Eaton N29M28T75A K-Factor Transformer - UL Listed
Part Number: N29M28T75A
Quick Summary
The Eaton N29M28T75A K-Factor transformer provides reliable three-phase power conditioning for industrial controls and distribution. Engineers face heat buildup, downtime, and voltage instability in ventilated designs, so this unit emphasizes cooling with a 150 °C rise and aluminum windings to sustain performance under load. UL Listed certification supports safety and compliance in mission-critical environments, while the WS39 weathershield and electrostatic shielding offer protection in demanding installations. The 75 kVA rating, dual primary taps, and 208 V input with 208Y/120 V output deliver installation flexibility, reduce energy waste, and simplify OEM integration for modern power management and distribution systems.
Product Information
Extended Description
N29M28T75A Eaton: K-Factor Non Linear Transformer, Ventilated, K-13, Three-phase, PV: 208V, Taps: 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 208Y/120V, 150°C, 75 kVA , Al windings , Elec. Shield, Frame: 915D, uses WS39
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N29M28T75A
UPC
786680014529
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
600 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
Model A
Coil material
Aluminum
Type
Ventilated transformer
Design
K-13
Frame
915D
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
75 kVA
Phase
Three-phase
Primary voltage
208 V
Secondary Voltage
208Y/120 V
Temperature rise
150 °C rise
Special features
Electrostatically Shielded
Weathershield
WS39
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N29M28T75A
Feature → Business Impact → Application: The N29M28T75A uses a K-Factor nonlinear design to minimize harmonic stress on downstream equipment, increasing system reliability and reducing maintenance costs in motor drives and controls. In practice, plant operators see improved power quality and longer equipment life in process automation while keeping energy usage predictable in high-load environments. Feature → Ventilated construction and a 150 °C rise rating enhance cooling under peak loads, enabling compact enclosures and safer operation in harsh manufacturing floors. This translates to higher available output and less derating for critical applications like CNC machines or packaging lines. Feature → Tap changer with 2 × +2.5% and 4 × -2.5% offers voltage regulation under fluctuating loads, supporting stable PLCs and drives without oversized rectifiers. Feature → 208 V primary and 208Y/120 V secondary provide straightforward integration with standard plant power, improving compatibility with existing switchgear and motor starters. Feature → Electrostatic shield, frame 915D, and WS39 weathershield deliver EMI protection and weather resilience, reducing interference in control cabinets and outdoor installations. Feature → Aluminum windings and robust construction lower thermal losses and provide durable, long-life operation in demanding environments, while UL Listed certification reinforces safety and compliance with industry codes. Feature → One-year warranty (or eighteen months from shipment) offers predictable, service-friendly coverage that aligns with OEM procurement cycles and maintenance budgeting.
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FAQs
For installation, ensure adequate ventilation around the ventilated transformer and secure mounting on a rigid base compatible with the 915D frame. Verify clearance for 600 lb weight and access to primary 208 V supply and secondary 208Y/120 V outputs. Use WS39 weather protection as needed and confirm UL Listed compliance in your panel or MCC environment. Plan for the dual tap options to optimize voltage under load.
The transformer provides taps at 2 at +2.5% FCAN and 4 at -2.5% FCBN, allowing fine-tuned voltage regulation under varying load conditions. This helps maintain stable control voltage for PLCs, drives, and automation sensors, reducing risk of undervoltage or overvoltage conditions that could trigger faults or reduced performance.
Yes. It features an electrostatic shield to mitigate EMI, aluminum windings for efficient heat dissipation, and WS39 weather shielding for protection in outdoor or damp environments. The UL Listed certification further certifies safety in industrial settings and supports integration with existing safety programs.
Key specs include 75 kVA three-phase rating, 60 Hz, primary 208 V, secondary 208Y/120 V, frame 915D, aluminum windings, and a 150 °C rise. Tap options (+2.5% / -2.5%), electrostatic shield, WS39 weathershield, and UL Listed certification are essential for compatibility with plant power distribution, protective relays, and safety compliance.
The product ships with a warranty of one year from installation or eighteen months from shipment, whichever comes first. For maintenance, monitor insulation resistance and cooling performance, inspect windings and shields for signs of wear, and document tap adjustments during voltage regulation checks to preserve performance over the life of the transformer.