Eaton N29R28B12A K-Factor nonlinear transformer - UL
Part Number: N29R28B12A
Quick Summary
Eaton K-Factor nonlinear ventilated transformer is designed to stabilize power distribution in demanding industrial environments. This three-phase unit supports 112.5 kVA with a 208 V primary and 208Y/120 V secondary, engineered to handle harmonic-rich loads without excessive temperature rise. For engineers, the challenge is maintaining voltage accuracy and safe operation under fluctuating supply and load conditions. The UL-listed safety certification provides a clear compliance path for critical facilities, while the electrostatic shield and ventilated design help minimize EMI and heat buildup. By combining rugged construction with scalable voltage tapping, this transformer delivers reliable performance, lowers cooling costs, and supports ongoing maintenance and spare-part compatibility in modern plants.
Product Information
Extended Description
N29R28B12A Eaton: K-Factor nonlinear ventilated transformer K-13, Three-phase, PV: 208V, Taps: 1 at 0.05 FCAN, 2 at -0.05 FCBN, SV: 208Y/120V, 80°C, 112.5 kVA , Al windings , Elec. Shield, Frame: 918A
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N29R28B12A
UPC
786680014680
Product Length/Depth
30.68 in
Product Height
62.18 in
Product Width
31.44 in
Product Weight
1 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
918A
Tap size
1 at +5% FCAN, 2 at -5% FCBN
Frequency rating
60 Hz
Kva Rating
112.5 kVA
Phase
Three-phase
Primary voltage
208 V
Secondary Voltage
208Y/120 V
Temperature rise
80 °C rise
Special features
Electrostatically Shielded
Weathershield
WS34
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N29R28B12A
Feature → Business Impact → Application: The K-Factor nonlinear (K-13) design mitigates harmonic distortion, improving power quality and allowing higher tolerance for nonlinear loads, which translates to lower overheating risk and more stable equipment performance in manufacturing lines and data centers. This supports faster startup and reduced energy waste during peak demand periods, enabling compliant operation of critical control systems and drives. Application: heavy motors, drives, and CNC systems that generate harmonic currents. Feature → Business Impact → Application: Ventilated design with aluminum windings and an electrostatic shield enhances cooling efficiency and EMI suppression, reducing temperature rise and protecting sensitive control circuitry. This lowers maintenance costs and extends transformer life in rugged factory floors and outdoor installations. Application: high-density electrical rooms and outdoor substations where heat and EMI concerns are paramount. Feature → Business Impact → Application: Tap changer offering 1 at +5% FCAN and 2 at -5% FCBN provides precise voltage regulation under input fluctuations, improving control accuracy and reducing voltage-related downtime. Application: critical machine controls, PLC cabinets, and data processing areas with variable supply. Feature → Business Impact → Application: Three-phase 112.5 kVA rating with 208 V primary and 208Y/120 V secondary delivers compatible, scalable distribution for medium-load facilities, enabling plug-and-play integration with standard plant feeders. Application: multi-line manufacturing cells and automated storage systems. Feature → Business Impact → Application: Frame 918A footprint and WS34 weather shield support straightforward installation and weather-ready operation, simplifying field mounting and reducing site prep time. Application: warehouses, outdoor equipment enclosures, and production floors with mixed indoor/outdoor sites. Feature → Business Impact → Application: UL Listed certification and Eaton warranty provide risk reduction, approved safety, and post-sale support, leading to lower lifecycle costs and faster project sign-offs. Application: procurement for regulated facilities and long-term maintenance planning.
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FAQs
The N29R28B12A is a three-phase transformer designed for 208 V primary and 208Y/120 V secondary, 60 Hz operation. Its footprint (frame 918A) and WS34 weather shield support straightforward mounting in standard electrical rooms or outdoor enclosures. Ensure adequate clearance for ventilation and proper shield grounding for EMI control.
Key specs include 112.5 kVA rating, 208 V primary, 208Y/120 V secondary, 60 Hz frequency, aluminum windings, electrostatic shield, and an 80 °C temperature rise. The transformer is UL Listed and features tap changes of +5% and -5% to regulate voltage under supply variation. Verify site voltage tolerance and space for ventilation.
Yes. The K-Factor nonlinear (K-13) design is optimized for harmonic-rich environments, helping maintain power quality and protecting sensitive IT and control equipment. The ventilated construction, shield, and precise taps support stable operation in data centers, CNC facilities, and process automation lines with demanding loads.
This Eaton transformer is UL Listed, confirming compliance with essential electrical safety standards for industrial equipment. The rugged aluminum windings, electrostatic shield, and weather protection (WS34) contribute to reliability in harsh environments. Always confirm local regulatory requirements and installation standards for your facility.
The 112.5 kVA unit reduces energy waste through efficient operation and improved load handling. The ventilated design lowers cooling costs, while the voltage-tap feature minimizes control downtimes from supply fluctuations. With UL compliance and a one-year warranty (or 18 months from shipment), the TCO is favorable for facilities seeking reliable, long-term power reliability.