Eaton T20P11S50ZZ Open-core Transformer - UL Recognized
Part Number: T20P11S50ZZ
Quick Summary
Eaton Open-core ventilated transformer T20P11S50ZZ delivers reliable single-phase power distribution for critical facilities such as data centers and manufacturing plants. Engineers often grapple with transformers that overheat, lack precise taps, or fail safety certification, causing downtime and costly rewiring. UL Recognized certification supports compliance and safer operation, while the open-core, DS-3 design promotes efficient ventilation and straightforward maintenance. This unit's aluminum windings, 50 kVA rating, and multiple taps enable tight voltage regulation across varied loads, reducing energy waste and improving uptime. For buyers seeking a robust, dry-type distribution solution, this transformer pairs industry-standard performance with Eaton's warranty and service ecosystem, delivering a solid return on investment for power infrastructure.
Product Information
Extended Description
T20P11S50ZZ Eaton: General-Purpose Transformer, Ventilated, Dry Type Distribution, DS-3, Single-phase, PV: 240 X 480V, Taps: 1 at +5% FCAN, 2 at -5% FCBN X 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 120/240V, 150°C, 50 kVA , Al windings, Frame: 818C
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
T20P11S50ZZ
UPC
786680023231
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
277 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 Recognized
Catalog Notes
Open type core and coil assembly
Coil material
Aluminum
Design
DS-3
Frame
818C
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
Kva Rating
50 kVA
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - T20P11S50ZZ
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Open-core ventilated design enables superior cooling, reducing thermal stress and extending transformer life. Business impact: Lowered maintenance costs and higher uptime in hot, congested environments. Application: Dry-type distribution in manufacturing floors and data centers where ventilation is critical. Feature: 50 kVA rating with single-phase operation at 60 Hz, primary voltages of 240 V or 480 V, and secondary 120/240 V. Business impact: Flexible integration into standard power distribution panels with precise voltage regulation under varying loads. Application: Plant power feeds and control panels in industrial facilities. Feature: Tap changer with multiple options (1 at +5% FCAN, 2 at -5% FCBN, 2 at +2.5% FCAN, 4 at -2.5% FCBN). Business impact: Improved voltage stabilization without rewiring, reducing downtime and energy waste. Application: Critical machines and automation equipment during voltage swings. Feature: Aluminum windings and DS-3 frame 818C provide robust construction and efficient heat dissipation. Business impact: Enhanced thermal performance, longer service life, and better short-circuit resilience. Application: Harsh industrial environments requiring durable dry-type distribution transformers. Feature: UL Recognized and open-type core-coil assembly with catalog notes emphasizing open design. Business impact: Safer installation, streamlined serviceability, and smoother regulator compliance. Application: Electrical distribution upgrades in facilities prioritizing safety and maintenance accessibility.
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FAQs
The T20P11S50ZZ supports 240 V and 480 V primary inputs with a 120/240 V secondary, operating at 60 Hz. It features a multi-tap option: 1 at +5% FCAN, 2 at -5% FCBN, plus 2 at +2.5% FCAN and 4 at -2.5% FCBN, enabling precise voltage regulation without rewiring and simplifying site commissioning in standard power panels.
Key specs include a 50 kVA rating, single-phase configuration, primary options of 240/480 V, secondary 120/240 V, and a 60 Hz frequency rating. Aluminum windings and a 150°C rise indicate robust thermal performance suitable for ventilated, dry-type installations, with an open-core DS-3 frame designed for efficient heat dissipation and reliable operation.
Ideal for manufacturing facilities, data centers, and commercial/industrial power distribution, where open-core ventilation and strict safety standards are essential. Its 50 kVA capacity supports mid-range distribution needs, and the programmable taps help maintain stable voltages across fluctuating loads common in automation equipment and control panels.
The unit is UL Recognized, delivering safety compliance for electrical distribution equipment. The open-type core-coil assembly and DS-3 design align with industry practices for ventilated, dry-type transformers, aiding safer installation and streamlined regulatory reviews within industrial facilities.
Maintenance is simplified by the open-core, ventilated design and aluminum windings, reducing thermal stress and aging. The 50 kVA rating and tap options minimize energy waste and voltage fluctuations, delivering improved uptime and a favorable total cost of ownership when deployed alongside Eaton’s warranty and service ecosystem.