Eaton RT20P11F37CUEE Transformer - UL Listed, TP-1
Part Number: RT20P11F37CUEE
Quick Summary
The Eaton RT20P11F37CUEE is a general-purpose ventilated transformer for marine duty, converting 240/480 V to 120/240 V. It helps engineers address voltage fluctuations, space limitations, and harsh environments that threaten uptime in offshore and shipboard installations. Certified UL Listed and ABS Certified with NEMA TP-1 efficiency, plus copper windings, reinforce safety, reliability, and long-term cost savings. With a rugged enclosure and straightforward taps, this transformer supports faster commissioning, easier maintenance, and predictable energy performance for critical systems.
Product Information
Extended Description
RT20P11F37CUEE Eaton: Eaton General purpose ventilated transformer, Marine-duty, DS-3 (1-phase), PV 240 x 480V, Taps: 1 at +5%/2 at -5% x 2 at +2.5%/4 at -2.5%, SV 120/240V, 115°C rise, 37.5 kVA, Copper windings, EE
Product Name
Eaton General purpose ventilated transformer
Catalog Number
RT20P11F37CUEE
UPC
786680043611
Product Length/Depth
20.36 in
Product Height
37.59 in
Product Width
22.89 in
Product Weight
450 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 ABS Certified
Catalog Notes
NEMA TP-1 efficient
Coil material
Copper
Enclosure
NEMA 2
Frame
818
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at 2.5% FCAN, 4 at -2.5% FCBN
Type
Marine Duty Transformer
Frequency rating
60 Hz
Primary voltage
240 x 480 V
Secondary Voltage
120/240 V
Volt ampere rating
37.5 kVA
Weathershield
WS11
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - RT20P11F37CUEE
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Marine-duty DS-3 single-phase design delivers dependable 37.5 kVA power conversion suitable for shipboard power distribution and offshore platforms. Business Impact → Ensures stable control power and loads, reducing voltage-related faults and downtime in harsh environments. Application → Ideal for marine environments requiring reliable 240/480 V input to 120/240 V output. Feature → Copper windings with 115°C rise rating deliver high current capability and improved thermal performance. Business Impact → Lower I²R losses and enhanced durability under hot, duty-cycle conditions, extending service life. Application → Suitable for continuous operation in engine rooms and compact electrical rooms on vessels. Feature → Tap changer options (+5%, -5%, ±2.5%) provide precise voltage regulation. Business Impact → Minimizes voltage drift under load, reducing nuisance tripping and equipment wear. Application → Useful in systems with variable input voltages from shore power or generators. Feature → NEMA 2 enclosure with WS11 weathershield offers robust environmental protection. Business Impact → Improves corrosion resistance and protection against dust, splash, and humidity, lowering maintenance costs. Application → Fits marine and industrial installations with moderate exposure. Feature → NEMA TP-1 efficient designation plus UL Listed and ABS Certified provide regulatory compliance and energy savings. Business Impact → Supports green initiatives and risk mitigation for audits, while maintaining performance. Application → Recommended for critical applications in marine, offshore, and industrial facilities. Feature → Physical footprint and weight (Frame 818, 20.36 in L × 37.59 in H × 22.89 in W; 450 lb) enable straightforward installation and mounting in constrained spaces. Business Impact → Simplifies space planning and reduces installation time, contributing to faster project timelines. Application → Ideal for retrofit or new builds in trailers, engine rooms, and electrical rooms on vessels.
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FAQs
This model uses a NEMA 2 enclosure with WS11 weather shield, designed for marine and industrial spaces. Plan for a robust mounting surface, adequate ventilation, and clearance for taps and wiring. The unit weighs about 450 lb, so ensure proper lifting gear and seismic/rigging considerations are included in the commissioning plan.
Primary voltage is 240 x 480 V with secondary 120/240 V. The transformer is rated at 37.5 kVA, operates at 60 Hz, and features taps: 1 at +5%, 2 at -5%, and 4 at -2.5%/+2.5%. Copper windings and a 115°C rise rating support reliable performance under demanding loads.
Yes. It is UL Listed and ABS Certified, with NEMA TP-1 efficiency. The marine-duty designation and copper-winding construction, combined with protective WS11 enclosure, make it suitable for offshore and shipboard power distribution while meeting essential safety and efficiency standards.
Warranty is one year from installation or eighteen months from shipment, per Eaton policy 25-000. Regular inspections of insulation, tap connections, and enclosure integrity help maintain performance, reduce unplanned downtime, and lower total cost of ownership over the life of the transformer.
Copper windings offer lower resistance and better heat dissipation, improving efficiency and load handling. TP-1 efficiency reduces energy losses in normal operation, delivering cost savings over time, especially in continuous-use marine and industrial applications with fluctuating loads.