Eaton MD51E95 Motor drive isolation transformer - UL Listed
Part Number: MD51E95
Quick Summary
The MD51E95 motor drive isolation transformer from Eaton delivers clean, isolated power for drive systems in industrial automation. Too often startups face voltage spikes and startup surges that stress motors and trigger unplanned downtime. UL Listed with a DT-3 dry-type design and a 150 °C rise, it’s built for safety and rugged performance in demanding environments. With 575 V primary, 460Y/266 V secondary, and 51 kVA capacity, this unit supports reliable plant-wide power isolation and easy integration into standard distribution schemes. Its aluminum windings, WS39 weather shield compatibility, and 22 x 29 x 39 in form factor help ensure straightforward installation and long service life, delivering real business value. Designed for three-phase industrial drives, it reduces electrical noise and improves drive efficiency.
Product Information
Extended Description
MD51E95 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 575 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266V, 150°C, 51 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD51E95
UPC
786680338489
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
504 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
1 at +5% FCAN, 1 at -5% FCBN
Type
Dry Type Distribution, Drive Isolation Transformer
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
575 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
51 kVA
Weathershield
WS39
Feature: DT-3 dry-type construction provides safe, oil-free isolation with vented cooling, enabling safer maintenance and simpler enclosure design. Business Impact: Reduces fire risk and lowers maintenance complexity while maintaining performance in harsh factory environments. Application: Ideal for control panels and motor drive installations in packaging lines and conveyors. Feature: 51 kVA rating with taps (+5% FCAN, -5% FCBN) on a 575 V primary to 460Y/266 V secondary. Business Impact: Maintains voltage quality under fluctuating supply and startup transients, minimizing motor wear and downtime. Application: Supports consistent drive performance in variable-load industrial cells. Feature: Aluminum windings and ventilated, dry-type DT-3 design. Business Impact: Improves heat dissipation and long-term reliability, reducing cooling requirements and energy use. Application: Suitable for compact switchgear and retrofit projects in harsh environments. Feature: UL Listed certification and WS39 weather shield compatibility. Business Impact: Ensures compliance and protection for outdoor or dusty plant areas, reducing risk of field failure. Application: Environments requiring rugged protection and regulatory conformity. Feature: Frame 914D with dimensions 22 in L x 29 in W x 39 in H and a 504 lb weight. Business Impact: Predictable physical footprint simplifies panel layout and installation planning. Application: Facilitates quicker commissioning and easier service access in large automation suites.
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FAQs
MD51E95 is a three-phase transformer with a 575 V primary and 460Y/266 V secondary, designed to drop into common motor drive panels. Its 22 x 29 x 39 in footprint, 914D frame, and WS39 weather shield compatibility simplify mounting, wiring, and enclosure integration in typical automation configurations.
Key specs include three-phase operation at 60 Hz, 575 V primary, 460Y/266 V secondary, and a 51 kVA rating. It uses aluminum windings, DT-3 dry-type construction, and provides taps at +5% FCAN and -5% FCBN, with a 150 °C rise and UL Listed protection for safe industrial operation.
Yes. The MD51E95 features WS39 weather shield compatibility and a robust dry-type design, making it suitable for indoor panels and outdoor or damp environments when a weather shield is installed, helping protect against dust, moisture, and environmental conditions.
The product follows Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first, providing coverage for manufacturing defects and early-life performance concerns.
By delivering clean, isolated power, the transformer reduces voltage transients and electrical noise, extending motor life and reducing downtime. The dry-type design minimizes oil-related maintenance, while aluminum windings and robust cooling support reliable operation in demanding manufacturing environments, delivering measurable energy efficiency and operational uptime gains.