Eaton S20L11E15CU General-Purpose Transformer - UL Listed
Part Number: S20L11E15CU
Quick Summary
The Eaton S20L11E15CU is a general-purpose encapsulated transformer for indoor and outdoor power distribution. Facilities often struggle with rugged, weatherproof units that fit tight spaces and minimize installation time. UL Listed protection and a NEMA 3R enclosure enable versatile, safe installation across varied environments, while copper windings support efficiency and longevity. Operating at 60 Hz with 240/480 V primaries and 120/240 V secondaries, it delivers 15 kVA of capacity with predictable regulation. This combination helps simplify procurement, improve reliability, and reduce ongoing operating costs for engineers and maintenance teams.
Product Information
Extended Description
S20L11E15CU Eaton: Eaton General purpose encapsulated transformer, EP, copper, NEMA 3R, 180, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, 2 at -5% FCBN X 4 at -2.5% FCBN, 115 °C rise, 15 KVA, indoor-outdoor, 526A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20L11E15CU
UPC
786680060496
Product Length/Depth
10.52 in
Product Height
19 in
Product Width
13.38 in
Product Weight
198 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
EP
Enclosure
NEMA 3R
Frame
180
Tap size
2 at -5% FCBN x 4 at -2.5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
526A
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
15 kVA
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Copper windings deliver lower resistance and improved thermal performance, reducing I²R losses and enhancing overall transformer efficiency. This translates to cooler operation, longer life, and lower energy costs in continuous-duty applications in commercial or light-industrial facilities. The NEMA 3R enclosure provides robust weather protection, enabling reliable indoor-outdoor installation and reducing corrosion risk in exposed locations. Tap settings of 2 at -5% FCBN x 4 at -2.5% FCBN offer flexible voltage regulation to accommodate downstream equipment and supply variations, minimizing external regulator needs and protecting sensitive loads. A 115 °C rise rating supports higher ambient temperatures and dense installations, while the electrostatic shielding further reduces EMI for cleaner control signals and safer operation. The 15 kVA rating paired with copper windings delivers dependable performance for panel builders, installers, and end users, with a compact footprint and straightforward wiring (526A). Plus, UL Listed certification and Eaton’s warranty provide confidence in compliance and long-term support for mission-critical power systems.
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FAQs
The S20L11E15CU uses copper windings and a 526A wiring connection with a compact footprint suitable for standard distribution panels. Typical installation involves mounting the unit in a protected space, connecting the primary 240/480 V supply to the primary terminals, wiring the 120/240 V secondary outputs to the load, and using the recommended 2 at -5% and 4 at -2.5% taps to optimize voltage under load. The NEMA 3R enclosure supports indoor-outdoor mounting, and the unit’s electrostatic shielding helps minimize EMI during panel integration.
Key specs include a 15 kVA rating, 60 Hz operation, single-phase configuration, primary voltage 240 V and 480 V, secondary voltage 120/240 V, and a 115 °C rise. The copper winding construction provides low resistance and improved efficiency, while the 60 Hz frequency ensures compatibility with standard industrial power systems. The voltage taps (2 at -5% and 4 at -2.5%) allow precise regulation to match downstream equipment requirements.
Yes. The S20L11E15CU features an indoor-outdoor NEMA 3R enclosure designed for varied environments, including damp or dusty spaces commonly found in light-industrial settings. Its weather-resistant construction, electrostatic shielding, and copper windings provide reliable performance with reduced maintenance, making it suitable for equipment rooms, outdoor panels, and protected exterior installations where space and safety matter.
The transformer is UL Listed, indicating safety certification for electrical equipment used in commercial and industrial applications. Its enclosure and design also support compliance with conventional safety and installation standards in many regions, while the NEMA 3R rating reinforces suitability for indoor-outdoor use in mixed environments.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever comes first, offering assurance on performance and durability. Benefit-wise, copper windings and robust enclosure design translate to lower long-term maintenance costs, fewer field failures, and improved energy efficiency, contributing to a favorable total cost of ownership in utility rooms and distributed power applications.