Eaton N48M31B75CU K-Factor Nonlinear Ventilated Transformer - UL Listed
Part Number: N48M31B75CU
Quick Summary
Eaton N48M31B75CU is a K-Factor nonlinear ventilated transformer for robust power conditioning in industrial panels. This design targets harmonic-rich environments, helping to stabilize voltage and extend equipment life amid nonlinear loads. UL Listed certification provides safety assurance for demanding facilities, while the three-phase 60 Hz configuration supports standard distribution architectures. With a 480 V primary, a 220Y/127 V secondary, and copper windings, the unit delivers reliable voltage transformation and improved efficiency. The WS19 weather shield variant adds outdoor compatibility, making it a versatile choice for warehouses, data centers, and manufacturing floors. For procurement and maintenance teams, this transformer combines safety, performance, and long-term value in a compact, frame-916A package.
Product Information
Extended Description
N48M31B75CU Eaton: Eaton K-Factor Non Linear Transformer, Ventilated, K-13, Three-phase, PV: 480V, Taps: 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 220Y/127V, 80°C, 45 kVA, Cu windings, Elec. Shield, Frame: 916A, uses WS19
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
N48M31B75CU
UPC
786680061325
Product Length/Depth
23.42 in
Product Height
48.56 in
Product Width
28.22 in
Product Weight
907 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
Coil material
Copper
Type
Ventilated transformer
Design
K-13
Frame
916A
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
45 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
220Y/127 V
Temperature rise
80 °C rise
Special features
Electrostatically Shielded
Weathershield
WS19
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - N48M31B75CU
K-Factor nonlinear (K-13) design manages harmonics from drives and nonlinear loads. Business Impact: reduces harmonic distortion, lowers heating, and stabilizes bus voltage, extending equipment life and decreasing maintenance costs. Application: ideal for electrical rooms and panels supporting variable-speed drives in manufacturing and processing facilities. Ventilated construction and an 80 °C rise rating. Business Impact: improves cooling under peak load, enabling higher continuous kVA operation without derating. Application: data centers, machine rooms, and outdoor substations where airflow or ambient temperature challenge insulation systems. Copper windings and electrostatic shield. Business Impact: enhances conductivity, reduces I2R losses, and minimizes EMI/EMC interactions with adjacent equipment. Application: motor drives and control panels near sensitive instrumentation requiring shielded operation. Tap changer with two taps at +2.5% and four taps at -2.5%. Business Impact: tight voltage regulation across load swings, preserving secondary voltage and protecting downstream devices. Application: installation in panels facing fluctuating supply or long feeders. Frame 916A, WS19 Weathershield compatibility, UL Listed protection. Business Impact: provides rugged mounting opportunities, weather resistance, and certified safety for industrial environments. Application: outdoor or dusty plant areas, compliant with safety programs and maintenance schedules, delivering predictable performance and reduced downtime.
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FAQs
Installation should follow the manufacturer's guidelines for a three‑phase transformer, ensuring proper clearance for ventilation, secure mounting on a structural channel or panel enclosure, and correct wiring to the 480 V primary and 220Y/127 V secondary. Use the WS19 weather shield when outdoor exposure or harsh environments are present, and verify that the taps are set to the appropriate +2.5% or -2.5% positions for voltage stability.
Key specs include a 45 kVA rating, three-phase operation at 60 Hz, 480 V primary, 220Y/127 V secondary, copper windings, 80 °C rise, frame 916A, and K‑13 design. The unit is UL Listed and features copper windings with electrostatic shielding for EMI reduction.
Yes. Its K-Factor nonlinear design mitigates harmonics from nonlinear loads such as drives, CNCs, and power electronics, improving power quality and reliability in data centers and manufacturing environments where clean power is essential.
The transformer is UL Listed, signifying compliance with recognized safety standards for electrical equipment. This certification reduces procurement risk, simplifies regulatory alignment, and supports safety programs in industrial facilities.
With copper windings and an electrostatic shield, the unit offers high efficiency and EMI control, which lowers operating losses and mitigates interference. The 80 °C rise rating supports durable performance under heavy loads, and the included warranty provides assurance against early failures, contributing to lower total cost of ownership.