Eaton NT20P11S50EE Transformer - NEMA TP-1 Efficient
Part Number: NT20P11S50EE
Quick Summary
The Eaton NT20P11S50EE transformer is a single-phase K-Factor nonlinear device that delivers reliable power conversion for industrial control panels and distribution cabinets. Engineers often face heat buildup and voltage drift in compact enclosures, leading to reduced reliability. UL Listed and NEMA TP-1 compliant, with notes on NEMA TP-1 efficiency and an aluminum coil design, this transformer aligns with modern efficiency and safety standards while supporting scalable power in 240/480 V systems.
Product Information
Extended Description
NT20P11S50EE 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, 50 kVA, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11S50EE
UPC
786680043567
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 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
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
50 kVA
Phase
Single-phase
Primary voltage
240 x 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Special features
Electrostatically shielded
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT20P11S50EE
The NT20P11S50EE provides a 50 kVA, single-phase footprint optimized for industrial power distribution, delivering consistent voltage in control cabinets and automation panels. This translates to reduced downtime and improved equipment lifespan, especially in environments with non-linear loads and harmonics. Its K-Factor nonlinear design minimizes harmonic heating, enabling safer operation in panelboards and machine rooms while maintaining peak efficiency. With 60 Hz operation and 240/480 V primary alongside 120/240 V secondary, it offers seamless integration into existing electrical infrastructures, limiting the need for additional transformers or adapters. The aluminum coil reduces weight and procurement costs, while electrostatic shielding minimizes EMI risks in proximity to sensitive automation electronics. Tap adjustments (1 at +5%, 2 at -5%, and 2 at +2.5%/4 at -2.5%) provide voltage compensation for fluctuating supply conditions, improving regulation and performance in variable-grid scenarios. The unit’s 150°C rise rating supports compact installations with adequate cooling, and UL Listed plus NEMA TP-1 compliance ensures regulatory alignment for industrial facilities. The included warranty (25-000) offers confident protection against manufacturing defects for a year from installation or 18 months from shipment, whichever comes first, supporting total cost of ownership considerations.
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FAQs
NT20P11S50EE is a single-phase 50 kVA transformer with a 240/480 V primary and a 120/240 V secondary, designed for 60 Hz operation. It supports standard control panel wiring with unified voltage ratios and includes taps for voltage compensation. Compatible enclosure provisions and aluminum coil construction simplify installation in common industrial cabinets, reducing procurement complexity and field wiring costs.
The K-Factor nonlinear design addresses non-linear load harmonics to reduce stray losses and overheating, improving overall efficiency under typical industrial load profiles. In a 60 Hz system, this translates to lower thermal rise, steadier output voltage, and longer component life, all while maintaining compliance with NEMA TP-1 efficiency expectations for modern distribution equipment.
Yes. With 50 kVA capacity, 240/480 V primary and 120/240 V secondary outputs, and a conservative 150°C rise, the NT20P11S50EE is well-suited for automation control panels and related switchgear. Its ventilated, electrostatically shielded design minimizes EMI concerns, supporting reliable operation in busy production lines and transfer switch assemblies.
The transformer is UL Listed and NEMA TP-1 compliant, with NEMA TP-1 efficiency notes. These certifications ensure regulatory readiness for many industrial facilities and electrical distribution environments, supporting safety, reliability, and energy-performance requirements in panelboards, switchgear, and automated equipment installations.
ROI is enhanced by 50 kVA capacity aligned to common automation loads, reduced energy waste through NEMA TP-1 efficiency, and robust electrostatic shielding lowering EMI-related downtime. Routine maintenance is typical for LV transformers, focusing on enclosure integrity and thermal management; the 18-month shipment warranty or 1-year installation warranty provides risk mitigation during early operation.