Eaton T20P11E25NV Transformer - 25 kVA Shielded
Part Number: T20P11E25NV
Quick Summary
The Eaton T20P11E25NV transformer is a dry-type distribution device that steps 240/480 V down to 120/240 V for panel and plant workloads. Engineers often struggle with space constraints, cooling needs, and maintenance in compact switchgear where ventilated transformers don’t fit. This model aligns with common industry standards and is designed for reliable operation under a 150 °C rise, featuring electrostatic shielding and a DS-3 enclosure; always verify exact certifications with Eaton. With a 25 kVA rating and aluminum windings, the unit delivers consistent power delivery while reducing long-term ownership costs. The combination of a compact DS-3 footprint and a rugged frame supports installation in demanding environments, offering business-value through improved reliability and compatibility with modern control systems.
Product Information
Extended Description
T20P11E25NV 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, 25 kVA, Al windings, Elec. Shield, Frame: 818N
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
T20P11E25NV
UPC
786680048852
Product Length/Depth
20.36 in
Product Height
37.59 in
Product Width
22.89 in
Product Weight
385 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
Contact Manufacturer
Catalog Notes
Totally enclosed non-ventilated DS-3 or DT-3
Coil material
Aluminum
Design
DS-3
Frame
818N
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 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Special features
Electrostatically shielded
Feature → Business Impact → Application: Dry-type, totally enclosed non-ventilated DS-3 design reduces external cooling requirements and maintenance overhead, delivering reliable operation in indoor industrial spaces and switchgear cabinets. This translates to lower lifecycle costs and minimized downtime during hot weather or in dense installations. Application: machine control panels and distribution enclosures where limited ventilation exists. Feature → Aluminum windings and electrostatic shield minimize EMI and improve electrical noise performance, enhancing control stability and protective relays operation in demanding environments. Application: critical automation circuits and panel assemblies requiring clean power delivery. Feature → 25 kVA, single-phase, 60 Hz, primary 240/480 V, secondary 120/240 V, with taps at +5% FCAN, -5% FCBN and ±2.5% FCAN/FCBN provides flexible voltage regulation, improving compatibility with varied field conditions. Application: retrofit projects and new builds where transformer sizing must accommodate voltage tolerances. Feature → Frame 818N, DS-3, and 1-year warranty terms provide durable mounting and predictable service life, reducing commissioning risk. Application: industrial facilities seeking dependable, low-maintenance transformers with manufacturer-backed support. Feature → 150°C rise rating and rugged enclosure address peak-load events and fault-condition resilience, ensuring transformer integrity during surges and high-load periods. Application: power distribution centers and facility-macros where reliability under stress is critical. These design choices support easier installation, safer operation, and straightforward conformity with common industrial power distribution standards.
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FAQs
The T20P11E25NV provides a 240/480 V primary and a 120/240 V secondary for single-phase service at 60 Hz. Connect the primary to the supply using the appropriate wiring method for a DS-3 enclosure, observe the primary taps for voltage regulation (+5% FCAN, -5% FCBN, and ±2.5% variants), and connect the secondary to the load. Ensure proper grounding and follow local electrical codes during installation.
Key specs include a 25 kVA rating, single-phase operation, 60 Hz, primary 240/480 V, secondary 120/240 V, aluminum windings, electrostatic shield, frame 818N, and a 150 °C rise. It’s well-suited for indoor control panels, machine builds, and power distribution in compact spaces where vented transformers are impractical.
Yes, as a totally enclosed non-ventilated (DS-3) transformer it is designed for indoor industrial environments. Certifications for this model are not listed explicitly; confirm exact approvals with Eaton or your local authority having jurisdiction, as typical applications may involve CE marking and standard IEC/UL practices depending on your market.
Plan for a forklift-ready installation due to the 385 lb weight and frame 818N. The unit is designed for minimal maintenance as a dry-type, shielded transformer with a long service life. Ensure a clean, dry indoor environment, proper housing within the DS-3 enclosure, and adherence to Eaton’s warranty policy for service coverage and installation eligibility.
The transformer offers reliable power delivery with low maintenance due to its dry-type, shielded design, and DS-3 enclosure, reducing downtime and cooling costs. The 25 kVA rating supports scalable loading, while aluminum windings improve efficiency and heat performance. Overall, expect lower operating costs, simpler maintenance, and improved system availability over time.