Eaton T20P11S37NV Transformer - UL Listed, DS-3, 37.5 kVA
Part Number: T20P11S37NV
Quick Summary
Eaton T20P11S37NV transformer is a single-phase dry-type distribution unit designed for reliable power delivery in industrial facilities. This totally enclosed non-ventilated design minimizes ventilation requirements and reduces heat and noise in tight electrical spaces. Key certifications include UL Listed safety compliance, with the unit offering 37.5 kVA capacity and 240/480 V primary stepping down to 120/240 V. Designed for DS-3 configurations, it supports efficient integration in power-management and distribution systems, helping control panels and switchgear stay compliant. The combination of rugged construction and flexible tapping supports quick deployment, lowering lifecycle costs and improving capital efficiency for industrial operations.
Product Information
Extended Description
T20P11S37NV 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, 37.5 kVA , Al windings, Frame: 819N
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
T20P11S37NV
UPC
786680023187
Product Length/Depth
23.84 in
Product Height
42.03 in
Product Width
24.22 in
Product Weight
581 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
819N
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
37.5 kVA
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Feature → Business Impact → Application: The DS-3 totally enclosed non-ventilated design reduces room cooling requirements and limits dust ingress, cutting maintenance costs. In practice, this means quieter operation and greater reliability in space-constrained switchrooms or manufacturing lines. Feature → Business Impact → Application: Aluminum windings with a robust 819N frame provide durable performance with lighter weight and excellent corrosion resistance, improving installation ease and service life in rugged environments. Feature → Business Impact → Application: A 240/480 V primary with a 120/240 V secondary and multiple taps delivers voltage flexibility across plants with mixed supply, reducing the need for additional step-down gear during upgrades. Feature → Business Impact → Application: 37.5 kVA at 60 Hz supports typical machine loads and panel distributions for steady, predictable performance, simplifying coordination with protective devices and existing distribution gear. Feature → Business Impact → Application: UL Listed certification and a 150°C rise rating align with strict safety and reliability standards, enabling operation in hotter plant spaces while meeting procurement requirements. Feature → Business Impact → Application: Catalog notes DS-3 or DT-3 and cross-compatibility with common distribution catalogs streamline commissioning, spare parts planning, and service support, lowering total cost of ownership for energy infrastructure projects.
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FAQs
For installation, ensure the unit can be mounted within the DS-3 enclosure footprint, accounting for its 23.84 in depth, 42.03 in height, and 24.22 in width. Plan for standard 60 Hz operation, 37.5 kVA load, and 240/480 V primary to 120/240 V secondary, with the aluminum-wound windings and frame 819N providing robust support in panel rooms.
This transformer is single-phase with a primary voltage of 240/480 V and a secondary voltage of 120/240 V. It operates at 60 Hz and offers voltage-tap options for ±5% and ±2.5% adjustments to accommodate site voltage variations and load changes in industrial power-distribution schemes.
Yes, the T20P11S37NV is UL Listed, ensuring compliance with safety standards for electrical equipment. The warranty follows Eaton’s policy 25-000 and provides one year from installation or eighteen months from shipment, whichever comes first, offering protection against manufacturing defects during typical deployment scenarios.
The transformer features taps at 1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, and 4 at -2.5% FCBN, enabling precise voltage regulation under varying loads and input conditions. This capability helps maintain stable secondary voltage for sensitive equipment and reduces the risk of equipment malfunctions or nuisance tripping in fluctuating power environments.
Best suited for industrial power distribution, panel assemblies, and control rooms where space is at a premium and ventilation is limited. Its DS-3 designation, aluminum windings, and 37.5 kVA rating make it ideal for machine centers, process lines, and distribution cabinets requiring reliable, low-maintenance power conditioning with UL safety compliance.