Eaton MD75E86 Motor drive isolation transformer - UL Listed
Part Number: MD75E86
Quick Summary
Eaton MD75E86 motor drive isolation ventilated transformer is designed to power and protect three-phase drive systems in demanding industrial environments. Engineers frequently battle voltage transients and harmonics that shorten drive life and trigger unexpected downtime. This DT-3 dry-type distribution transformer uses ventilation and a robust aluminum-windings design to manage heat while maintaining clean power delivery. UL Listed certification supports safety and procurement compliance, while the DT-3 construction and WS39 weather shield enable durable installation in variable environments. With a 75 kVA rating, 60 Hz operation, and a primary 208 V delta to secondary 460Y/266 V transformation, it combines a compact footprint with reliable performance for industrial facilities.
Product Information
Extended Description
MD75E86 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 208 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266V, 150°C, 75 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD75E86
UPC
786680001451
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
559 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
208 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
75 kVA
Weathershield
WS39
The MD75E86 delivers high reliability through a 75 kVA three-phase design, enabling stable power delivery to motor drives and power electronics, which reduces downtime and extends equipment life in manufacturing lines. This transformer provides voltage regulation flexibility via taps at +5% FCAN and -5% FCBN, allowing site-specific compensation to minimize drive copper loss and maximize efficiency for variable loads. The DT-3 dry-type construction with ventilated cooling improves heat dissipation and safety in indoor or constrained spaces, supporting simpler installation and lower enclosure requirements. WS39 weathershield compatibility protects the unit in harsh or outdoor environments, reducing corrosion risk and maintenance costs over the asset life. Frame 914D with aluminum windings offers rugged durability and lighter weight than copper equivalents, streamlining handling and installation in panel rooms or switchgear assemblies. The unit’s 60 Hz, three-phase specification is ideal for standard industrial power systems, and its UL Listed status helps with approvals and downstream procurement. Overall, the MD75E86 reduces total cost of ownership by combining robust protection, easy integration with motor drives, and predictable performance in demanding facilities.
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FAQs
The MD75E86 functions as a drive isolation transformer for three-phase motor drives, providing clean, isolated power to VFDs and motor control systems. It guards against transients, supports voltage regulation, and helps protect sensitive drives in industrial processes.
Key specs include 75 kVA rating, 60 Hz operation, primary voltage of 208 V (delta), secondary voltage of 460Y/266 V, aluminum windings, and taps at +5% FCAN and -5% FCBN. It is a dry-type, DT-3 construction with ventilation.
The unit features a 914D frame and WS39 weather shield compatibility for durable outdoor or harsh-environment installation. Dimensions are 22 in (depth) × 29 in (width) × 39 in (height) with a weight of 559 lb, facilitating mounting in switchgear, motor control centers, or proximity to drive cabinets.
Yes, the MD75E86 is UL Listed, indicating safety compliance for electrical equipment. Warranty terms follow Eaton’s policy: 1 year from installation or 18 months from shipment, whichever occurs first.
Typical applications include powering large motor drives, variable frequency drives, and distribution panels in manufacturing, processing plants, and mining facilities. The transformer mitigates transients, supports reliable drive operation, and simplifies power isolation in high-demand environments.