Eaton NT20P11F37CU Transformer - UL Listed K-Factor
Part Number: NT20P11F37CU
Quick Summary
NT20P11F37CU, Eaton K-Factor nonlinear ventilated transformer, delivers reliable power conditioning for industrial facilities. Engineers face voltage stability challenges, harmonic distortion, and thermal limits during peak loads. UL Listed certification underscores safety compliance for electrical installations. Equipped with copper windings, electrostatic shield, and WS11 weather shield, the unit minimizes heat rise and protects critical loads in demanding environments. With a 37.5 kVA rating and a 240/480 V primary feeding 120/240 V secondary, it supports scalable, code-compliant deployments while reducing service interruptions and total cost of ownership. The design also supports voltage tapping for precise regulation, enabling straightforward upgrades in aging facilities and new builds alike.
Product Information
Extended Description
NT20P11F37CU Eaton: K-Factor Transformer, Ventilated, K-13, Single-phase, PV: 240 X 480V, Taps: 1 at +5% FCAN, 2 at -5% FCBN X 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 120/240V, 115°C, 37.5 kVA , Cu windings , Elec. Shield, Frame: 818, uses WS11
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT20P11F37CU
UPC
786680024924
Product Length/Depth
20.36 in
Product Height
37.59 in
Product Width
22.89 in
Product Weight
400 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
818
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
60 Hz
Kva Rating
37.5 kVA
Phase
Single-phase
Primary voltage
240 V, 480 V
Secondary Voltage
120/240 V
Temperature rise
115 °C rise
Special features
Electrostatically shielded
Weathershield
WS11
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT20P11F37CU
Feature: K-Factor nonlinear ventilated design. Benefit: minimizes harmonic distortion and improves fault tolerance, providing more stable power delivery for sensitive equipment. Application: data centers, manufacturing lines, and large electrical rooms. Feature: Tap changes on the primary. Benefit: on-site voltage regulation with +5% FCAN, -5% FCBN (two), +2.5% FCAN (two), and -2.5% FCBN. Application: facilities with fluctuating supply or tight voltage tolerances in process lines. Feature: Copper windings with electrostatic shield. Benefit: lower resistance losses, improved thermal performance, and enhanced insulation safety for continuous operation. Application: metal fabrication, HVAC drives, and critical infrastructure. Feature: Frame 818 and WS11 weathershield. Benefit: robust mounting compatibility and environmental protection for indoor or semi-outdoor installations. Application: electrical rooms, protected outdoor enclosures, and retrofit sites. Feature: 60 Hz, single-phase 37.5 kVA rating with 240/480 V primary and 120/240 V secondary. Benefit: reliable, scalable power conditioning for medium-load distributions while meeting standard utility frequencies. Application: commercial buildings, data centers, and manufacturing facilities. This combination of design features supports efficiency gains, safety compliance, and a lower total cost of ownership by simplifying installation, maintenance, and future upgrades in industrial power systems.
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FAQs
Install NT20P11F37CU in a dedicated electrical space or enclosure with adequate clearance for ventilation. Use the frame 818 mounting points, ensure WS11 weather shield compatibility for environmental protection, and connect the primary 240/480 V and secondary 120/240 V windings according to the taps (+5%, -5%, +2.5%, -2.5%). Maintain 60 Hz operation and observe weight considerations (~400 lb) during handling and mounting to prevent injury or stress on mounting hardware.
Key specs include a 37.5 kVA rating, single-phase configuration, 60 Hz frequency, primary voltages of 240 V and 480 V, secondary voltages of 120/240 V, copper windings, and a 115 °C rise. The transformer uses an electrostatic shield and comes in frame 818 with WS11 weathershield, and it features multiple primary taps for voltage regulation.
Yes. The NT20P11F37CU’s K-Factor nonlinear design helps mitigate harmonic distortion and maintain voltage stability, which is essential for sensitive IT equipment and critical manufacturing processes. UL Listed safety certification and copper windings with shielding provide additional protection, making it a robust choice for data centers, server rooms, and mission-critical facilities.
The transformer is UL Listed, ensuring compliance with electrical safety standards. It is covered under Eaton's warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first, providing protection for workmanship and performance in the field.
Maximize ROI by leveraging on-site tap adjustments to maintain voltage during supply fluctuations, reducing stress on downstream equipment. Use copper windings and the electrostatic shield to minimize losses and overheating. Routine checks should verify tap positions, insulation integrity, and WS11 weather shield sealing to extend service life and minimize unplanned outages.