Eaton MD63E90 Motor drive isolation transformer - UL
Part Number: MD63E90
Quick Summary
MD63E90 Motor drive isolation transformer delivers isolated power for drive systems in industrial machinery. Operators frequently confront voltage spikes, startup transients, and harmonic distortion that threaten drive longevity and uptime. UL Listed certification confirms electrical safety and compliance in harsh industrial environments. The dry-type DT-3 design with WS39 weather shield and aluminum windings supports reliable operation under demanding conditions. Designed for a 230 V primary and 575Y/332 V secondary, this transformer enables robust motor-control and safer control cabinets, helping reduce maintenance costs and improve overall plant reliability. This solution integrates smoothly with standard control systems and MCCs, shortening commissioning time.
Product Information
Extended Description
MD63E90 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 230 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 575Y/332V, 150°C, 63 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD63E90
UPC
786680330971
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
535 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
230 V
Secondary Voltage
575Y/332 V
Temperature rise
150 °C rise
Volt ampere rating
63 kVA
Weathershield
WS39
DT-3 dry-type ventilated construction delivers efficient heat dissipation in compact motor-drive cabinets, reducing enclosure cooling requirements and enabling safer operation in high-temperature environments. The ventilated design helps sustain continuous-duty performance in demanding applications such as conveyors, pumps, and presses, where reliable power is critical. Aluminum windings combine light weight with robust electrical characteristics, improving thermal stability during start‑up transients and reducing cooling load on the plant’s HVAC system. Voltage taps provide ±5% adjustments from the nominal rating, helping maintain consistent voltage to drives during supply fluctuations and startup surges. This capability minimizes nuisance tripping, stabilizes drive speed, and reduces wear on input filters and capacitor banks. In practice, the MD63E90 supports smooth operation across a wide load range without field rewiring or downtime, delivering tangible reliability gains for automation lines. The 63 kVA three-phase transformer features a 230 V primary delta and a 575Y/332 V secondary, enabling scalable motor-control architectures for multiple drive loads. Operating at 60 Hz ensures predictable torque and speed characteristics in standard plant power. The 150°C insulation rise margin provides robust protection against thermal stress in hot environments, extending service life and reducing risk of insulation failure. Frame 914D with aluminum windings and WS39 weather shield equips the unit for rugged indoor or outdoor service, resisting corrosion and weather-related degradation. The dry-type design minimizes oil management and environmental risk, while the ventilated construction supports easy heat removal in cramped spaces. These features translate to lower maintenance costs and simpler upgrades within modern control rooms and MCCs. With a compact footprint and standard mounting footprint, the MD63E90 installs quickly in existing motor-control centers and switchgear. UL Listed certification provides safety compliance across many industrial markets, while a documented warranty supports service planning. The combination of reliability, safety, and installation efficiency helps plant operators reduce downtime and achieve a lower total cost of ownership for drive modernization projects.
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FAQs
The MD63E90 is designed for straightforward integration within standard motor control centers and distribution panels. Its 22 in length, 29 in width, and 39 in height fit typical footprint allocations, and its 914D frame provides compatible mounting. Ensure adequate clearance for ventilation and access to taps at +5% and -5% for field adjustments. Confirm 60 Hz supply compatibility and three-phase connections per the datasheet.
MD63E90 uses a 230 V primary delta connection and a 575Y/332 V secondary configuration. This arrangement supports motor-drive loads with a 60 Hz supply and provides a robust isolation solution to protect downstream drives and control circuits from voltage transients and harmonics, improving motor performance and control stability.
Yes. The transformer features aluminum windings in a DT-3 dry-type construction with WS39 weather shield, enabling reliable operation in hot, humid, or semi-exposed environments. Its 150°C rise rating provides a healthy insulation margin, while UL Listed certification ensures electrical safety compliance across industrial settings, reducing risk during routine maintenance and upgrades.
The unit’s dry-type design eliminates oil management concerns and simplifies maintenance, while the ventilated cooling supports heat removal in compact control rooms. With a 63 kVA rating and compatible frame/winding construction, it integrates with standard motor-drive architectures, enabling scalable systems and quicker commissioning for multiple drive loads without extensive rewiring.
Eaton provides a warranty of one year from installation or eighteen months from shipment, whichever occurs first. This coverage, combined with UL Listed certification and documented installation guides, supports planning for maintenance and service actions, helping minimize downtime and optimize total cost of ownership throughout the motor-drive lifecycle.