Eaton T20P11S15CUEEZZ Open Core-Coil Transformer - NEMA TP-1
Part Number: T20P11S15CUEEZZ
Quick Summary
Open core-coil ventilated transformer reliably steps down 240/480 V to 120/240 V for control panels and distribution. Many engineers struggle with efficiency losses, heat buildup, and downtime during transformer commissioning. This unit is UL Listed and NEMA TP-1 compliant, with a 150 °C rise, ensuring safety and reliability in tough environments. With 15 kVA capacity, copper windings, and a compact EE frame, it supports reliable power distribution while reducing energy waste. For procurement teams, the open core design simplifies maintenance, lowers life-cycle costs, and aligns with standard busbar and panel layouts across facilities.
Product Information
Extended Description
T20P11S15CUEEZZ Eaton: Eaton Open core-coil ventilated transformer, DS-3 (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, Copper windings, EE, ZZ
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
T20P11S15CUEEZZ
UPC
786680061509
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
245 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, Open type core and coil assembly
Coil material
Copper
Frame
816C
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
Dry Type Distribution Transformer
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 x 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Volt ampere rating
15 kVA
Open core-coil ventilated construction reduces noise and heat, improving reliability in confined control rooms. This design translates to higher uptime and simpler maintenance in machine panels and distribution enclosures, while supporting 60 Hz industrial standards. Copper windings provide superior conductivity and heat dissipation, boosting voltage stability and reducing losses on 15 kVA service feeds used in critical equipment rooms. Tap changes (1 at +5%, 2 at -5%, 2 at +2.5%, 4 at -2.5%) enable on-site voltage regulation without auxiliary equipment, cutting installation time and spare-part costs. The dry-type, open-core profile minimizes oil-related risks and simplifies compliance in retrofit projects and new builds. UL Listed and NEMA TP-1 compliant status delivers regulatory assurance for safety, with a robust 150 °C rise supporting demanding environments. The 816C frame and 245 lb weight offer a compact footprint compatible with standard Eaton panels and compatible busbar layouts, easing mounting and service access.
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FAQs
This transformer uses a standard 240/480 V primary and 120/240 V secondary configuration and a compact 816C frame, designed to drop into common Eaton panel layouts and compatible distribution enclosures. The open-core, ventilated design reduces clearance issues and allows straightforward mounting alongside existing busbars. Wire routing and terminal access are optimized for single-phase installations, minimizing retrofits and service interruptions.
Key specs include a 60 Hz frequency rating, single-phase configuration, 15 kVA VA rating, and 150 °C rise. Copper windings improve thermal performance, while the voltage taps provide regulation at +5%, -5%, +2.5%, and -2.5%. This combination supports stable voltage delivery to sensitive loads in control panels and machine interfaces, reducing device malfunctions caused by line voltage fluctuations.
Yes. The unit is a dry-type distribution transformer with open-core construction, designed for indoor industrial use. Its 15 kVA rating, copper windings, and 60 Hz operation are ideal for panel boards and machine rooms requiring reliable step-down power. The open-core, ventilated design helps manage heat in confined spaces, while the frame and weight support easy installation and serviceability in typical plant environments.
The transformer is UL Listed and NEMA TP-1 compliant, providing safety and efficiency assurances for industrial installations. Compliance with NEMA TP-1 supports energy efficiency standards, and UL listing ensures adherence to electrical safety requirements. These certifications are especially important for panel manufacturers and facilities seeking regulatory-ready components for retrofit or new-build projects.
Investing in the Eaton T20P11S15CUEEZZ delivers measurable ROI through improved energy efficiency from copper windings, reduced heat-related losses, and lower maintenance costs thanks to a robust dry-type design with fewer oil-related risks. The voltage-tap options minimize external regulators, cutting installation time and spare-parts needs. UL/NEMA TP-1 compliance also reduces compliance risk and potential downtime during audits.