Eaton T20P11S50CUZZ Open-core transformer - UL Recognized
Part Number: T20P11S50CUZZ
Quick Summary
The Eaton T20P11S50CUZZ open-core transformer provides reliable dry-type distribution for electrical panels and switchgear. Engineers often struggle with heat buildup, noise, and voltage drift when expanding capacity in confined spaces. The unit is UL Recognized, and its open-core ventilated DS-3C design supports effective heat dissipation and long-term reliability. With a 50 kVA rating, primary voltages of 240/480 V and a secondary of 120/240 V, it offers flexible integration for varied load profiles. Copper windings and a 150 °C rise enable robust performance in demanding environments. This combination translates to safer installations, lower maintenance costs, and more predictable power quality across critical systems.
Product Information
Extended Description
T20P11S50CUZZ Eaton: Dry type distribution vent. transformer, DS-3C, Single-phase, Prim. voltage: 240 x 480V, Taps: 1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN, Sec. voltage: 120/240V, 150°C, 50 kVA, Cu windings, FR818, 3XA
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
T20P11S50CUZZ
UPC
786680104558
Product Length/Depth
20.36 in
Product Height
37.59 in
Product Width
22.89 in
Product Weight
436 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
Copper
Design
DS-3
Enclosure
C-C
Frame
818
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, ventilated transformer
Wiring connection
3XA
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Volt ampere rating
50 kVA
Weathershield
WS11
Open-core, ventilated design enables rapid heat dissipation and reduces hotspot formation, extending insulation life and lowering unplanned downtime. This translates to higher panel reliability in continuous operation environments and simpler cooling planning for compact control rooms. The transformer features a versatile tap program: 1 at +5% FCAN, 2 at -5% FCBN, x 2 at +2.5% FCAN, and 4 at -2.5% FCBN, enabling tighter voltage regulation under load swings and minimizing equipment wear for PLCs, drives, and sensors. Copper windings provide improved I2R loss performance, boosting efficiency, reducing operating temperatures, and extending winding life in high-duty applications like packaging lines and material-handling systems. With 60 Hz single-phase operation and a 50 kVA rating, the unit integrates smoothly into distribution panels and control centers while maintaining steady performance in moderate environments. The DS-3 open-type core and coil assembly simplifies wiring and servicing, and the WS11 weather shield extends life in exposed or semi-indoor installations, supporting long-term reliability and lower lifecycle costs.
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FAQs
The T20P11S50CUZZ is designed for open-core, DS-3C installations in dry-type environments. It supports 240/480 V primary and 120/240 V secondary in single-phase configurations, with 60 Hz operation. Ensure adequate ventilation, clearances around the unit, and compliant wiring connections (Wiring connection: 3XA) to maintain heat dissipation and meet space constraints in control panels.
Key specs include a 50 kVA rating, 60 Hz frequency, single-phase configuration, primary 240/480 V, secondary 120/240 V, and a 150 °C rise. The transformer offers taps at 1 at +5% FCAN, 2 at -5% FCBN, and 2 at +2.5% FCAN plus 4 at -2.5% FCBN, enabling voltage regulation under load variations and improving output stability for downstream equipment.
Ideal for electrical panels, control rooms, and machine automation environments in manufacturing, packaging, and material handling. Its open-core, ventilated design supports reliable operation in confined spaces, while the 50 kVA rating provides sufficient headroom for panel feeders and localized distribution without overbuilding the electrical footprint.
This model is UL Recognized, confirming compliance with safety and electrical standards for industrial distribution equipment. When specifying for regulated installations, verify regional requirements and ensure integration with existing UL-listed panels and accessories to maintain overall system certification.
Maintenance benefits stem from the dry-type, open-core design which reduces oil-related considerations and supports easier routine checks. Copper windings and robust cooling minimize thermal stress and extend life, lowering replacement and downtime costs. The WS11 weather shield enhances durability in less controlled environments, contributing to a lower total cost of ownership over the equipment lifecycle.