Eaton S27N11S05N General-Purpose Transformer - UL Listed
Part Number: S27N11S05N
Quick Summary
The Eaton S27N11S05N transformer provides reliable voltage conversion for control panels in industrial settings. Engineers often struggle with rugged environments, limited mounting space, and the need for weather-resilient equipment. This model is UL Listed and features a NEMA 3R enclosure, enabling indoor-outdoor installation without compromising safety or performance. Rated at 60 Hz with single-phase operation, it accepts 277 V input and delivers 120/240 V outputs, making it compatible with common building distribution schemes. Its aluminum coil minimizes weight and improves heat dissipation, while a 5 kVA rating supports a broad range of control loads. Easy mounting and robust construction translate to faster commissioning, reduced field service time, and lower lifecycle costs for electrical distribution systems.
Product Information
Extended Description
S27N11S05N Eaton: Eaton General purpose encapsulated transformer, EP, aluminum, NEMA 3R, 177, 60 Hz, single-phase, 277 V, 120/240 V, NONE, 115 °C rise, 5 KVA, indoor-outdoor, 524A
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
S27N11S05N
UPC
786680147036
Product Length/Depth
9.89 in
Product Height
16 in
Product Width
10.38 in
Product Weight
110 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
Model N
Coil material
Aluminum
Design
EP
Enclosure
NEMA 3R
Frame
177
Tap size
None
Type
General-Purpose Encapsulated Transformer
Wiring connection
524A
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
277 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
5 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - S27N11S05N
Selling Policy 25-000 - Distribution and Control Products and Services
The S27N11S05N delivers a 5 kVA encapsulated transformer with a 277 V primary and 120/240 V secondary, enabling clean voltage transformation and isolation for control panels in industrial environments. This reduces voltage fluctuations, improves circuit reliability, and drives consistent automation performance across manufacturing lines. The NEMA 3R enclosure provides indoor-outdoor capability, protecting critical components from dust, moisture and temperature swings, which shortens installation time and minimizes retrofit costs in retrofit projects. Aluminum winding lowers weight and enhances heat dissipation, improving handling during installation and reducing mechanical stress on mounting structures. UL Listed certification supports safety compliance and faster procurement in regulated facilities, while a 60 Hz, single-phase design aligns with standard building power, simplifying integration with MCCs and motor starters. The unit’s compact footprint (dimensions: 9.89 in L, 10.38 in W, 16 in H) and 110 lb weight enable flexible installation in crowded panels and serviceability during routine maintenance. Wiring connection 524A simplifies panel wiring and supports compatibility with Eaton distribution products, enabling quicker commissioning and reduced field rework.
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FAQs
Install the 5 kVA encapsulated transformer in a compliant control panel with space for the 9.89 in L, 10.38 in W, and 16 in H footprint. Connect the 277 V primary to the incoming supply and land the 120/240 V secondary to the load circuits. Use the 524A wiring connection as specified, ensure the enclosure is kept within the NEMA 3R rating, and verify 60 Hz operation for compatibility with existing equipment.
Key specs include a 5 kVA VA rating, single-phase operation at 60 Hz, primary voltage of 277 V, secondary voltage of 120/240 V, aluminum winding, and a 115°C rise. The device is UL Listed and designed for indoor-outdoor use with a NEMA 3R enclosure, making it suitable for a range of industrial control and distribution applications.
Yes. The transformer uses a NEMA 3R enclosure and is rated for indoor-outdoor service, providing weather resistance against dust, rain, and temperature fluctuations. This makes it well-suited for installations outside control rooms, in equipment yards, or on factory floors where environmental exposure is a consideration.
The model is UL Listed, indicating compliance with widely recognized safety standards and facilitating procurement and inspection in regulated facilities. The NEMA 3R enclosure further supports safety and reliability for indoor-outdoor use, reducing the need for additional protective enclosures and expediting commissioning in industrial environments.
The transformer requires minimal routine maintenance due to its encapsulated design and robust enclosure. Its 5 kVA rating supports scalable loads, while aluminum windings and a compact footprint reduce installation labor and space costs. Over time, predictable voltage regulation and lower field service time translate to improved uptime and a lower total cost of ownership in electrical distribution systems.