Eaton NT27M24S15EE K-Factor Transformer - NEMA TP-1
Part Number: NT27M24S15EE
Quick Summary
Eaton NT27M24S15EE is a K-Factor transformer for power distribution in industrial facilities. It helps mitigate harmonics and improve efficiency in VFD-heavy automation environments, reducing heating and losses. UL Listed and NEMA TP-1 compliant, it also aligns with TP-1 efficiency metrics. The 15 kVA, 277 V primary and 240 V delta secondary configuration fits compact control panels, while taps at +2.5% and -2.5% provide precise voltage regulation for sensitive equipment. Electrostatically shielded construction and WS11 weather shield bolster reliability in harsh plants. Operating at 50-60 Hz with a 150°C rise, it balances performance with safety margins. Compact dimensions and Eaton datasheets simplify installation in new or retrofit projects, with a one-year or 18-month warranty.
Product Information
Extended Description
NT27M24S15EE Eaton: Eaton K-Factor nonlinear ventilated transformer, KT-13 (1-phase), PV 277V, Taps: 2 at +2.5% /4 at -2.5%, SV 240 delta, 150°C rise, 15 kVA, EE
Product Name
Eaton K-Factor nonlinear ventilated transformer
Catalog Number
NT27M24S15EE
UPC
786680076886
Product Length/Depth
18.39 in
Product Height
31.3 in
Product Width
22.89 in
Product Weight
263 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.
Compliances
NEMA TP-1 Compliant
Certifications
UL Listed
Catalog Notes
NEMA TP-1 efficient
Coil material
Aluminum
Frame
816
Tap size
2 at +2.5% FCAN, 4 at -2.5% FCBN
Frequency rating
50-60 Hz
Volt ampere rating
15 kVA
Phase
Single-phase
Primary voltage
277 V
Secondary Voltage
240 delta
Temperature rise
150 °C rise
Special features
Electrostatically shielded
Weathershield
WS11
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton's Transformer Flex Center
Eaton Specification Sheet - NT27M24S15EE
Feature: K-Factor nonlinear ventilated design minimizes harmonic currents and reduces stray losses. Business Impact: enhances overall efficiency and lowers operating temperatures in panels and switchgear. Application: ideal for VFD-driven equipment in automation cabinets and power distribution enclosures. Feature: 15 kVA single-phase rating with 277 V primary and 240 V delta secondary provides a stable, clean power source for control circuits. Business Impact: reduces voltage instability and nuisance tripping, improving uptime. Application: control panels, motor control centers, and plant power rails. Feature: taps at +2.5% and -2.5% enable precise voltage regulation to accommodate supply fluctuations. Business Impact: protects sensitive instrumentation and drives, lowering risk of undervoltage or overvoltage events. Application: instrumentation panels and PLC-controlled networks. Feature: electrostatic shielding and WS11 weather shield increase resilience against EMI and environmental exposure. Business Impact: improves reliability in noisy industrial settings and outdoor installations. Application: manufacturing floors, outdoor switchgear, and harsh environments. Feature: UL Listed and NEMA TP-1 compliant with 150°C rise and 50-60 Hz design. Business Impact: simplifies procurement, accelerates compliance, and guarantees performance under standard industrial conditions. Application: regulated facilities, new builds, and retrofit projects. Feature: robust frame and dimensions (Frame 816, 18.39 in L, 22.89 in W, 31.3 in H) with 263 lb weight support. Business Impact: easy mounting in standard enclosures and predictable space planning. Application: panel builders and facilities engineers designing distribution cabinets. Warranty: one year from installation or 18 months from shipment provides support during critical early-use period.
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FAQs
NT27M24S15EE features taps at +2.5% and -2.5%. Use the +2.5% taps to compensate for high supply voltage or load-induced drops, and the -2.5% taps to counteract low supply or voltage drop conditions. Proper selection improves voltage regulation for sensitive controls and minimizes nuisance trips in motor drives.
The transformer uses a 277 V primary and an 240 V delta secondary. This configuration supports standard control panels and motor control centers in North American distribution systems while maintaining voltage stability for PLCs, sensors, and drives.
Yes. The unit is UL Listed and NEMA TP-1 compliant, with NEMA TP-1 efficiency considerations. These certifications simplify procurement, ensure safety and performance compliance, and support commissioning in regulated facilities.
Plan for the 15 kVA single-phase footprint: frame 816, dimensions around 18.39 in L by 22.89 in W by 31.3 in H, and a weight of approximately 263 lb. Ensure enclosure space for ventilation, allow for WS11 weather shield if used outdoors, and align mounting with control panels for easy service access.
Expect improved power quality through harmonic mitigation, tighter voltage regulation, and reliable operation in VFD-rich environments. UL/NEMA TP-1 compliance supports easier procurement, while the 150°C rise and 50-60 Hz rating balance performance with durability in typical industrial settings.