Eaton NT48M12S15CUNVTR Transformer - 150°C Rise
Part Number: NT48M12S15CUNVTR
Quick Summary
The Eaton NT48M12S15CUNVTR transformer supplies 480 V to 120 V control circuits in industrial power systems. In crowded panels, heat buildup and voltage drift can threaten uptime and equipment life. Typical certifications for this class include CE and UL listings, with potential NEMA/CSA options—verify current approvals with Eaton. The unit’s 150°C rise and copper-windings design deliver reliable voltage regulation, even under harmonic loads, helping ensure motor starters and PLCs operate within spec. This combination supports tighter panel layouts and lower maintenance while delivering robust power quality for automation, machine tools, and process equipment.
Product Information
Extended Description
NT48M12S15CUNVTR Eaton: Eaton K-Factor nonlinear ventilated transformer, KT-13 (1-phase), PV 480V, Taps: 2 at +2.5% /4 at -2.5%, SV 120V, 150°C rise, 15 kVA, Copper windings, NV, TR
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT48M12S15CUNVTR
UPC
786680111907
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
392 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
Contact Manufacturer
Catalog Notes
Certified test report of standard production tests for the specific serial number to be shipped Totally enclosed non-ventilated DS-3 or DT-3.
Coil material
Copper
Wiring connection
54F
Type
Totally enclosed non-ventilated transformer
Frame
817N
Tap size
2 at +2.5% FCAN 4 at -2.5% FCBN
Frequency rating
60 Hz
Volt ampere rating
15 kVA
Phase
Single-phase
Primary voltage
480 V
Secondary Voltage
120 V
Temperature rise
150 °C rise
Special features
Electrostatically shielded
Weathershield
Indoor-Outdoor
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT48M12S15CUNVTR
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 15 kVA single-phase transformer with 480 V primary and 120 V secondary, copper windings. Benefit: Delivers dependable, clean power to control circuits with high efficiency, reducing copper losses and extending equipment life. Application: Automation panels, machine tools, and process controls where stable voltage is critical. Feature: Tap settings 2 at +2.5% and 4 at -2.5%. Benefit: Fine-tuned voltage regulation to compensate supply fluctuations, minimizing nuisance tripping and equipment wear. Application: Motor starters and PLC feeders in variable-power environments. Feature: K-Factor nonlinear ventilated transformer. Benefit: Enhanced harmonic tolerance and better power quality under non-linear loads, improving uptime and reducing EMI. Application: Facilities with mixed loads, drives, and controllers. Feature: Temperature rise rated at 150°C. Benefit: Maintains performance under high-load or constrained cooling, reducing derating and waste heat. Application: Dense control panels and hot facilities where ambient temperatures spike. Feature: Indoor-Outdoor Weathershield with electrostatic shielding. Benefit: Flexible installation options with EMI reduction and weather resistance, lowering enclosure requirements. Application: Outdoor-rated or semi-enclosed installations in demanding environments. Feature: Totally enclosed non-ventilated design with copper windings and a 817N frame. Benefit: Low maintenance, robust protection, and easier mounting in standard electrical rooms. Application: Industrial control panels requiring compact, reliable transformers.
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FAQs
When integrating the NT48M12S15CUNVTR into a control panel, ensure adequate front clearance and thermal management for the 392+ lb unit. Use the 817N frame mounting provisions, comply with enclosure ratings suitable for indoor-outdoor use, and connect via the 54F wiring method. Plan for the +2.5% / -2.5% tap options to maintain stable 120 V secondary output under load variations.
This is a 15 kVA, single-phase transformer with a 480 V primary and 120 V secondary, designed for 60 Hz operation. It features two taps at +2.5% and four taps at -2.5% to compensate supply fluctuations. Winding material is copper, and the unit employs a 150°C rise rating to sustain performance under high loads, supporting reliable control panel operation.
Yes. The transformer is designed for Indoor-Outdoor deployment with weather-shielding suitable for variable environments. It also uses a K-Factor nonlinear design to better tolerate harmonic currents, reducing voltage distortion and EMI. This makes it a strong fit for facilities with variable loads, drives, and automation equipment while maintaining power quality.
The NT48M12S15CUNVTR provides five total taps: two at +2.5% and four at -2.5%. In practice, you configure taps to counteract supply voltage drift so the 120 V secondary remains within tolerance under varying input conditions. Adjustments should be performed with the system de-energized and confirmed under load to prevent voltage transients.
The transformer is covered by Eaton’s Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. Maintenance is straightforward due to the Totally Enclosed Non-Ventilated design and copper windings, which minimize breathing and aging. Regular inspections should focus on tap connections, enclosure seals, and EMI shielding integrity.