Eaton NT20P11S15CU Transformer - UL Listed K-13 Nonlinear
Part Number: NT20P11S15CU
Quick Summary
Eaton NT20P11S15CU transformer provides efficient power conditioning for control panels and motor control centers. Designers often struggle with voltage fluctuations and limited space, making a compact, robust solution essential. This UL Listed unit features a K-13 nonlinear ventilated design with copper windings, engineered for reliability at 60 Hz and a 150°C rise. By offering 240/480 V primary and 120/240 V secondary with accessible taps, it enables flexible installations in tight panels. The frame 816, WS11 weather shield, and proven Eaton build quality help reduce installation time, boost uptime, and lower total cost of ownership for industrial power distribution.
Product Information
Extended Description
NT20P11S15CU Eaton: K-Factor nonlinear ventilated transformer K-13, Single-phase, PV: 240 X 480V, Taps: 1 at 0.05 FCAN, 2 at -0.05 FCBN X 2 at 0.025 FCAN, 4 at -0.025 FCBN, SV: 120/240V, 150°C
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11S15CU
UPC
786680024856
Product Length/Depth
18.39 in
Product Height
31.3 in
Product Width
22.89 in
Product Weight
1 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
Copper
Type
Ventilated transformer
Design
K-13
Frame
816
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
15 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
WS11
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT20P11S15CU
Feature → Business Impact → Application: K-Factor nonlinear ventilated design (K-13) reduces localized overheating and improves transient tolerance, delivering safer operation in demanding environments and lowering risk of insulation damage in MCCs and control panels. This translates to higher uptime and lower maintenance costs, especially in high-variance electrical systems. Feature → Copper coil construction provides superior conductivity and thermal efficiency, which reduces copper loss and improves overall efficiency; ideal for continuous duty control feeders and power conditioning in automation cabinets. Feature → Primary 240/480 V and secondary 120/240 V with selectable taps (1 at +5% FCAN, 2 at -5% FCBN, 2 at +2.5% FCAN, 4 at -2.5% FCBN) enables quick voltage adjustment on-site, minimizing sits-on-hand inventory and enabling compatibility with mixed-voltage facilities. Feature → Single-phase 15 kVA rating aligns with common control-system power needs, offering scalable protection for panel boards and machine controls while maintaining compact footprint. Feature → 150°C rise temperature rating ensures reliability under peak loads and ambient conditions, reducing unnecessary shutoffs and enabling safer operation in industrial environments. Feature → Frame 816 and Weathershield WS11 support easier installation in constrained spaces and outdoor or harsh settings, delivering resilience without compromising form factor. Feature → UL Listed certification provides a well-recognized safety baseline, simplifying procurement and compliance processes for regulated facilities. Feature → 18.39 in length, 31.3 in height, 22.89 in width, and 1 lb weight reflect a compact, manageable footprint for quick integration into existing panels, reducing retrofit complexity. Feature → 60 Hz operation with copper windings reinforces compatibility with standard industrial power systems and ensures predictable performance in routine manufacturing environments. Feature → 120/240 V secondary output supports common distribution schemes for control circuits, relays, and instrumentation, streamlining wiring schemes and improving fault isolation.
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FAQs
Install NT20P11S15CU as a single-phase transformer with primary 240 V or 480 V and secondary 120/240 V. Use the taps for voltage adjustments: 1 at +5% FCAN, 2 at -5% FCBN, plus 2 at +2.5% FCAN and 4 at -2.5% FCBN. Ensure proper ventilation for the 150 °C rise rating and secure connections per UL Listed guidelines to maintain system safety and performance.
The K-13 design provides nonlinear voltage handling with ventilated cooling, reducing hot spots and thermal buildup during transients. This improves insulation life and reduces protective trips in control cabinets. In practice, it supports stable downstream electronics and relays, contributing to higher overall equipment reliability in automation environments.
Yes, the transformer features WS11 weather shielding and a ventilated design that helps manage heat in demanding environments. While it is UL Listed for safety, ensure installation locations match environmental ratings and that venting and enclosure provisions align with site conditions to maximize longevity and performance.
The NT20P11S15CU carries UL Listed certification, signaling compliance with established safety standards for electrical equipment. This simplifies procurement for regulated facilities and supports smooth integration into standard industrial power architectures, panel builds, and machine controls where safety compliance is a priority.
As a 15 kVA single-phase transformer with copper windings and a robust ventilated design, it delivers reliable voltage conditioning, reducing downtime from outages and voltage fluctuations. The built-in taps enable voltage adjustments without external transformers, lowering wiring complexity. UL safety certification and a favorable warranty further reduce lifecycle risk and maintenance costs in automated facilities.