Eaton T20P11E50NV Transformer DS-3 Dry-Type UL Listed
Part Number: T20P11E50NV
Quick Summary
The Eaton T20P11E50NV transformer delivers reliable power distribution for industrial control panels. Facilities often battle dust, tight spaces, and overheating that drive maintenance costs and downtime. This unit’s totally enclosed non-ventilated DS-3 dry-type design minimizes dust ingress and reduces cooling requirements in compact electrical rooms. UL Listed certification supports safety compliance in everyday plant operation, while the 150°C rise insulation provides rugged performance under peak loads. With a 50 kVA rating, primary options of 240/480 V and a secondary of 120/240 V, it offers practical versatility for panel builders and end users. The design supports quick installation, straightforward tap changes, and predictable lifecycle costs, aligning with efficiency goals and long-term capital planning.
Product Information
Extended Description
T20P11E50NV 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
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
T20P11E50NV
UPC
786680046797
Product Length/Depth
23.84 in
Product Height
42.03 in
Product Width
24.22 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
Catalog Notes
Totally enclosed non-ventilated DS-3 or DT-3
Coil material
Aluminum
Design
DS-3
Frame
820N
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
Special features
Electrostatically shielded
Feature: Totally enclosed non-ventilated DS-3 design. Business Impact: Reduces dust ingress and eliminates venting paths, lowering maintenance in harsh or confined spaces. Application: Ideal for indoor distribution panels and tight electrical rooms where cleanliness and reliability matter. Feature: Adjustable taps for precise voltage regulation. Business Impact: Maintains equipment performance under load swings and supply variation, reducing device stress and uptime risk. Application: Beneficial in facilities with marginal utility voltage or dynamic loads on 240/480 V primary systems. Feature: 50 kVA single-phase rating with 240/480 V primary and 120/240 V secondary. Business Impact: Enables flexible deployment across multiple panels and feeder configurations, supporting standard low-voltage distribution. Application: Suitable for control houses, machine centers, and process lines. Feature: Aluminum coil material and 150°C insulation rise. Business Impact: Improves thermal tolerance and corrosion resistance while maintaining efficiency, extending service life in challenging environments. Application: Harsh industrial environments and high-load panels where heat rise is a concern. Feature: Electrostatic shielding and DS-3 frame 820N. Business Impact: Enhances reliability and safety with reduced EMI and robust mounting, simplifying installation and service. Application: Enclosures with sensitive electronics and space-constrained installations. Feature: UL Listed certification and catalog notes for DS-3/DT-3 configurations. Business Impact: Supports compliance with safety standards and simplifies procurement for regulated facilities. Application: End users pursuing formal safety approvals and integration with standard Eaton catalog offerings.
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FAQs
Plan for a dry, indoor location to maximize the DS-3 enclosure's dust suppression. Ensure a stable mounting surface compatible with the 820N frame and allow clear access to the taps for periodic voltage adjustments. Use proper clearance for heat dissipation and route primary and secondary conductors per local codes to simplify wiring and maintenance.
The unit provides taps at +5% FCAN, -5% FCBN (×2), +2.5% FCAN (×2), and -2.5% FCBN (×4). Selecting the proper tap maintains voltage within tolerance, protecting downstream equipment from over- or under-voltage conditions and reducing nuisance tripping on downstream controls and motors.
Yes. The totally enclosed non-ventilated (DS-3) design, aluminum coil construction, and 150°C insulation rise make it well-suited for indoor distribution panels in environments with dust or moderate temperature variation, provided you keep the unit within its rated ambient and enclosure guidelines and ensure adequate ventilation around the installation.
The transformer is UL Listed, confirming compliance with recognized electrical safety standards. It also aligns with DS-3 or DT-3 enclosure configurations for dry-type distribution. These certifications simplify procurement for regulated facilities and help support adherence to plant safety programs.
Maintenance is minimized by the totally enclosed non-ventilated design, reducing dust ingress and cooling needs. The 50 kVA rating and rugged insulation enable long service life, lowering lifecycle costs. Regular visual inspections, tap position checks, and quick-access safe-locks on the enclosure are typically sufficient for reliable operation.