Eaton T55M11S50NV Transformer - UL Listed
Part Number: T55M11S50NV
Quick Summary
Eaton T55M11S50NV transformer is a dry-type distribution unit that reliably powers industrial control panels and facilities. Installers often battle space constraints, ventilation requirements, and maintenance costs when selecting a transformer. UL Listed safety certification is a key assurance, while the DS-3 design and aluminum windings support reliable, long service. This model integrates seamlessly with 550 V to 120/240 V configurations, delivering value for panel builders and maintenance teams. The unit's 50 kVA rating supports typical distribution loads in manufacturing lines and commercial spaces. Its 23.84 in length and 42.03 in height, paired with a 668 lb weight, provide a durable, robust footprint for demanding installations.
Product Information
Extended Description
T55M11S50NV Eaton: General-Purpose Transformer, Ventilated, Dry Type Distribution, DS-3, Single-phase, PV: 550V, Taps: 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 120/240V, 150°C, 50 kVA , Al windings, Frame: 820N
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
T55M11S50NV
UPC
786685223476
Product Length/Depth
23.84 in
Product Height
42.03 in
Product Width
24.22 in
Product Weight
668 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
Catalog Notes
Totally enclosed non-ventilated DS-3 or DT-3
Coil material
Aluminum
Design
DS-3
Frame
820N
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
Dry Type Distribution Transformer
Frequency rating
60 Hz
Kva Rating
50 kVA
Phase
Single-phase
Primary voltage
550 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Feature: Totally enclosed non-ventilated DS-3 dry-type transformer with aluminum windings. Business Impact: Reduces cooling demands and maintenance costs in indoor installations, while offering lasting electrical performance. Application: Ideal for control panels and compact distribution in manufacturing and facilities environments. Feature: 50 kVA single-phase rating with 550 V primary and 120/240 V secondary at 60 Hz. Business Impact: Aligns with common industrial power architectures, minimizing voltage drop and simplifying integration. Application: Data centers, machine shops, and process lines needing reliable step-down distribution. Feature: Tap changer options—two taps at +2.5% and four taps at -2.5%. Business Impact: Enables voltage regulation under varying loads, improving equipment performance and protection. Application: Critical loads such as PLCs and instrumentation. Feature: Frame 820N with dimensions 23.84 in L, 24.22 in W, 42.03 in H and weight of 668 lb. Business Impact: Facilitates precise installation planning, mounting compatibility, and robust enclosure fit. Application: Retrofit projects and new builds with space and structural considerations. Feature: UL Listed certification and Eaton’s warranty (one year from installation or 18 months from shipment). Business Impact: Supports safety compliance and post-sale support, reducing risk and total ownership costs. Application: Facilities and integrators needing regulatory assurance and reliable supplier backing.
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FAQs
Install the unit indoors in a dry, ventilated space suitable for a large, rigid transformer. Use standard mounting rails and secure the 820N frame to a solid panel or enclosure. Connect the 550 V primary and 120/240 V secondary according to local codes, ensuring proper insulation, clearance, and compatible overcurrent protection. The transformer’s DS-3 casing minimizes dust ingress and simplifies panel layout.
Key specs include a 50 kVA rating, single-phase configuration, 60 Hz frequency, 550 V primary, and 120/240 V secondary. It features taps at +2.5% FCAN and -2.5% FCBN to accommodate voltage fluctuations. Windings are aluminum, and the unit is UL Listed, with a DS-3 design suitable for dry indoor installations.
Yes. The 50 kVA rating supports common distribution loads in manufacturing lines and can serve panel-powered equipment in data centers. Its DS-3 dry-type design with aluminum windings provides reliable operation in indoor environments, while the voltage taps help maintain stable loads. Ensure proper space for heat dissipation and follow safe alignment with existing 550 V to 120/240 V systems.
The T55M11S50NV is UL Listed, indicating compliance with recognized safety standards for electrical equipment. This certification supports regulatory acceptance in many regions and simplifies procurement for regulated facilities. Always verify site-specific compliance requirements, but UL Listing is a strong baseline for safety and install readiness.
Eaton offers a one-year warranty from installation or eighteen months from shipment, per policy 25-000. Maintenance is typically minimal due to the totally enclosed, non-ventilated design. Routine inspection of mounting integrity, enclosure seals, tap connections, and connection integrity for primary and secondary cables is recommended to sustain optimal performance and longevity.