Eaton T20P11S25CUEESSLS40 General purpose ventilated transformer - UL Listed
Part Number: T20P11S25CUNV
Quick Summary
The Eaton general purpose ventilated transformer is a reliable power conversion solution for industrial control panels and distribution systems. Engineers often wrestle with heat buildup, limited airflow, and maintenance challenges in compact equipment, which can degrade performance and shorten component life. This unit addresses those pain points with a ventilated dry-type design, a 150°C rise rating, and a copper-wound construction for durability. UL Listed certification supports safe field installation, while references to NEMA TP-1 efficiency and a stainless steel enclosure option reinforce compliance considerations. With 240 x 480 V primary and 120/240 V secondary, plus multiple taps and a 25 kVA rating, it enables scalable, cost-effective power distribution in modern factories, machine shops, and process lines.
Product Information
Extended Description
T20P11S25CUNV Eaton: Eaton Totally enclosed non-ventilated transformer 25 KVA NON-VENT'D 1PH 240X480-120/240 115C RISE, COPPER
Product Name
Eaton Totally enclosed non-ventilated transformer
Catalog Number
T20P11S25CUNV
UPC
786680136498
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
444 lb
Certifications
Contact Manufacturer
Type
Non-ventilated transformer
The T20P11S25CUEESSLS40 is a 25 kVA, single‑phase dry-type distribution ventilated transformer with a 240 x 480 V primary and 120/240 V secondary. This feature delivers ample headroom for mid-size loads while maintaining safe operating temperatures in confined switchgear and control panels, reducing the need for multiple smaller units and lowering installation complexity. The copper windings improve electrical efficiency and thermal performance, translating to better uptime and lower energy losses in continuous operations. With 60 Hz operation and a 150 °C rise, the transformer tolerates industrial environments and rapid load changes common in manufacturing lines. The taps—1 at +5%, 2 at −5%, 2 at +2.5%, and 4 at −2.5%—provide voltage regulation under load and input fluctuations, enabling tighter secondary voltages for sensitive loads and better control tolerance in automation systems. The WS11S weather shield option and Grade 304 stainless steel enclosure note offer corrosion resistance in damp or harsh environments, while the low sound design (≈40 dB) reduces noise impact in nearby work areas. The catalog notes’ NEMA TP-1 efficiency reference supports energy-conscious design, and UL Listed certification confirms safety compliance for field installations. The unit’s dimensions—20.36 in length, 37.59 in height, 22.89 in width—and a 528 lb weight provide a clear footprint and weight profile for planning and retrofits. With a single, robust enclosure, it suits control panels, MCCs, and machine rooms seeking reliable, scalable power distribution with predictable maintenance needs and a strong total cost of ownership.
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FAQs
When planning installation, ensure adequate clearance for cooling air in ventilated design, verify mounting to a sturdy frame compatible with its 528 lb weight, and accommodate the 20.36 in by 37.59 in by 22.89 in footprint. Use proper WS11S or enclosure options if the environment demands corrosion resistance; confirm UL Listed compliance for your facility.
Key specs include a 25 kVA rating, primary 240 x 480 V, secondary 120/240 V, frequency 60 Hz, and voltage taps: 1 at +5%, 2 at −5% x 2 at +2.5%, 4 at −2.5%. Copper windings and a 150 °C rise support reliable operation under load with practical voltage regulation in real-world panels.
Yes, the unit carries UL Listed certification, validating electrical safety for field installation and compliance in many commercial and industrial environments. While there are references to NEMA TP-1 efficiency and corrosion-resistant enclosure notes, always verify local regulations and assembly requirements for your specific project or location.
The product is covered under Eaton’s warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This provides a solid baseline for maintenance planning, with access to manufacturer support for field issues, parts, and service guidance.
Confirm the panel’s input is compatible with a 240 x 480 V primary supply and that the downstream loads are designed for 120/240 V. Use the transformer's taps to compensate for voltage drift, and consider the 25 kVA rating to prevent overloads. Factor in copper windings and high-temperature rise for thermal management and long-term reliability.