Eaton QS44D11S15CU Marine Duty Transformer - UL Listed
Part Number: QS44D11S15CU
Quick Summary
Eaton QS44D11S15CU is a marine-duty encapsulated transformer that steps 440 V to 120/240 V for shipboard power. Onboard electrical systems face corrosion, space constraints, and exposure to weather; this unit provides reliable power wherever decks and holds demand it. Key certifications include UL Listed and a NEMA 3R enclosure, supporting safe indoor-outdoor service in marine environments. With copper windings, 15 kVA capacity, and 60 Hz operation, this transformer aligns with modern power-management strategies for cost efficiency and uptime. Designed for ease of installation, it supports straightforward wiring with a 16L15Q connection and standard tap options, reducing commissioning time and risk. Long-term reliability is supported by copper windings, rigid encapsulation, and a proven track record in naval and industrial power-distribution systems.
Product Information
Extended Description
QS44D11S15CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPM, copper, NEMA 3R, 182, 60 Hz, single-phase, 440 V, 120/240 V, 2 at +2.5% FCAN, 2 at -2.5% FCBN, 115 °C rise, 15 KVA, indoor-outdoor, 16L15Q
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
QS44D11S15CU
UPC
786680063664
Product Length/Depth
14.12 in
Product Height
23.31 in
Product Width
16.35 in
Product Weight
420 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
EPM
Enclosure
NEMA 3R
Frame
182
Tap size
2 at +2.5% FCAN, 2 at -2.5% FCBN
Type
Marine Duty Encapsulated Transformer
Wiring connection
16L15Q
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
440 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
15 kVA
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - QS44D11S15CU
Selling Policy 25-000 - Distribution and Control Products and Services
Copper windings reduce resistance losses and improve overall efficiency, delivering measurable energy savings on long cruises and in continuous duty applications. Impact: lower operating temperatures, longer insulation life, and reduced maintenance intervals. Application: shipboard lighting, control panels, and auxiliary drives where stable voltage is critical. EPM marine-duty encapsulation plus NEMA 3R enclosure provide robust weather resistance and dust protection, enabling indoor-outdoor installation on deck or in exposed machinery spaces. Impact: fewer weather-related failures, simplified logistics, and safer equipment operation. Application: outdoor electrical rooms and exposed rigging areas in harsh maritime environments. Tap size options of 2 at +2.5% FCAN and 2 at -2.5% FCBN maintain voltage regulation under load swings, minimizing nuisance trips and protecting sensitive loads. Impact: improved power quality, reduced downtime, and better control of auxiliary systems. Application: critical controls, sensors, and lighting circuits that demand consistent voltage. 15 kVA, 60 Hz, single-phase rating with copper windings and a compact frame supports a smaller installation footprint without sacrificing capacity. Wiring connection 16L15Q simplifies field wiring and reduces installation time. Impact: faster commissioning, easier panel integration, and lower labor costs. Application: marine electrical rooms and vessel power-distribution panels. UL listing plus Eaton warranty underscores safety, compliance, and long-term support. ROI benefits include predictable maintenance costs, extended service intervals, and alignment with standard procurement practices for marine transformers.
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FAQs
Install with proper enclosure access and solid mounting on a non-sparking surface. Verify 440 V primary and 120/240 V secondary compatibility, ensure space for the 182 frame, and confirm 16L15Q wiring can be accommodated in the vessel’s control panel. Use the +2.5% and -2.5% taps to fine-tune voltage under load, then commission per Eaton guidelines.
Key specs include 15 kVA VA rating, 60 Hz frequency, single-phase configuration, 440 V primary, 120/240 V secondary, and 115 °C rise. Copper windings improve efficiency. Taps provide voltage regulation (2 at +2.5% FCAN and 2 at -2.5% FCBN) to handle supply variations and protect sensitive loads.
Yes. It uses a marine-duty encapsulated design with a NEMA 3R enclosure, enabling indoor-outdoor service. UL Listed certification adds safety and compliance, making it appropriate for deck-mounted or exposed equipment rooms while resisting moisture and dust ingress.
The unit is UL Listed and features a NEMA 3R enclosure for environmental protection. These certifications support safe operation in maritime environments and simplify regulatory compliance during vessel inspections and maintenance planning.
Copper windings and robust encapsulation reduce losses and wear, improving reliability and extending service intervals. UL listing and Eaton warranty support long-term safety and serviceability, which translates to lower lifecycle costs and more predictable maintenance budgeting for fleets.