Eaton MD20E92ZZ Open core-coil ventilated transformer - UL Recognized
Part Number: MD20E92ZZ
Quick Summary
MD20E92ZZ Open core-coil ventilated transformer provides isolated drive power for three-phase distribution networks in industrial facilities. Engineers often struggle with overheating, space constraints, and voltage variability when integrating transformers into retrofits or new builds. UL Recognized certification backs safety and reliability, and the open-type DT-3 core design supports efficient cooling in harsh environments. Compact, dry-type construction with aluminum windings reduces maintenance while delivering stable secondary voltage for motor drives and control panels. The unit’s 20 kVA rating and ±5% voltage taps provide practical voltage adjustment without additional gear, streamlining installation. Designed for 60 Hz operation with a 150°C rise, it balances performance and protection for demanding industrial applications.
Product Information
Extended Description
MD20E92ZZ Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266V, 150°C, 20 kVA, Al windings, Frame: 910S
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
MD20E92ZZ
UPC
786685197395
Product Length/Depth
14.12 in
Product Height
30 in
Product Width
20.12 in
Product Weight
224 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 Recognized
Catalog Notes
Open type core and coil assembly
Coil material
Aluminum
Design
DT-3
Frame
910S
Tap size
1 at +5% FCAN, 1 at -5% FCBN
Type
Dry Type Distribution, Drive Isolation Transformer
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
460 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
20 kVA
Feature: Open core-coil ventilated design improves cooling under heavy load for dry-type transformers. Business Impact: cooler operation reduces thermal derating and extends transformer life, lowering maintenance costs in continuous-operation environments. Application: ideal for dry-type distribution in motor drives and switchgear rooms where ambient heat is a concern. Feature: Primary 460 V and secondary 460Y/266 V with taps at +5% and -5% provides voltage flexibility. Business Impact: enables quick compensation for supply variations, reducing the need for external regulators and improving voltage stability. Application: benefits motor drives, drives in conveyors, and control panels with variable loads. Feature: 20 kVA rating with aluminum windings and a 910S frame. Business Impact: robust performance with lighter weight for easier installation and corrosion resistance, supporting compact MCCs. Application: retrofit and new-build distribution cabinets in manufacturing and processing facilities. Feature: Dry-Type Distribution, Drive Isolation Transformer design. Business Impact: isolates drive loads from the main system, reducing EMI and dv/dt impacts, improving motor performance and protection. Application: automation lines, robotics cells, and packaging equipment. Feature: 60 Hz compatibility and 150°C rise rating. Business Impact: reliable operation across typical North American plant environments with clear thermal margins. Application: continuous-duty applications in industrial plants with moderate ambient temperatures. Feature: UL Recognized certification and open-type core and coil construction. Business Impact: strengthens safety compliance and accelerates approval in regulated facilities. Application: OEMs and end-users seeking certified, maintainable dry-type transformers in control rooms.
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FAQs
Plan for open-core access and adequate ventilation since the DT-3 ventilated design relies on natural cooling. Ensure clearance around the 910S frame, provide stable mounting, and allow room for accessibility to taps and terminations. Use proper seismic and mechanical support per local codes to maintain safe operation in industrial environments.
The transformer offers taps at +5% FCAN and -5% FCBN, enabling on-site voltage compensation to maintain a stable secondary voltage under load. This reduces the need for external regulators and helps protect sensitive drives and control circuits from voltage fluctuations.
Yes. As a drive isolation transformer, it decouples drive loads from the main bus, minimizing electrical noise and EMI. This improves motor performance, extends drive life, and enhances overall control stability in MCCs and automated lines.
The MD20E92ZZ carries UL Recognized certification, reflecting compliance with recognized safety standards for electrical equipment. It is designed as a dry-type distribution transformer with an open-core assembly, suitable for industrial environments requiring certified power isolation.
Expect reliable operation backed by a one-year warranty (or 18 months from shipment) and UL safety certification. The aluminum windings and open-core design reduce maintenance needs, while the taps and robust cooling help maintain efficiency and minimize downtime in continuous-use applications, supporting a favorable total cost of ownership.