Eaton MD93E70CU Motor drive isolation transformer UL Listed
Part Number: MD93E70CU
Quick Summary
The Eaton MD93E70CU is a motor drive isolation ventilated transformer designed to protect drive systems in industrial automation applications. Users often face voltage transients, control-panel downtime, and maintenance costs when integrating powerful motor drives. UL Listed safety certification anchors compliance, while the DT-3 dry-type design and a 150°C rise support rugged, continuous operation. Leveraging copper windings and voltage taps, this transformer delivers reliable isolation and clean power, reducing electrical noise and extending equipment longevity. In practice, it enables smoother inverter performance, easier serviceability, and a lower total cost of ownership for automated production lines.
Product Information
Extended Description
MD93E70CU Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 480 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 380Y/220, 150°C, 93 kVA, Cu windings, Frame: 916A, uses WS19
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD93E70CU
UPC
786680093388
Product Length/Depth
23.42 in
Product Height
48.56 in
Product Width
28.22 in
Product Weight
835 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
Copper
Design
DT-3
Frame
916A
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
480 V
Secondary Voltage
380Y/220 V
Temperature rise
150 °C rise
Volt ampere rating
93 kVA
Weathershield
WS19
Feature → Business Impact → Application: The DT-3 dry-type design with copper windings delivers robust thermal performance and elevated safety in demanding factory environments, reducing insulation wear and maintenance intervals for motor drive systems used in conveyors and pumps. This translates to measurable uptime and lower lifecycle costs for high-demand manufacturing lines. Feature → Business Impact → Application: Primary 480 V delta, secondary 380Y/220 V with taps at +5% and -5% FCAN/FCBN provides voltage conditioning that minimizes drive dv/dt stress, improving inverter longevity and reducing nuisance tripping in variable load applications such as presses and packaging rows. Feature → Business Impact → Application: Ventilated enclosure and WS19 weathershield options enhance outdoor or semi-enclosed installations, expanding placement flexibility while maintaining safe thermal performance and compliance in harsh environments. Feature → Business Impact → Application: Frame 916A with copper windings and a 93 kVA rating supports scalable power isolation for multiple drives from a single transformer, delivering predictable performance in three-phase lines found in CNC machines and milling centers. Feature → Business Impact → Application: 150°C temperature rise and UL Listed certification deliver predictable protection against overheating and regulatory alignment, enabling faster approvals for panel builds and reduced commissioning risk in industrial control systems.
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FAQs
Install as a ventilated, dry-type DT-3 transformer with copper windings in a suitable enclosure. Ensure adequate clearance for cooling, connect primary to 480 V (delta) and secondary to 380Y/220 V, and use the taps at +5% and -5% as specified. If outdoor use is expected, consider WS19 protection with appropriate enclosure to meet environmental conditions.
Three-phase, 60 Hz, primary 480 V, secondary 380Y/220 V, 93 kVA rating, copper windings, temperature rise 150°C, taps: +5% FCAN and -5% FCBN, frame 916A, WS19 weather shield option.
Yes. It provides galvanic isolation and voltage conditioning for three-phase motor drives, reducing transients and noise that can affect inverter performance and drive reliability in automation lines.
The unit is UL Listed, ensuring compliance with recognized safety standards for electrical equipment in industrial environments, which simplifies approvals and improves on-site safety and reliability.
Warranty is Eaton Selling Policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. Support includes access to Eaton datasheets and official specification sheets for installation and maintenance.