Eaton Y57M28T30CU General-Purpose Transformer - UL Listed
Part Number: Y57M28T30CU
Quick Summary
The Eaton Y57M28T30CU is a general-purpose encapsulated transformer designed for reliable power distribution in industrial facilities. When voltage stability and rugged service are critical, installers face space, weather, and safety constraints that slow projects. UL Listed safety certification and a NEMA 3R enclosure support indoor-outdoor operation, while copper windings and a 60 Hz rating ensure efficiency. This transformer is suited for 575 V to 208Y/120 V distribution in three-phase systems, delivering 30 kVA with precise tap settings. Engineering teams will appreciate the documented performance and Eaton's warranty policy for lifecycle cost management. Its 2 at +2.5% FCAN and 4 at -2.5% FCBN taps enable tight voltage regulation to reduce equipment wear. The heavy-duty, weather-resistant enclosure and robust copper windings support long service life in demanding environments.
Product Information
Extended Description
Y57M28T30CU Eaton: Eaton General purpose encapsulated transformer, EPT, copper, NEMA 3R, 243, 60 Hz, three-phase, 575 V, 208Y/120 V, 2 at +2.5% FCAN, 4 at -2.5% FCBN, 115 °C rise, 30 KVA, indoor-outdoor, 84AG
Product Name
Eaton General purpose encapsulated transformer
Catalog Number
Y57M28T30CU
UPC
786680095900
Product Length/Depth
10.52 in
Product Height
17.38 in
Product Width
20 in
Product Weight
595 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
243
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
General-Purpose Encapsulated Transformer
Wiring connection
84AG
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
575 V
Secondary Voltage
208Y/120 V
Temperature rise
115 °C rise
Volt ampere rating
30 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - Y57M28T30CU
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Encapsulated copper-wound design (EPT) with a rugged NEMA 3R enclosure delivers durability in tough environments. Impact: Reduces weather-related maintenance and extends service life, lowering lifecycle costs. Application: Ideal for indoor-outdoor installations on factory floors, outdoor cabinets, and harsh plant areas. Feature: 30 kVA rating with 575 V primary and 208Y/120 V secondary in a three-phase, 60 Hz configuration. Impact: Supports mid-to-large loads from a single unit, simplifying distribution and reducing the need for multiple transformers. Application: Suitable for panels, motor control centers, and equipment feeders in manufacturing facilities. Feature: Tap settings of 2 at +2.5% FCAN and 4 at -2.5% FCBN. Impact: Enables precise voltage regulation to minimize downstream voltage drop and protect sensitive loads. Application: Used to compensate for supply variation across long feeders in industrial plants. Feature: Copper windings, 115 °C rise, 84AG wiring, and a footprint of about 10.52 in × 20 in × 17.38 in with 595 lb weight. Impact: High current capability with robust thermal performance and manageable installation planning. Application: Fits dedicated transformer spaces in dense facilities while enabling accessible servicing. Feature: UL Listed certification with indoor-outdoor protection (NEMA 3R) and Eaton warranty. Impact: Supports regulatory compliance, reduces risk during upgrades, and clarifies maintenance expectations. Application: Suitable for plant upgrades and new installations with defined warranty coverage (1 year from installation or 18 months from shipment).
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FAQs
The transformer uses copper windings and an 84AG wiring connection in a three-phase, 575 V primary to 208Y/120 V secondary configuration. It features a rugged NEMA 3R enclosure for indoor-outdoor service and weighs about 595 lb with dimensions approximately 10.52 in by 20 in by 17.38 in. Tap settings include 2 at +2.5% FCAN and 4 at -2.5% FCBN to fine-tune voltage on site.
Key specs include a 30 kVA rating, 60 Hz frequency, three-phase configuration, primary voltage 575 V and secondary voltage 208Y/120 V. Copper windings, 115 °C rise, and 84AG wiring support reliable performance. The unit is designed for indoor-outdoor use with a NEMA 3R enclosure and a ± tap regulation with two +2.5% taps and four -2.5% taps.
Yes. With a 30 kVA rating and three-phase 575 V to 208Y/120 V output, it can feed multiple loads from panels and motor control centers. The NEMA 3R enclosure and UL Listed certification provide protection in demanding environments, while the taps help stabilize voltage under changing line conditions, making it a good fit for manufacturing and distribution facilities.
The Y57M28T30CU is UL Listed, indicating compliance with essential electrical safety standards. It uses a NEMA 3R enclosure suitable for indoor-outdoor installation. Warranty terms are one year from date of installation or eighteen months from date of shipment, whichever occurs first, supporting lifecycle cost planning and service continuity.
Plan for its 595 lb weight and footprint (approximately 10.52 in × 20 in × 17.38 in) to ensure proper lifting, space, and access for maintenance. Use the 84AG wiring, copper windings, and taps for voltage regulation to minimize losses and protect downstream equipment, while UL Listed status helps meet regulatory requirements during upgrades.