Eaton MD63E86 Motor Drive Isolation Transformer - UL Listed
Part Number: MD63E86
Quick Summary
The Eaton MD63E86 Motor Drive Isolation Transformer provides clean, isolated power for motor drives in industrial automation. Engineers often battle voltage spikes, harmonics, and startup surges that shorten drive life and trigger downtime. UL Listed safety certification, DT-3 dry-type construction, and a 150°C rise rating support safe, reliable operation in demanding environments. The 63 kVA rating with 208 V primary and 460Y/266 V secondary delivers robust performance, while WS39 compatibility and a 914D frame simplify integration into control cabinets and switchgear, delivering measurable business value through improved uptime and drive protection.
Product Information
Extended Description
MD63E86 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, 63 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD63E86
UPC
786680001444
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
485 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
63 kVA
Weathershield
WS39
Feature → Business Impact → Application: Dry-type, ventilated construction eliminates oil containment and reduces maintenance, improving safety in compact electrical rooms and panel enclosures. This supports longer service intervals for motor drive systems and lowers lifecycle costs in automated manufacturing. Feature → Application: Three-phase design at 60 Hz with a 63 kVA rating provides strong power for medium-size drive trains, enabling reliable motor control in CNCs, conveyors, and robotics cells. Benefit: Increased uptime and stable performance across loads; Application: Suitable for new installs or upgrades in existing automation lines. Feature → Application: Tap changes at +5% FCAN and -5% FCBN enable voltage regulation to mitigate under- or over-voltage conditions during startup and peak loads, reducing nuisance tripping and extending drive life. Benefit: Improved commissioning flexibility and reduced total cost of ownership. Feature → Application: Frame 914D with aluminum windings and WS39 weather shield compatibility supports rugged installation in harsh environments, including exposed switchgear or outdoor-rated spaces. Benefit: Easier mounting, better heat dissipation, and extended transformer life. Feature → Application: Dry-type DT-3 design meets safe, oil-free operation for indoor control panels and limited-space installations. Benefit: Lower risk of leaks, simplified compliance, and faster maintenance cycles. Feature → Application: UL Listed certification confirms adherence to safety standards, supporting procurement governance and regulatory compliance. Benefit: Streamlined approvals and reduced vendor risk for industrial plants and OEMs.
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FAQs
For MD63E86 installations, ensure a ventilated, oil-free space since it is a dry-type transformer designed for panel mounting. Use the 914D frame with adequate clearance for airflow and access to connections. Verify 208 V delta primary and 460Y/266 V secondary wiring, and accommodate the WS39 weather shield if installed in exposed environments. Proper enclosure grounding and adherence to UL Listed requirements are essential for compliant operation.
The MD63E86 provides taps at +5% FCAN and -5% FCBN to adjust the secondary voltage within a controlled range. This improves voltage regulation during startup transients and under varying load conditions, reducing undervoltage or overvoltage scenarios that can trigger drive faults. Use the taps during commissioning to optimize drive performance for your specific supply characteristics.
Yes, the MD63E86 is compatible with Eaton WS39 weather shield. The shield protects the vented, dry-type transformer from environmental contaminants while maintaining airflow for cooling. This compatibility enables reliable outdoor or semi-outdoor installations, extends service life, and simplifies maintenance in industrial plants with variable ambient conditions.
Key specs include a 63 kVA rating, three-phase 60 Hz operation, 208 V primary, and 460Y/266 V secondary, with a 150°C rise and aluminum windings. These attributes deliver solid efficiency and robust startup reliability for motor drives, enabling stable voltage transfer, reduced copper losses, and enhanced heat dissipation in continuous duty applications such as conveyors and machine tools.
The MD63E86 carries UL Listed certification, confirming compliance with electrical safety standards. Warranty is governed by Eaton’s policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This combination supports risk mitigation, predictable maintenance budgeting, and assurance for industrial customers and OEMs.