase performance for safer, code-ready installations. The combination of 75 kVA rating, 240/480 V primary, 120/240 V secondary, and 60 Hz operation supports reliable power distribution while reducing total cost of ownership in today’s facilities. This translates to quicker panel commissioning, fewer field adjustments, and improved energy efficiency across automation and distribution systems.
Product Information
Extended Description
NT20P11F75EE 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, 75 kVA, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11F75EE
UPC
786680051821
Product Length/Depth
33.97 in
Product Height
62.91 in
Product Width
29.97 in
Product Weight
0.001 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
821
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
75 kVA
Phase
Single-phase
Primary voltage
240 x 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Special features
Electrostatically shielded
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT20P11F75EE
The NT20P11F75EE uses a K-Factor nonlinear ventilated transformer design to deliver stable performance in demanding automation environments, improving energy efficiency and voltage regulation for critical loads in control cabinets and distribution panels. This translates to lower energy waste, fewer nuisance trips, and a smaller thermal footprint in cabinet spaces. Its field-tunable taps provide precise voltage tailoring to maintain equipment performance as supply conditions shift, reducing equipment stress and extending component life in process automation and manufacturing lines. With aluminum coil construction and a sturdy frame 821, it combines lightweight robustness with durable operation, enabling faster installation and easier service access in retrofit projects and new-build facilities. The unit’s UL Listed status and NEMA TP-1 compliance minimize commissioning risk and regulatory headaches for system integrators and OEMs. Electrostatic shielding adds EMI/RFI protection for sensitive electronics in data-rich control rooms and machine interfaces. The 60 Hz, single-phase configuration supports compact footprints in space-constrained panels, while the 75 kVA rating provides headroom for future expansion and peak loads in industrial distribution schemes. Tap configurations, including 1 at +5% FCAN, 2 at –5% FCBN, and additional 2 at +2.5% FCAN with 4 at –2.5% FCBN, enable precise tape adjustments to maintain voltage balance across critical loads, reducing harmonics-related issues and improving overall system reliability. This combination of features is particularly beneficial for facilities aiming to optimize energy use, meet evolving code requirements, and shorten time-to-operate in automation-heavy environments.
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FAQs
Power must be disconnected before any tap changes. Locate the tap changer markings: 1 at +5%, 2 at -5%, 2 at +2.5%, and 4 at -2.5% FCAN/FCBN as specified. Make changes only with the correct torque and use insulated tools. Verify voltage balance with a meter after re-energizing and document the configuration for commissioning.
The unit is a single-phase transformer rated at 75 kVA with a 60 Hz frequency rating. Primary voltage is 240 x 480 V, and secondary voltage is 120/240 V. It uses aluminum coil material, has a frame 821, and achieves a 115 °C rise. It is UL Listed and supports NEMA TP-1 compliant installations.
Yes. The transformer is ventilated with electrostatic shielding, UL Listed, and NEMA TP-1 compliant, making it appropriate for control panels, process automation cabinets, and distribution boards in harsh industrial environments. Its 75 kVA rating provides headroom for expansion, while the 240/480 V to 120/240 V configuration supports common automation loads.
The NT20P11F75EE is UL Listed and NEMA TP-1 compliant, with notes indicating NEMA TP-1 efficiency. These certifications verify safety, reliability, and efficiency for code-compliant installations, reducing risk during commissioning, simplifying audits, and helping to meet facility electrical standards in manufacturing and distribution environments.
Its 75 kVA capacity with 240/480 V to 120/240 V configuration supports future expansion while maintaining voltage stability, reducing downtime and nuisance trips. The UL/NEMA TP-1 certifications simplify maintenance and compliance, and the aluminum windings plus efficient design contribute to lower operating costs over the transformer’s life in industrial facilities.