Eaton MD51D72X Motor drive isolation transformer - UL Listed
Part Number: MD51D72X
Quick Summary
Eaton MD51D72X is a motor drive isolation ventilated transformer for three-phase drive systems in industrial automation. This design targets voltage transients and motor drive interference that can disrupt uptime and reduce motor life. UL Listed safety certification demonstrates compliance with established electrical safety standards, supporting reliable installations in harsh industrial environments. The unit features a DT-3 dry-type distribution profile with WS39 weather shield compatibility and a 51 kVA rating, offering scalable power conditioning for factory automation and packaged equipment. By aligning with standard frame 914D and 416 V primary/460Y/266 V secondary configurations, it simplifies procurement, installation, and maintenance for OEMs and service teams alike.
Product Information
Extended Description
MD51D72X Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 416 delta, Taps: 2 at +2.5% FCAN, 2 at -2.5% FCBN, SV: 460Y/266, 150°C, 51 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD51D72X
UPC
786680071201
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
523 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 Listed
Coil material
Aluminum
Design
DT-3
Frame
914D
Tap size
2 at +2.5% FCAN, 2 at -2.5% FCBN
Type
Dry Type Distribution, Drive Isolation Transformer
Frequency rating
50-60 Hz
Phase
Three-phase
Primary voltage
416 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
51 kVA
Weathershield
WS39
DT-3 dry-type construction provides robust insulation and safer maintenance in factory environments, reducing arc flash exposure and simplifying compliance checks. The ventilated design supports reliable cooling in continuous-drive applications, lowering overheating risks and extending inverter life. A 51 kVA rating paired with 416 V primary and 460Y/266 V secondary delivers precise voltage conditioning for VFDs and motor starters across varied load profiles. Two taps at +2.5% and two taps at -2.5% FCAN/FCBN enable on-site voltage fine-tuning to match distribution quirks and line fluctuations, while the 914D frame offers compatibility with standard switchgear footprints. WS39 weather shield compatibility protects windings from dust and moisture, aiding long-term reliability in harsh environments. UL Listed certification simplifies audits and regulatory approvals. Ventilated cooling reduces thermal risk, supporting consistent performance in automation lines. Overall, the MD51D72X delivers safer maintenance, lower maintenance costs, and a clear ROI for factory modernization.
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FAQs
MD51D72X is designed for three-phase drive systems in factory automation. It uses a DT-3 dry-type construction with a ventilated cooling approach and a 51 kVA rating, which makes it ideal for motor drives, VFDs, and drive isolation on production lines. With a 416 V primary and 460Y/266 V secondary, it fits standard industrial power distribution schemes and simplifies integration with existing switchgear.
Key specs include a 51 kVA power rating, 416 V primary voltage, 460Y/266 V secondary voltage, three-phase operation at 50–60 Hz, DT-3 dry-type construction, frame 914D, 150°C rise, and WS39 weather shield compatibility. It also features two +2.5% taps and two -2.5% taps for precise voltage adjustment, supporting flexible deployment across varied loading scenarios.
Yes. MD51D72X is engineered to isolate drive transients and reduce electrical noise in PWM motor drive environments. Its dry-type, ventilated design minimizes thermal stress on power electronics, while the 51 kVA rating provides ample headroom for drive conditioning. The DT-3 configuration and WS39 protection support reliable operation in demanding automation settings, improving uptime and drive performance.
MD51D72X carries UL Listed certification, indicating compliance with recognized electrical safety standards. This certification supports safer installations, smoother supplier audits, and streamlined regulatory approvals in many markets. While regional requirements vary, UL Listed assurance serves as a solid baseline for industrial applications involving motor drives and distribution transformers.
Consider ventilation and space for the WS39-shielded, ventilated transformer, plus standard clearance around the 914D frame for airflow. The +/−2.5% taps enable on-site voltage fine-tuning to maximize efficiency, while the dry-type construction eliminates oil-related risks and maintenance. Proper mounting, wiring practices, and compatibility with 50–60 Hz systems minimize downtime and extend equipment life, delivering a favorable return on investment.