Eaton LY48D28T09CU Marine Duty Transformer - UL Listed
Part Number: LY48D28T09CU
Quick Summary
Eaton LY48D28T09CU is a marine-duty encapsulated transformer for rugged offshore and on-site power distribution. Engineers contend with weather exposure, maintenance downtime, and the challenge of maintaining stable 480 V service across harsh environments. UL Listed certification and NEMA 3R enclosure provide robust protection, while copper windings and a 60 Hz three-phase design support reliable performance. It operates at 60 Hz with 480 V primary and 208Y/120 V secondary, and features two taps at +2.5% FCAN and two taps at -2.5% FCBN for on-site voltage fine tuning. Together with a compact footprint and a 9 kVA rating, the LY48D28T09CU delivers predictable power distribution for marine and industrial projects, simplifying procurement and installation.
Product Information
Extended Description
LY48D28T09CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPTM, copper, NEMA 3R, 103, 60 Hz, three-phase, 480 V, 208Y/120 V, 2 at +2.5% FCAN, 2 at -2.5% FCBN, 115 °C rise, 9 KVA, indoor-outdoor, 72B09L
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
LY48D28T09CU
UPC
786680031984
Product Length/Depth
10.01 in
Product Height
15.9 in
Product Width
16.93 in
Product Weight
219 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
103
Tap size
2 at +2.5% FCAN, 2 at -2.5% FCBN
Type
Marine Duty Encapsulated Transformer
Wiring connection
72B09L
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
208Y/120 V
Temperature rise
115 °C rise
Volt ampere rating
9 kVA
Weathershield
Indoor-Outdoor
Feature: Marine duty encapsulated design (EPTM) shields windings from moisture and contaminants, reducing corrosion and failure risk. Business Impact: This translates to longer service intervals and lower maintenance costs in salt-air and splash-prone environments. Application: Ideal for vessels, offshore platforms, and outdoor electrical closets. Feature: Copper windings deliver lower copper losses and higher conductivity. Business Impact: Improves efficiency and thermal performance under load, reducing operating costs. Application: Suitable for high-demand, continuous-duty scenarios on ships and offshore rigs. Feature: 9 kVA rating with a 480 V to 208Y/120 V output in a three-phase, 60 Hz system. Business Impact: Enables compact, reliable voltage transformation for control panels and motors without oversizing. Application: Marine electrical distribution requiring stable 3-phase power. Feature: Tap settings 2 at +2.5% FCAN and 2 at -2.5% FCBN for voltage regulation. Business Impact: Maintains output within tight tolerances to protect sensitive instrumentation. Application: Critical PLCs and instrumentation in variable loads. Feature: UL Listed certification and NEMA 3R enclosure with indoor-outdoor compatibility. Business Impact: Provides compliance confidence and rugged installation capability. Application: Procurement and installation workflows for shipyards, OEMs, and industrial facilities.
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FAQs
For installation, ensure adequate clearance around the 16.93 in width and 15.9 in height, and plan for the 219 lb weight. Use the 72B09L wiring connection and respect the NEMA 3R indoor-outdoor enclosure to protect against moisture and corrosion. Verify 60 Hz, three-phase input of 480 V and output of 208Y/120 V, and account for the +/− tap settings for voltage regulation.
The LY48D28T09CU is a 9 kVA, three-phase transformer with a 480 V primary and 208Y/120 V secondary, operating at 60 Hz. Copper windings reduce losses, and the unit includes taps at +2.5% FCAN and −2.5% FCBN to maintain stable voltage under varying loads. It is UL Listed and designed for indoor-outdoor applications.
Yes. The design is explicitly marine-duty encapsulated with an indoor-outdoor capable enclosure (NEMA 3R) and copper windings, built to withstand salt spray, humidity, and temperature fluctuations typical of vessels and offshore platforms. The UL Listing further supports compliance for marine electrical installations.
The LY48D28T09CU carries UL Listed certification, and Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This combination supports regulatory compliance, risk reduction, and predictable maintenance planning for procurement and retrofits.
By combining a compact 9 kVA footprint with robust copper windings and a rugged encapsulated design, the transformer reduces downtime and maintenance costs, improves voltage stability for sensitive equipment, and simplifies spares handling. Its voltage taps and durable enclosure enable reliable operation in harsh environments, delivering lower total cost of ownership for marine and industrial customers.