Eaton NT20P11S15EE Transformer - NEMA TP-1 Efficient
Part Number: NT20P11S15EE
Quick Summary
Eaton NT20P11S15EE is a K-Factor nonlinear ventilated transformer for industrial power distribution. Engineers often wrestle with voltage stability and heat buildup in space-constrained panels, risking equipment downtime. This UL Listed, NEMA TP-1 efficient unit operates at 60 Hz as a single-phase 15 kVA transformer, with a 240/480 V primary and 120/240 V secondary. Its robust aluminum coils, 150°C rise, and selectable taps help maintain regulation under transient loads, reducing energy waste and extending component life. Ideal for OEMs, panel builders, and maintenance teams, it delivers reliable power with predictable performance, supporting scalable installations while enabling easier compliance and lower lifecycle costs.
Product Information
Extended Description
NT20P11S15EE 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, 15 kVA, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11S15EE
UPC
786680043536
Product Length/Depth
18.39 in
Product Height
31.3 in
Product Width
22.89 in
Product Weight
247 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
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
Volt ampere rating
15 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
WS11
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT20P11S15EE
Feature: 15 kVA single-phase transformer with 240/480 V primary and 120/240 V secondary. Business Impact: Provides adequate headroom for controlled loads and machine groups, improving voltage regulation and reducing brownouts. Application: Manufacturing lines and machine control panels benefit from consistent voltage delivery and simplified wiring schemes. Feature: K-Factor nonlinear design with ventilated cooling. Business Impact: Handles non-linear loads and higher inrush without overheating, lowering maintenance intervals. Application: CNC machines, inverters, and robotics stations in high-dynamic environments. Feature: Tap settings with 1 at +5%, 2 at -5%, and 2 at +2.5%, 4 at -2.5%. Business Impact: Fine-tunes voltage to match supply variations, enhancing protection of sensitive electronics. Application: Data logging, PLC inputs, and sensor networks requiring tight voltage control. Feature: Aluminum coil material and Frame 816. Business Impact: Lightweight yet durable construction improves mounting flexibility and serviceability. Application: Retrofit projects and new installations in industrial enclosures with limited space. Feature: 150°C rise and 60 Hz operation. Business Impact: Reliable performance in warm plant environments, enabling longer mean time between failures. Application: Outdoor-rated or challenging indoor installations with ambient heat. Feature: Compliance and protection—UL Listed, NEMA TP-1 efficient, Weathershield WS11 option. Business Impact: Reduces risk of non-compliance while delivering energy efficiency and weather protection. Application: Facilities requiring strict regulatory adherence and enhanced durability.
Get a Quick Quote for a Eaton NT20P11S15EE
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton NT20P11S15EE?
Enquire Now
FAQs
NT20P11S15EE uses a standard frame and mounting footprint (Frame 816) compatible with common industrial enclosures. Plan for the transformer’s 247 lb weight and ensure adequate ventilation. The aluminum coil construction aids mounting flexibility, while the tap settings allow voltage fine-tuning without additional equipment. Verify panel clearances and cooling to maintain 150°C rise ratings under load.
Designed for 60 Hz single-phase operation, the 15 kVA unit accommodates non-linear loads with a K-Factor nonlinear design and ventilated cooling. This configuration reduces overheating risk, maintains voltage stability during transient conditions, and supports reliable operation of power-sensitive devices such as drives, PLCs, and sensors in industrial environments.
Yes, the NT20P11S15EE is UL Listed and compliant with NEMA TP-1 efficiency standards. This certification ensures the transformer meets safety, energy efficiency, and performance criteria for industrial power distribution. For customers, it means easier regulatory approvals, simplified maintenance planning, and improved overall equipment reliability.
The 15 kVA NT20P11S15EE reduces energy waste through NEMA TP-1 efficiency and minimizes downtime due to robust construction and heat tolerance. Its tap-changing capability reduces voltage-related faults, and UL/NEMA compliance lowers risk of non-conformance. Over the lifecycle, expect improved uptime, lower energy costs, and simplified procurement for spare parts and service.
With a compact footprint for a 15 kVA unit and a robust 247 lb frame, the NT20P11S15EE is suitable for tight panel spaces. Its aluminum coils and ventilated design optimize air flow, while the defined tap settings support on-site voltage adjustments without extra components. Weathershield option WS11 adds protection in exposed or harsh environments.