Eaton N39M28T12XCUNV Enclosed Transformer - UL Listed
Part Number: N39M28T12XCUNV
Quick Summary
Eaton N39M28T12XCUNV is a three-phase enclosed transformer designed for reliable power distribution in industrial facilities. In crowded electrical rooms or outdoor spaces with limited ventilation, heat buildup and maintenance complexity frequently threaten uptime. Key specifications include UL Listed certification, K-13 design, and a 150 °C rise, aligning safety with high-performance requirements. Copper windings, an electrostatic shield, and a rugged 918AN frame support durable operation, while taps offer voltage regulation for fluctuating supply conditions. This combination reduces long-term ownership costs and improves reliability, making it a practical choice for power management and distribution across factories, data centers, and process plants.
Product Information
Extended Description
N39M28T12XCUNV Eaton: Eaton Totally enclosed non-ventilated transformer K-Factor Non Linear Transformer, Ventilated, K-13, Three-phase, PV: 400V, Taps: 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 208Y/120V, 150°C, 112.5 kVA, Cu windings, Elec. Shield, Frame: 918AN
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
N39M28T12XCUNV
UPC
786680071287
Product Length/Depth
30.68 in
Product Height
62.18 in
Product Width
31.44 in
Product Weight
1917 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
Coil material
Copper
Design
K-13
Frame
918AN
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
Non-ventilated transformer
Frequency rating
50-60 Hz
Kva Rating
112.5 kVA
Phase
Three-phase
Primary voltage
400 V
Secondary Voltage
208Y/120 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Totally enclosed non-ventilated design protects copper windings from dust and moisture, reducing maintenance cycles and extending service life. This enclosure minimizes cooling requirements and improves reliability in harsh environments, such as dusty plants or outdoor installations. Applications include manufacturing floors, mining sites, and data centers where space is tight and ventilation is limited. Copper windings and the K-13 design enhance efficiency and short-circuit performance, delivering tighter voltage regulation and reduced I2R losses, which translates to lower energy costs and cooler operation in continuous duty applications. Tap changers provide ±2.5% regulation through two +2.5% FCAN taps and four -2.5% FCBN taps, enabling precise compensation for supply variations and reducing transformer stress during peak loads. The 112.5 kVA, three-phase, 50–60 Hz rating supports scalable power delivery with a compact footprint; frame 918AN simplifies mounting in standard electrical rooms, while electrostatic shielding mitigates EMI and enhances downstream equipment protection. Reliability is further reinforced by UL Listed certification and a robust warranty, reducing total cost of ownership and supporting proactive maintenance planning. Designed for compatibility with Eaton’s power distribution ecosystem, this transformer integrates smoothly with existing switchgear, breakers, and control systems, ensuring a cohesive, serviceable solution for mission-critical facilities.
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FAQs
Installation begins with securing the 918AN frame in a suitable enclosure or room with clear access for connections. Connect the 400 V primary to the supply, and the 208Y/120 V secondary to the distribution bus, observing proper phasing. Use the taps for voltage regulation (+2.5% or -2.5% as needed). Verify clearances, grounding, and verify UL Listed compliance during commissioning.
Key specifications include a 112.5 kVA rating, three-phase configuration, 50–60 Hz frequency, primary voltage of 400 V, secondary 208Y/120 V, copper windings, and a 150 °C temperature rise. It is designed with tap changes (2 at +2.5% and 4 at -2.5%) to adjust output voltage and maintain regulation under fluctuating input conditions.
Yes, the unit is a totally enclosed non-ventilated transformer with electrostatic shielding to reduce EMI and protect downstream equipment. UL Listed certification confirms safety compliance. The rugged 918AN frame supports durable mounting in challenging environments, and the enclosure reduces ingress of dust and moisture, lowering maintenance needs in industrial facilities.
The warranty is one year from the date of installation or eighteen months from shipment, whichever occurs first. Eaton provides standard technical support and service options for setup, commissioning, and ongoing maintenance, helping minimize downtime and ensure long-term performance of the N39M28T12XCUNV in critical facilities.
Integration is facilitated by the compatible frame (918AN), copper windings, and standard 400 V to 208Y/120 V output. The unit's taps, enclosure, and UL Listed status align with Eaton switchgear, protection devices, and control systems, enabling streamlined installation, coordinated protection schemes, and scalable power delivery across factory floors, data centers, and process plants.