Eaton LY48M28T30CU Marine Duty Transformer - UL Listed
Part Number: LY48M28T30CU
Quick Summary
The Eaton LY48M28T30CU Marine Duty Encapsulated Transformer is a rugged power transformer suited for marine and harsh outdoor applications. Engineers frequently struggle with moisture ingress, limited space, and high maintenance costs when deploying electrical distribution in difficult environments. This design carries UL Listed certification, a NEMA 3R enclosure for indoor-outdoor use, and copper windings that support dependable performance at 60 Hz. It is rated for 115 °C rise and supports 480 V primary to 208Y/120 V secondary in a three-phase configuration. For project teams, the combination of compact 30 kVA capacity and reliable marine duty features translates into faster installation, lower operating costs, and improved uptime in marine power distribution.
Product Information
Extended Description
LY48M28T30CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPTM, copper, NEMA 3R, 243, 60 Hz, three-phase, 480 V, 208Y/120 V, 2 at +2.5% FCAN, 4 at -2.5% FCBN, 115 °C rise, 30 KVA, indoor-outdoor, 84A30L
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
LY48M28T30CU
UPC
786680032004
Product Length/Depth
10.52 in
Product Height
17.38 in
Product Width
20 in
Product Weight
612 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
EPTM
Enclosure
NEMA 3R
Frame
243
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
Marine Duty Encapsulated Transformer
Wiring connection
84A30L
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
480 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 - LY48M28T30CU
Selling Policy 25-000 - Distribution and Control Products and Services
With a 30 kVA rating, three-phase configuration, and 480 V to 208Y/120 V output, this transformer provides reliable step-down for vessel distribution panels, reducing voltage drop on critical equipment. Copper windings and an encapsulated EPTM design minimize resistive losses and improve thermal performance, delivering steady efficiency under high-duty cycles in marine environments. The NEMA 3R enclosure and Weathershield support indoor-outdoor installations, delivering weather resistance against rain, salt spray, and temperature swings so crews can install right-sized transformers in outdoor or semi-exposed spaces. Tap settings of 2 at +2.5% FCAN and 4 at -2.5% FCBN enable on-site voltage regulation to counter line drops and fluctuating loads, improving motor starting and overall system stability. At roughly 612 lb with a 20 in width and 17.38 in height footprint, installation fits compact engine rooms while maintaining robust mechanical integrity. The 60 Hz, three-phase design aligns with standard utility and marine power distribution practices, while the UL Listed certification provides safety compliance and procurement confidence for shipyards and offshore sites.
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FAQs
For marine installations, plan a sturdy, corrosion-resistant mounting base and provide adequate clearance for cooling and service access. The transformer weighs about 612 lb and uses a 20 in wide by 17.38 in tall footprint with a 10.52 in depth, so verify deck or bulkhead mounting strength and space in the engine room or deck locker. Use the NEMA 3R enclosure and indoor-outdoor design to tolerate salt spray and humidity, and ensure proper separate protection for high-voltage terminations.
A 30 kVA rating offers ample headroom for typical vessel loads while keeping copper losses manageable. Design benefits include improved voltage regulation under varying loads and reduced risk of overloading transformers during peak motor starts. This translates to fewer on-board transformer failures, lower maintenance costs, and more reliable power distribution for auxiliary systems, pumps, and propulsion-related equipment.
Yes. The unit uses a NEMA 3R enclosure with Weathershield for indoor-outdoor use, enabling outdoor deployments in coastal environments. Copper windings and a marine-duty encapsulated design provide robust thermal and electrical performance. UL Listed certification further supports safety compliance, helping protect against moisture-related faults and ensuring dependable operation in salty, humid conditions.
The transformer carries UL Listed certification, a key safety standard for electrical equipment. This, combined with the NEMA 3R enclosure design, supports compliance with many marine and industrial installation codes. The UL listing simplifies procurement for shipyards and offshore facilities and reduces the risk of non-conformance during inspections and commissioning.
The LY48M28T30CU is built for long service life with copper windings and a rugged encapsulated construction, reducing routine maintenance needs. Eaton’s warranty policy offers one year from installation or eighteen months from shipment, whichever comes first, supplying a clear ownership window. The combination of reliability, weather resistance, and straightforward replacement parts supports lower total cost of ownership and improved asset uptime.