Eaton LY44M28T45CU Marine Duty Transformer - UL Listed
Part Number: LY44M28T45CU
Quick Summary
The Eaton LY44M28T45CU marine duty transformer provides reliable, three-phase power for marine and outdoor electrical systems. In harsh marine environments, moisture, vibration, and weather exposure threaten uptime and maintenance costs. This unit features UL Listed certification and a NEMA 3R enclosure for weather resistance, plus Weathershield indoor-outdoor suitability. With a 45 kVA rating, 440 V primary and 208Y/120 V secondary, it integrates with common plant and shipboard distributions to reduce voltage drops and downtime. Backed by Eaton's warranty policy, it offers predictable service life and service support.
Product Information
Extended Description
LY44M28T45CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPTM, copper, NEMA 3R, 244, 60 Hz, three-phase, 440 V, 208Y/120 V, 2 at +2.5% FCAN, 4 at -2.5% FCBN, 115 °C rise, 45 KVA, indoor-outdoor, 84O45L
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
LY44M28T45CU
UPC
786680060830
Product Length/Depth
14.66 in
Product Height
28.15 in
Product Width
26.58 in
Product Weight
805 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
244
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
Marine Duty Encapsulated Transformer
Wiring connection
84O45L
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
440 V
Secondary Voltage
208Y/120 V
Temperature rise
115 °C rise
Volt ampere rating
45 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - LY44M28T45CU
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Marine duty encapsulated design with copper windings provides superior moisture resistance and rugged operation. Business Impact: Enhances reliability in salt spray and vibration-prone environments, reducing unplanned maintenance and extending service life. Application: Ideal for shipboard power distribution and outdoor substations where enclosure integrity is critical. Feature: NEMA 3R enclosure with Weathershield indoor-outdoor suitability enables safe outdoor installation and simplified compliance. Business Impact: Protects critical loads from weather and dust, lowering risk of outages and inspection findings. Application: Deck-mounted panels and exposed outdoor equipment in marine facilities. Feature: Tap changes (2 at +2.5% FCAN, 4 at -2.5% FCBN) deliver precise voltage regulation under fluctuating loads. Business Impact: Minimizes voltage drop and protects sensitive equipment, improving performance and lifespan. Application: Motors, drives, and lighting circuits with variable load. Feature: Three-phase, 60 Hz operation with 440 V primary and 208Y/120 V secondary supports standard industrial and maritime power systems. Business Impact: Simplifies integration with existing power distribution, reducing commissioning time. Application: Shipboard switchgear and industrial panels. Feature: 45 kVA rating with 115 °C rise and copper windings optimizes efficiency and heat management. Business Impact: Supports high-demand loads while maintaining insulation integrity, lowering operating costs. Application: Motor starters, pumps, and lighting on vessels. Feature: UL Listed certification and warranty provisions provide compliance and risk mitigation. Business Impact: Streamlines procurement and reduces warranty uncertainty. Application: Regulated environments and long-term asset management in marine and outdoor facilities.
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FAQs
Begin with a level, ventilated mounting surface and maintain proper clearance for cooling. Verify the NEMA 3R enclosure integrity and ensure the unit is protected from excessive moisture and salt spray. Connect the primary 440 V supply and secondary 208Y/120 V distribution per the engineering drawings, then validate voltage with the included tap settings. Follow manufacturer guidelines for torque, cable sizing, and protective devices to ensure safe, compliant operation.
The transformer is three-phase with a 440 V primary and 208Y/120 V secondary, operating at 60 Hz. It offers taps at 2 at +2.5% FCAN and 4 at -2.5% FCBN to support voltage regulation under load changes. This enables tighter voltage control across varying shipboard loads and reduces voltage-related equipment stress and downtime.
Yes, LY44M28T45CU is UL Listed, ensuring compliance with recognized safety standards. It also features a NEMA 3R enclosure for weather resistance and is suitable for indoor-outdoor use in marine environments. The unit’s construction aligns with industrial and maritime regulatory expectations, supporting procurement and maintenance programs with clear certification references.
A 45 kVA transformer comfortably supports typical shipboard power distributions, including motor drives, pumps, and lighting circuits with moderate peak demand. Its copper windings and 115 °C rise rating help maintain insulation integrity during high-load periods. For best results, balance loads to avoid sustained near-full-load conditions and leverage the voltage taps to keep outputs within spec.
Copper windings offer superior electrical conductivity and thermal performance, improving efficiency and reducing I2R losses. In marine service, this translates to cooler operation, longer insulation life, and lower maintenance frequency. The combination with encapsulated construction and a rugged enclosure further mitigates corrosion and moisture ingress in harsh environments.