Eaton S20L11S15CUSS Encapsulated Transformer - UL Listed
Part Number: S20L11S15CUSS
Quick Summary
The Eaton S20L11S15CUSS is a general-purpose encapsulated transformer that converts 240/480 V inputs to 120/240 V outputs for industrial control panels, power distribution, and related equipment. This design addresses reliability concerns in damp or outdoor environments where windings and enclosures are exposed to the elements. Key certifications include UL Listed status and a NEMA 3R enclosure suitable for indoor-outdoor service, plus a Grade 304 stainless steel enclosure note that enhances corrosion resistance. From a business perspective, the unit combines a compact footprint with copper windings and a robust 15 kVA rating, delivering consistent performance while simplifying installation and spare-part planning in control environments.
Product Information
Extended Description
S20L11S15CUSS Eaton: Eaton, general purpose encapsulated transformer, ep, single-phase, pv: 240 x 480v, taps: 2 at -5% fcbn x 4 at -2.5% fcbn, sv: 120/240v, 115°c, 15 kva, cu windings, frame: 180, indoor-outdoor
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S20L11S15CUSS
UPC
786680048074
Product Length/Depth
10.52 in
Product Height
19 in
Product Width
13.38 in
Product Weight
229 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
Grade 304 stainless steel enclosure
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
23A
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
Weathershield
Indoor-Outdoor
Feature → Business Impact → Application: Copper windings provide low resistance and high efficiency, reducing I2R losses and improving overall energy efficiency in continuous-duty applications. This translates to measurable operating cost savings in production lines and switchgear assemblies. Application: Ideal for motor control centers and machine panels where steady voltage is critical for reliable operation. Feature → Business Impact → Application: General-purpose encapsulated EP design with 60 Hz single-phase operation supports simple integration into existing controls architectures, minimizing retrofit complexity and downtime. Application: Suitable for new builds and retrofits in light-industrial settings. Feature → Business Impact → Application: Tap changes, 2 at -5% FCBN and 4 at -2.5% FCBN, enable precise voltage regulation to compensate for supply fluctuations, reducing equipment stress and improving performance. Application: Critical in environments with variable utility voltages. Feature → Business Impact → Application: NEMA 3R enclosure with Grade 304 stainless steel notes and Weathershield Indoor-Outdoor capability deliver outdoor-ready durability, lowering maintenance costs and extending service life in harsh environments. Application: Outdoor substations, exterior panels, and exposed dashboards. Feature → Business Impact → Application: 15 kVA rating paired with copper windings ensures robust headroom for control circuits and distribution loads, supporting scalable automation without oversizing. Application: Panel builders seeking plug-and-play reliability. Feature → Business Impact → Application: Compact frame and 180 mm footprint enable easier mounting in crowded panels and cabinets, reducing installation time and enabling standardized layouts across multiple machines. Application: OEMs and system integrators planning standardized enclosures. Feature → Business Impact → Application: UL Listed certification and warranty coverage provide regulatory compliance and peace of mind, mitigating risk for audits and maintenance budgeting. Application: Compliance-heavy environments and long-term service planning.
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FAQs
The S20L11S15CUSS is ideal for control panels and distribution feeders in machines and automation systems. With a 15 kVA rating and single-phase operation, it reliably converts 240/480 V inputs to 120/240 V outputs. Copper windings and a rugged enclosure support continuous operation in demanding environments, reducing panel downtime and maintenance needs.
Key specs include 60 Hz frequency, single-phase configuration, primary voltage 240 V and 480 V, secondary voltage 120/240 V, and a 15 kVA VA rating. Tap changes provide voltage regulation (-5% and -2.5%), while copper windings ensure efficient power transfer. The unit features a 180 frame and a 10.52 in length, 13.38 in width, 19 in height footprint.
Yes. It is designed for indoor-outdoor service with a NEMA 3R enclosure and Weathershield capability. The Grade 304 stainless steel enclosure notes add corrosion resistance, making it well-suited for damp or exterior installations while maintaining electrical protection and reducing maintenance costs.
The S20L11S15CUSS carries UL Listed certification, confirming compliance with safety standards. It includes a warranty of one year from installation or eighteen months from shipment, whichever occurs first, aligning with Eaton’s policy 25-000. These factors support regulatory audits and long-term maintenance budgeting.
Plan for a 229 lb unit with a 10.52 in depth, 13.38 in width, and 19 in height footprint. Ensure mounting on a compatible frame (180) and verify wiring connections (23A) to match your panel. Consider copper windings for driving low-resistance loads and the -5% and -2.5% tap options to compensate site voltage variations.