Eaton T20P11S2516ZZ Open Core-Coil Transformer - NEMA TP-1
Part Number: T20P11S2516ZZ
Quick Summary
T20P11S2516ZZ is an open core-coil ventilated transformer engineered for single-phase power distribution in industrial automation. In busy plant environments, cooling bottlenecks and voltage variation can drive downtime and equipment wear. UL Recognized and NEMA TP-1 compliant, along with a UL-listed design, provide regulatory confidence for panel builders and integrators. The unit’s 25 kVA rating, 60 Hz operation, and voltage-tap options support reliable control power while minimizing energy waste. Coupled with its CS25E103 frame and aluminum windings, the transformer integrates smoothly into existing panels and maintenance routines, delivering long-term performance with predictable install and service outcomes.
Product Information
Extended Description
T20P11S2516ZZ Eaton: Eaton Open core-coil ventilated transformer, DS-3 (1-phase), PV 240 x 480V, Taps: 1 at +5%/2 at -5% x 2 at +2.5%/4 at -2.5%, SV 120/240V, 150°C rise, 25 kVA, 16, ZZ
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
T20P11S2516ZZ
UPC
786680210914
Product Length/Depth
1.1 in
Product Height
1.1 in
Product Width
1.1 in
Product Weight
356 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 Recognized
Catalog Notes
NEMA TP-1 efficient, Open type core and coil assembly
Coil material
Aluminum
Frame
CS25E103
Tap size
1 at +5% FCAN, 2 at -5% FCBN x 2 at +2.5% FCAN, 4 at -2.5% FCBN
Type
Dry Type Distribution Transformer
Frequency rating
60 Hz
Phase
Single-phase
Primary voltage
240 x 480 V
Secondary Voltage
120/240 V
Temperature rise
150 °C rise
Volt ampere rating
25 kVA
Eaton's low-voltage dry-type distribution transformers
Eaton's low-voltage dry-type distribution transformers
Eaton Specification Sheet - T20P11S2516ZZ
Open core-coil ventilated construction improves airflow around windings, delivering lower hotspot temperatures and a robust 150 °C rise rating. This translates to longer service life and reduced cooling requirements in panels and switchgear, especially when fed by fluctuating mains. Typical applications include machine control centers and distribution panels in manufacturing plants. The 25 kVA, 60 Hz, single-phase design provides ample, stable power for control circuits, enabling reliable operation of drives, relays, and PLCs. Primary 240 x 480 V and secondary 120/240 V offer flexible schematics for panel builders and integrators, reducing wiring complexity and inventory variety. Voltage taps—one at +5%, two at -5%, two at +2.5%, and four at -2.5%—allow precise voltage regulation to mitigate under- or over-voltage conditions on sensitive electronics. Aluminum coil construction reduces weight and cost while maintaining corrosion resistance in harsh environments, and CS25E103 frame compatibility ensures straightforward mounting in standard enclosures. Compliance with NEMA TP-1 and UL Recognized listings supports regulatory adherence and simplifies procurement for regulated facilities.
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FAQs
Install the transformer within a CS25E103 frame enclosure, secure with appropriate mounting hardware, and connect the primary to a 240/480 V supply and the secondary to 120/240 V distribution. Follow standard electrical practices, ensure proper clearance for ventilation, and use appropriate overcurrent protection. The taps allow voltage adjustment (+5%, -5%, +2.5%, -2.5%) to compensate for line variance. Verify UL and NEMA TP-1 compliance in your installation documentation.
The T20P11S2516ZZ is a single-phase dry-type transformer rated at 25 kVA, operating at 60 Hz. Primary voltage is 240 x 480 V, secondary 120/240 V, with a 150 °C rise rating. It features taps for voltage adjustment and uses aluminum windings in a ventilated open-core design to optimize cooling and efficiency, reducing thermal strain on connected control equipment.
Yes. It is UL Recognized and NEMA TP-1 compliant, designed for dry-type distribution in industrial panels. The open-core ventilated design enhances cooling, supporting higher ambient temperatures and continuous operation in machine control centers. Its CS25E103 frame compatibility simplifies integration, while voltage taps help maintain stable control voltages in fluctuating electrical environments.
The T20P11S2516ZZ carries UL Recognized certification and NEMA TP-1 compliance, indicating suitability for regulated industrial applications and energy-efficient operation. Catalog notes also reference NEMA TP-1 efficiency, supporting compliance with standards for dry-type distribution transformers. These certifications help with project approvals, warranty validity, and interoperability within standardized control panels.
The transformer is designed for long life with a robust 150 °C rise, aluminum windings for durability, and vented cooling that reduces cooling requirements. A one-year warranty (or 18 months from shipment) provides initial protection, while UL/NEMA TP-1 compliance minimizes regulatory risk. Savings stem from efficient operation, reduced heat-related downtime, and easier integration into standardized panels, lowering maintenance and replacement costs over the equipment's life.