Eaton Y57D28T75CU Transformer - 75 kVA, NEMA 3R UL Listed
Part Number: Y57D28T75CU
Quick Summary
The Eaton Y57D28T75CU transformer is a general-purpose encapsulated transformer designed for reliable power isolation and distribution in industrial facilities. For engineers facing outdoor exposure, maintenance complexity, and reliability gaps in critical plant feeders, this unit’s rugged NEMA 3R enclosure and copper windings help reduce fault risk and downtime. UL Listed for safety and designed for indoor-outdoor service, the transformer is well-suited to demanding environments. With a 575 V primary and 208Y/120 V secondary, it scales to mid-sized distribution needs while simplifying installation, serviceability, and compliance in industrial electrical rooms.
Product Information
Extended Description
Y57D28T75CU Eaton: Eaton General purpose encapsulated transformer, EPT, copper, NEMA 3R, 245, 60 Hz, three-phase, 575 V, 208Y/120 V, 2 at +2.5% FCAN, 2 at -2.5% FCBN, 115 °C rise, 75 KVA, indoor-outdoor, 65U
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
Y57D28T75CU
UPC
786685268149
Product Length/Depth
15.68 in
Product Height
32.06 in
Product Width
30.29 in
Product Weight
1539.5 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
EPT
Enclosure
NEMA 3R
Frame
245
Tap size
2 at +2.5% FCAN, 2 at -2.5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
65U
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
575 V
Secondary Voltage
208Y/120 V
Temperature rise
115 °C rise
Volt ampere rating
75 kVA
Weathershield
Indoor-Outdoor
Feature copper windings and encapsulated EPT design → Improves thermal performance and electrical reliability, reducing hot spots and insulation wear in harsh environments. Application: factory floors and outdoor installations benefit from consistent voltage delivery and longer service life. Business impact: lower maintenance costs and fewer unplanned outages, enabling higher uptime for critical lines. Feature 2 at +2.5% FCAN, 2 at -2.5% FCBN taps → Precise voltage regulation under fluctuating loads, enhancing equipment performance and protection. Application: motor drives and control panels that demand tight voltage control; Business impact: improved process stability and reduced equipment stress. NEMA 3R enclosure and three-phase 75 kVA rating → Durable, weather-resistant power distribution ready for indoor-outdoor use. Application: data centers, manufacturing lines, and distribution panels; Business impact: simplified site requirements and faster start-up. Feature copper coil material and 60 Hz operation → High efficiency and compatibility with standard power systems; Application: retrofit projects and new builds alike. Business impact: energy savings and easier integration with existing electrical infrastructure. Compatibility and installation advantages: 65U wiring connection and standardized footprint facilitate straightforward panel mounting and wiring, reducing installation time and field labor costs. Industry context: rugged, encapsulated transformers from Eaton are trusted for field reliability in demanding industrial settings.
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FAQs
The Y57D28T75CU is a three-phase transformer with a NEMA 3R enclosure designed for indoor-outdoor use. It measures approximately 30.29 in wide, 32.06 in high, and 15.68 in deep, with a weight near 1,539.5 lb. Plan for solid concrete or vibration-free mounting, and ensure access for wiring terminations at the 65U connection. Adequate clearance and ventilation support cooling in continuous-duty applications.
Key specs include a 75 kVA rating, 575 V primary, and 208Y/120 V secondary, with a 60 Hz frequency and three-phase design. The unit provides taps at +2.5% FCAN and -2.5% FCBN for voltage regulation, and uses copper windings. This configuration supports stable distribution to panels and motors, while enabling precise voltage control under load variations.
Yes. The transformer’s 75 kVA rating and 575 V to 208Y/120 V secondary are compatible with mid-size data centers and manufacturing lines requiring reliable isolation and distribution. Its indoor-outdoor NEMA 3R enclosure provides robust protection, while the copper windings and 60 Hz three-phase design align with common facility electrical systems, reducing integration risk and downtime.
The Eaton Y57D28T75CU is UL Listed, ensuring safety compliance for electrical equipment in industrial settings. The NEMA 3R enclosure supports outdoor installation with rain and corrosion resistance. These certifications and ratings help streamline procurement, commissioning, and maintenance while meeting regulatory expectations for critical power infrastructure.
The unit follows Eaton’s warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This provides warranty coverage for defects and reliability issues. For maintenance or performance concerns, coordinate with Eaton’s technical support to optimize lifecycle costs and ensure imminent ROI through reduced unplanned downtime.