Eaton T20P11B15CUNV Totally enclosed, non-ventilated transformer - UL Listed
Part Number: T20P11B15CUNV
Quick Summary
Eaton T20P11B15CUNV is a totally enclosed non-ventilated transformer for compact, reliable power isolation in industrial control panels. In harsh environments, cooling and maintenance demands of ventilated designs can erode uptime and increase operating costs. UL Listed certification and a robust NEMA 3R enclosure support safe operation across indoor-outdoor spaces, while the DS-3 design and copper windings boost longevity and performance. This solution aligns with procurement goals for efficient, low-maintenance power conversion in distributed automation systems, and works well alongside Eaton’s broader low-voltage distribution ecosystem to simplify design and spare-part compatibility.
Product Information
Extended Description
T20P11B15CUNV Eaton: Eaton Totally enclosed non-vent. transformer, DS-3E, 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, 80°C, 15 kVA, Cu windings, FR818N, 3XA, 60 Hz
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
T20P11B15CUNV
UPC
786680104299
Product Length/Depth
20.36 in
Product Height
37.59 in
Product Width
22.89 in
Product Weight
451 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
Coil material
Copper
Design
DS-3
Enclosure
NEMA 3R
Frame
818N
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
Totally enclosed, non-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
80 °C rise
Volt ampere rating
15 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - T20P11B15CUNV
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Totally enclosed non-ventilated design reduces exposure to dust, moisture, and contaminants. Business Impact: Lower maintenance costs and fewer cooling requirements translate to higher uptime in harsh environments. Application: Ideal for control panels and machine enclosures where ventilation is impractical. Feature: 15 kVA, single-phase, 60 Hz operation with primary 240/480 V and secondary 120/240 V. Business Impact: Flexible load handling and straightforward integration with common industrial power rails. Application: Powering small to mid-size automation loads and instrument panels in manufacturing lines. Feature: Tap changer options — 1 at +5% FCAN, 2 at -5% FCBN × 2 at +2.5% FCAN, 4 at -2.5% FCBN. Business Impact: Voltage tuning to compensate for line drops or supply fluctuations without re-wiring. Application: Critical in facilities with long feeders or variable utility voltage. Feature: NEMA 3R enclosure with indoor-outdoor compatibility (Weathershield Indoor-Outdoor). Business Impact: Enables safe outdoor or semi-exposed installations, reducing site-specific enclosures and mounting constraints. Application: Outdoor transformer pads, equipment rooms adjacent to production floors, or exterior electrical rooms. Feature: Copper windings and 80°C temperature rise specification. Business Impact: Higher reliability, efficient heat dissipation under load, and robust short-term overload tolerance. Application: Demanding industrial environments with tight thermal margins. Feature: DS-3 Design, FR818N frame, 3XA wiring, and UL Listed certification. Business Impact: Industry-standard form factor supports straightforward mounting, wiring, and compliance verification. Application: New builds or retrofits where standardization and approved sourcing are critical for project timelines.
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FAQs
This transformer uses a DS-3 design with an 818N frame and 3XA wiring. It supports primary connections at 240/480 V and secondary at 120/240 V, with taps for voltage adjustment (+5% FCAN, -5% FCBN, ±2.5%). Proper mounting on compatible pads or enclosures and following standard conduit routes ensures safe, code-compliant installation.
The unit is single-phase, 15 kVA, 60 Hz, with a primary of 240 V/480 V and secondary of 120/240 V. It uses copper windings and has an 80 °C rise rating. Voltage taps provide fine adjustment to compensate for supply variations, supporting stable downstream equipment operation.
Yes. It features a NEMA 3R enclosure with Weathershield Indoor-Outdoor capabilities, UL Listed certification, and is designed for environments where outdoor exposure or moisture is a concern, reducing the need for extra enclosures.
The transformer carries UL Listed certification and uses a robust DS-3 enclosure. It carries Eaton’s warranty policy: one year from installation or eighteen months from shipment, whichever occurs first, offering solid protection against early-life defects.
Typical use cases include powering control panels, machine tools, and process automation equipment with stable 120/240 V secondary output. ROI benefits come from reduced maintenance, lower cooling requirements due to the non-ventilated design, and improved uptime in harsh environments, as well as easy integration with existing 240/480 V power rails.