Eaton QS20N11S15CU Marine Duty Transformer - UL Listed
Part Number: QS20N11S15CU
Quick Summary
Eaton QS20N11S15CU marine duty encapsulated transformer provides rugged, offshore-ready power isolation for marine electrical systems. When space is tight and moisture is a constant concern, reliability and ease of maintenance are essential. UL Listed safety certification paired with a NEMA 3R enclosure rating ensures safe indoor-outdoor service in harsh environments. Designed as a compact 15 kVA, 60 Hz, single-phase solution with 240/480 V primary and 120/240 V secondary, it aligns with both industrial and marine standards. This combination reduces downtime, simplifies procurement, and supports compliance across shipyards, vessels, and offshore facilities, delivering business value through dependable power conversion for critical loads.
Product Information
Extended Description
QS20N11S15CU Eaton: Eaton Marine duty encapsulated transformer, marine duty encapsulated transformer, EPM, copper, NEMA 3R, 182, 60 Hz, single-phase, 240 V, 480 V, 120/240 V, NONE, 115 °C rise, 15 KVA, indoor-outdoor, 3A15Q
Product Name
Eaton Marine duty encapsulated transformer
Catalog Number
QS20N11S15CU
UPC
786680031878
Product Length/Depth
14.12 in
Product Height
23.31 in
Product Width
16.35 in
Product Weight
417 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
None
Type
Marine Duty Encapsulated Transformer
Wiring connection
3A15Q
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Volt ampere rating
15 kVA
Weathershield
Indoor-Outdoor
Feature: Encapsulated copper coil with Eaton EPM design provides robust resistance to moisture and vibration. Business Impact: Extends transformer life in corrosive marine atmospheres and reduces maintenance cycles. Application: Ideal for engine rooms and exposed locations on vessels where space is at a premium and reliability cannot be compromised. Feature: NEMA 3R enclosure for indoor-outdoor use. Business Impact: Enables installation in diverse environments without additional protective housings, lowering install time and total cost. Application: Dockside power rooms, weather-exposed compartments, and outdoor equipment bays. Feature: Single-phase 60 Hz operation at 15 kVA with 240 V or 480 V primary and 120/240 V secondary. Business Impact: Supports standard marine power architectures while offering flexible voltage conversion for equipment suites. Application: Marine controls, lighting, and auxiliary systems requiring clean, isolated power. Feature: Copper windings and precise temperature rise control (115 °C rise). Business Impact: Improves heat management, energy efficiency, and longevity under peak loads. Application: Continuous duty applications in crowded electrical cabinets aboard ships and offshore platforms. Feature: Indoor-Outdoor compatibility with a compact form factor and 182 frame. Business Impact: Simplifies retrofit projects and new builds by fitting common rack and cabinet footprints. Application: Onboard substations and machinery spaces where installation space is constrained. Feature: UL Listed certification and 18-month/one-year warranty policy. Business Impact: Reduces risk, enhances regulatory confidence, and supports warranty-based maintenance planning. Application: Procurement and compliance processes in marine and industrial facilities.
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FAQs
QS20N11S15CU is designed with a compact footprint and a rugged NEMA 3R enclosure for indoor-outdoor service. When installing in restricted engine rooms, ensure adequate clearance for cooling and access to wiring connections, verify mounting aligns with the 182 frame, and follow standard safety practices for encapsulated transformers to minimize heat buildup and facilitate maintenance.
This transformer operates at 60 Hz with a single phase. Primary voltage options are 240 V or 480 V, while the secondary voltage is 120/240 V. The VA rating is 15 kVA, and the unit uses copper windings with an 115 °C rise to support reliable operation under peak loads in marine environments.
Yes. The unit features a NEMA 3R enclosure and is rated for indoor-outdoor use, making it suitable for exposed marine spaces such as dockside rooms, weather-exposed compartments, and offshore facilities. The encapsulated design enhances moisture resistance and reduces maintenance needs in harsh conditions.
The QS20N11S15CU carries UL Listed certification, which verifies electrical safety for the intended use. The product is designed for rugged marine service with an indoor-outdoor rating, and Eaton’s warranty policy provides post-purchase support. Always verify local marine and electrical codes for final installation compliance.
With copper windings and a encapsulated EPM design in a rugged NEMA 3R enclosure, maintenance needs are reduced due to improved moisture resistance and vibration tolerance. The 15 kVA, 60 Hz, single-phase configuration supports broad equipment compatibility, leading to lower downtime, faster procurement, and a favorable total cost of ownership in marine or offshore facilities.