Eaton MD63E99FCU Motor Isolation Transformer - UL Listed
Part Number: MD63E99FCU
Quick Summary
The Eaton MD63E99FCU motor isolation transformer provides clean, isolated power for three‑phase motor drives in industrial facilities. Engineers frequently grapple with electrical noise, control loop disturbance, and drive faults that cut uptime and raise maintenance costs. UL Listed safety certification and dry‑type construction help ensure reliable operation with low heat, while copper windings maximize efficiency. With a 63 kVA rating, 480 V primary and secondary, and a 60 Hz cadence, this unit fits standard industrial power architectures and drives uptime. In practice, facility teams gain simpler installation, predictable performance, and better protection for sensitive motor drives, enabling smoother production workflows and longer equipment life.
Product Information
Extended Description
MD63E99FCU Eaton: Dry Type Distribution Motor Drive Isolation Transformer DT-3 Three-phase 480 DELTA 1 at +5% FCAN 1 at -5% FCBN 480 DELTA 115°C 63 kVA Copper windings 915D 300A WS39 60 Hz 50 hp
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD63E99FCU
UPC
786680111082
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
726 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
915D
Tap size
1 at +5% FCAN, 1 at -5% FCBN
Type
Dry Type Distribution Motor Drive Isolation Transformer
Wiring connection
300A
Frequency rating
60 Hz
Kva Rating
63 kVA
Phase
Three-phase
Primary voltage
480 V
Secondary Voltage
480 V
Temperature rise
115 °C rise
Weathershield
WS39
Dry-type DT-3 transformer design with a 915D frame provides dependable isolation for motor drives, reducing transients and improving control stability in demanding automation environments. This translates to measurable uptime gains and lower maintenance costs as equipment operates within specified temperature rise and loading limits. Copper windings deliver high conductivity and low losses, improving efficiency and reducing thermal stress under full-load conditions. The 63 kVA rating supports robust drive isolation for mid-sized motor systems while maintaining a compact footprint suited for control panels and retrofit projects. The 480 V primary and secondary with 60 Hz operation aligns with common industrial power architectures, simplifying installation and reducing panel redesign requirements. Tap settings at +5% FCAN and -5% FCBN enable precise voltage matching to motor drives, while a 300 A wiring connection supports reliable bus performance. WS39 weather shield provides an added layer of protection for outdoor or harsh environments, extending service life and reducing discretionary maintenance. The unit’s UL Listed certification and rugged copper coil construction contribute to compliance with electrical safety standards and industry expectations for performance and reliability. This transformer also benefits from Eaton’s documented warranty, offering protection against manufacturing defects and ensuring long-term value during ownership.
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FAQs
Installers should verify the 480 V three-phase delta configuration matches the transformer's primary rating and ensure proper enclosure sizing for the DT-3 frame. Consider space for the 39 inch height, 29 inch width, and 22 inch depth; use the WS39 weather shield if the unit is installed in exposed locations. Confirm copper winding connections and 300 A wiring capacity are compatible with local bus bars and protective devices.
Key specs include a 63 kVA rating, three-phase operation at 60 Hz, primary and secondary voltages of 480 V, and a 115 °C rise. Copper windings reduce losses and improve efficiency, while the DT-3 dry-type design supports reliable heat management. The 915D frame and WS39 weather shield enhance mechanical compatibility and environmental protection in industrial installations.
Yes, the MD63E99FCU is UL Listed, indicating it has undergone safety testing and meets recognized electrical safety standards. This supports compliance activities for industrial facilities and helps reduce risk during inspections. When specifying the unit, reference the UL Listed status to reassure stakeholders about safety and reliability in critical motor drive applications.
Yes. The MD63E99FCU uses a dry-type insulation system with a WS39 weather shield option, providing protection against dust, moisture, and contaminants. Its 115 °C rise rating supports operation under higher thermal loads typical of motor drives, while copper windings offer durability and efficient heat dissipation—important factors for harsh manufacturing environments.
The unit’s copper windings and robust dry-type construction minimize corona and insulating losses, contributing to longer transformer life and lower operating temperatures. The 63 kVA rating supports stable performance under peak drive loads, and the UL Listed certification aids ongoing compliance. Routine checks focus on enclosure integrity, insulation condition, and connection torque to sustain reliability over years of operation.