Eaton S20L11S15CU General-Purpose Transformer - UL Listed
Part Number: S20L11S15CU
Quick Summary
The Eaton S20L11S15CU General-Purpose Transformer provides reliable control power for industrial panels and machinery. Operators and engineers often struggle with space constraints, weather exposure, and complex installation in live environments. UL Listed certification and a NEMA 3R enclosure support safety and durability for indoor-outdoor service. With a 15 kVA rating, copper windings, and taps at -5% FCBN plus -2.5% FCBN, it maintains voltage under fluctuating inputs. This design reduces downtime and installation risk while enabling efficient power distribution in automation and control applications. Its compact frame and compatibility with standard control panels simplify procurement, installation, and service for industrial operations.
Product Information
Extended Description
S20L11S15CU 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
S20L11S15CU
UPC
786680033018
Product Length/Depth
10.52 in
Product Height
19 in
Product Width
13.38 in
Product Weight
215 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
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: General-purpose encapsulated design provides rugged, indoor-outdoor-ready power transformation in a compact frame. This enables reduced enclosure footprint and simplified installation, lowering panel depth and wiring complexity. Application: control panels and industrial automation cabinets where space is limited and reliability is critical. Feature: 15 kVA rating delivers ample load support for typical automation feeders and motor-control circuits. This prevents overloading and reduces the need for paralleling smaller transformers, cutting material costs and maintenance intervals. Application: machine tools, conveyors, and process equipment requiring stable control power. Feature: Dual tap options (-5% FCBN and -2.5% FCBN) offer voltage regulation across supply variations. This keeps downstream controls within tolerance, protecting sensors and actuators from transient voltage and improving uptime. Application: environments with fluctuating line voltage or long feeder runs. Feature: NEMA 3R enclosure with Weathershield supports indoor-outdoor service. This enables outdoor or semi-protected installations, reducing indoor space needs and enabling flexible panel placement. Application: plant floors, outdoor-rated cabinets, remote-mounted panels. Feature: Single-phase operation with copper windings and a 60 Hz rating ensures compatibility with common industrial systems. This provides reliable magnetic performance and efficient energy transfer. Application: standard plant distribution and control circuits. Feature: UL Listed certification and Eaton warranty policy deliver safety compliance and post-sale support. This reduces procurement risk and accelerates project timelines. Application: any installation requiring formal safety verification and ongoing service.
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FAQs
For indoor-outdoor installation, ensure adequate clearance around the NEMA 3R enclosure and secure mounting to a rigid surface. The unit’s footprint (approximately 10.52 in depth x 13.38 in width x 19 in height) fits standard control cabinet layouts, reducing panel depth. Use proper wiring discipline, preserve short feeder runs, and follow manufacturer torque specs for 23A winding connections to maintain reliability.
The transformer features a primary voltage of 240 V or 480 V and a secondary voltage of 120/240 V. It operates at 60 Hz and is designed for single-phase systems. Dual taps at -5% and -2.5% FCBN help maintain output within tolerance under line fluctuation, supporting stable control power for sensitive devices.
Yes, the S20L11S15CU is UL Listed, indicating it meets recognized safety standards for electrical equipment. This facilitates compliance with safety codes in many regions, simplifies procurement for regulated facilities, and supports risk mitigation in mission-critical control panels and automation cabinets.
The transformer uses copper windings and specifies a 115 °C rise, which reflects robust thermal performance under load. Copper windings offer high conductivity and durability, translating to lower I2R losses and longer service life, especially important in continuous-control applications and harsh industrial environments.
Common uses include powering control circuits for machine tools, conveyors, sensors, and automation equipment within industrial plants. The 15 kVA rating, 240/480 V primary, 120/240 V secondary, and indoor-outdoor NEMA 3R enclosure make it a versatile choice for panel builders seeking reliable, compact power transformation with straightforward installation and regulatory compliance.