Eaton MD51E93 Motor drive isolation transformer - UL Listed
Part Number: MD51E93
Quick Summary
The Eaton MD51E93 motor drive isolation transformer provides clean, isolated power for industrial drive systems. Engineers often battle voltage transients, harmonics, and nuisance noise that shorten drive life and cause downtime. This model carries UL Listed certification and uses a DT-3 dry-type design with WS39 ventilated protection to meet safety and reliability standards. By delivering reliable isolation and precise voltage transformation, it supports efficient panel design and smoother commissioning, while remaining compatible with 60 Hz three-phase systems and standard motor drives.
Product Information
Extended Description
MD51E93 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 575Y/332V, 150°C, 51 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD51E93
UPC
786680332159
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
505 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
460 V
Secondary Voltage
575Y/332 V
Temperature rise
150 °C rise
Volt ampere rating
51 kVA
Weathershield
WS39
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - MD51E93
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: Dry Type Distribution, Drive Isolation Transformer design minimizes oil-related risks and eases compliance, improving safety and maintenance predictability for retrofit projects. Benefit: reduces leakage and fire hazard while simplifying installation in enclosed spaces for OEMs and service teams. Application: distribution panels in manufacturing lines and packaging environments where clean power is critical. Feature → Business Impact → Application: DT-3 class design with ventilated WS39 enclosure enhances cooling and ambient resilience, boosting reliability in dense panel layouts and high transient conditions. Benefit: extends component life and lowers maintenance cycles. Application: new builds and retrofits in automotive and process industries. Feature → Business Impact → Application: 51 kVA ratings with 60 Hz three-phase operation and 460 V primary supporting robust motor drives. Benefit: enables compact, centralized power conditioning with predictable surge handling. Application: drive systems for conveyors, mixers, and pumping stations. Feature → Business Impact → Application: Aluminum coil windings and 914D frame with 22 in depth, 39 in height, and 29 in width deliver a practical footprint for retrofit projects. Benefit: easier procurement and installation alignment with existing cabinet dimensions. Application: upgrades in space-constrained control rooms and switchgear housings. Feature → Business Impact → Application: Tap changes at +5% FCAN and -5% FCBN provide voltage adaptability to load swings and supply variations. Benefit: reduces voltage mismatch risk and improves drive performance. Application: plant-wide installations with variable loads and irregular supply quality. Feature → Business Impact → Application: Weathershield WS39 compatibility supports outdoor or semi-indoor installations without oil cooling. Benefit: lowers environmental protection concerns and long-term maintenance costs. Application: outdoor substations and sheltered outdoor control panels.
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FAQs
MD51E93 is designed for seamless integration with standard three-phase motor drives operating at 460 V input and 60 Hz. Its DT-3 dry-type construction and WS39 enclosure simplify mounting in common control cabinets, while the 914D frame dimensions help align with existing rack spaces and bus connections. Ensure proper ventilation and clearance for optimal cooling.
Key specs include a 51 kVA rating, three-phase operation at 60 Hz, primary voltage of 460 V, secondary voltage of 575Y/332 V, and taps at +5% FCAN and -5% FCBN. It uses aluminum windings and supports a 150 °C rise, balancing performance with compact physical footprint in industrial panels.
Yes. The DT-3 dry-type design with WS39 weather shield allows installation in moderately harsh environments, reducing moisture and dust ingress risks. The ventilated enclosure improves cooling, which helps maintain performance under peak loads typical in conveyors, pumps, and mixed-use drive systems.
The MD51E93 carries UL Listed certification, signaling compliance with recognized safety standards for electrical products. This supports safer installation practices in commercial and industrial facilities and aligns with typical safety audits and procurement requirements.
Maintenance benefits include reduced oil handling risk due to the dry-type construction and improved reliability from the ventilated WS39 enclosure and aluminum windings. ROI stems from longer drive life, fewer unplanned outages, and simplified installation in space-constrained panels, especially in automated production lines.