Eaton T20P11S15N12 Transformer - NEMA 12 Enclosure

Part Number: T20P11S15N12
Manufacturer
Eaton
Part number
T20P11S15N12

Quick Summary

Eaton Totally enclosed non-ventilated transformer delivers rugged, maintenance-free power for industrial control panels and heavy equipment. In harsh factory environments, overheating, dust ingress, and crowded wiring can undermine reliability; this unit’s sealed NEMA 12 enclosure protects windings and reduces service calls. With a 15 kVA single-phase rating, 240×480 V primary and 120/240 V secondary, plus a 150°C insulation rise and DOE 2016 exempt status, it aligns with demanding specification standards. For OEMs and maintenance teams, this transformer enables safer panel assemblies, easier installation, and lower total cost of ownership while supporting scalable power distribution in manufacturing.

Product Information

Extended Description

T20P11S15N12 Eaton: EATON TOTALLY ENCLOSED NON-VENTILATED TRANSFORMER, DOE 2016 EXCEMPT, ALUMINIUM, 60HZ, 15KVA, SINGLE PHASE, 240X480V, 120/240V, NEMA ST-20, 150°C RISE, NEMA 12, 843ANV, 220°C, 1@+5%, 2@-5% X 2@+2.5%, 4@-2.5%
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
T20P11S15N12
UPC
786689922641
Product Length/Depth
30.06 in
Product Height
49.63 in
Product Width
29.5 in
Product Weight
474 lb
Certifications
Contact Manufacturer
Coil material
Aluminum
Enclosure
NEMA 12
Frame
843ANV
Insulation
220°C
Tap size
1@+5%, 2@-5% X 2@+2.5%, 4@-2.5%
Efficiency
Exempt
Frequency rating
60 Hz
Kva Rating
15 kVA
Phase
Single-phase
Secondary Voltage
120/240 V
Sound Level
NEMA ST-20
Temperature rise
150 °C rise
Special features
TOTALLY ENCLOSED NON-VENTED NEMA 12 ENCLOSURE
Feature → Business Impact → Application: The Totally Enclosed Non-Ventilated design provides robust protection against dust, moisture, and incidental exposure, reducing maintenance needs and enabling reliable operation in indoor industrial spaces such as machine shops and assembly lines. This translates to fewer unscheduled downtime events and longer service intervals for critical control panels. Application-wise, it suits compact control cabinets where space is at a premium and where reliability is essential for continuous production. Feature → Business Impact → Application: NEMA 12 enclosure delivers durable ingress protection in dusty environments, helping control systems stay inside spec even in facility floors with environmental variability. This supports compliance with indoor installation standards while enabling faster commissioning and simplified enclosure routing for wiring looms. Feature → Business Impact → Application: Aluminum coil construction offers corrosion resistance and favorable thermal performance, improving longevity in corrosive or humid environments without overburdening weight. This is advantageous for elevated ambient temperatures in manufacturing cells and outdoor-indoor transitions integrated into plant power distribution. Feature → Business Impact → Application: Tap size options (1@+5%, 2@-5%, 2@+2.5%, 4@-2.5%) provide precise voltage regulation for sensitive loads like PLCs and drives, reducing equipment stress and improving control accuracy. This enables straightforward field adjustments during commissioning and in response to supply fluctuations on the production line. Feature → Business Impact → Application: 15 kVA single-phase rating with 240×480 V primary and 120/240 V secondary supports medium-power distribution to multiple machines or zones, enabling modular panel designs and scalable channeling of power in manufacturing cells. Feature → Business Impact → Application: 60 Hz operation with a 150°C rise and 220°C insulation rating contributes to stable performance in warm indoor environments, reducing thermal derating risks and ensuring consistent output during peak loads in machine tools and process lines. Feature → Business Impact → Application: DOE 2016 exempt status simplifies procurement and documentation for projects seeking energy-conscious equipment without requiring additional efficiency labeling; this can streamline project approvals and budgeting for retrofit programs. Feature → Business Impact → Application: Dove-tailing with existing Eaton products and standard mounting footprints supports quick installation, reduced wiring complexity, and faster integration into control cabinets, machine panels, and industrial dashboards, improving overall project timelines. Bottom line, this transformer delivers reliable power with practical installation benefits, helping facilities meet uptime targets and control costs over the equipment lifecycle.

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FAQs

The T20P11S15N12 is designed for indoor applications with a NEMA 12 enclosure, aligning with standard control panels. It integrates with common mounting footprints and Eaton-compatible wiring schemes, enabling straightforward installation in facilities that already use NEMA 12 cabinets. Field technicians should verify terminal torque, clearance for taps, and proper venting or breathing considerations to maintain enclosure integrity.
This transformer provides voltage taps at 1@+5%, 2@-5%, 2@+2.5%, and 4@-2.5% to fine-tune the secondary output. In practice, these taps allow operators to compensate for voltage drop along long runs or light-load variations, improving PLC and control circuit performance and reducing sensor drift or drive misbehavior in sensitive equipment.
Yes. The unit uses a NEMA 12 enclosure designed to minimize dust ingress in indoor factory settings, helping protect windings and insulation. This makes it well-suited for manufacturing lines, assembly areas, and machine cabinets where dust, grime, or minor splashes are common, contributing to longer transformer life and lower maintenance needs.
Certifications are listed as DOE 2016 exempt, with additional documentation available upon request from the manufacturer. The enclosure and performance specs (NEMA 12, 60 Hz, 15 kVA, aluminum coil, 150°C rise) reflect compliance-conscious design for typical industrial environments. For UL/CE or specific certification inquiries, contact Eaton’s technical support to confirm current validity and obtain certificates.
The totally enclosed non-ventilated design minimizes dust ingress and reduces routine maintenance compared with open-breathing models, lowering service intervals. Plan for periodic electrical checks, verify tapping accuracy during commissioning, and ensure proper enclosure sealing during installation. The robust NEMA 12 enclosure and aluminum windings contribute to extended service life in indoor environments, helping stabilize long-term operating costs.