Eaton MD770E93 Motor drive isolation ventilated transformer - UL Listed
Part Number: MD770E93
Quick Summary
Eaton MD770E93 motor drive isolation ventilated transformer delivers clean, stabilized power for three-phase motor drives in demanding industrial environments. Manufacturers often struggle with installation complexity, EMI, and heat management when upgrading or expanding drive systems, risking outages and accelerated component wear. UL Listed safety compliance, the DT-3 dry-type design, and WS35 weather protection support reliable operation in harsh production environments. Together with a 770 kVA rating and 460 V primary, this transformer helps minimize downtime while delivering scalable power for plant-wide motor control and automation. This combination also aligns with standard distributor catalogs, offering straightforward integration with existing Eaton motor drives and dry-type distribution strategies.
Product Information
Extended Description
MD770E93 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, 770 kVA, Al windings, Frame: 920, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD770E93
UPC
786680337550
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2900 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
920
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
770 kVA
Weathershield
WS35
Ventilated dry-type DT-3 design with aluminum windings and WS35 weather shield reduces heat buildup and enclosure corrosion, improving reliability while lowering cooling requirements in confined spaces. Business impact: lower energy and cooling costs, longer component life, and reduced maintenance cycles. Application: motor drive isolation transformers in manufacturing lines and packaging plants where space and airflow are constrained. The 770 kVA, three-phase configuration at 460 V primary delivers substantial headroom for drive buses and startup surges, enabling scalable automation without overdesign. Business impact: improved uptime and faster project ROI during scale-up. Application: heavy industrial drive systems and pump stations requiring robust, clean power conditioning. Voltage support includes 575Y/332 V secondary to favor multiple drive voltages; taps provide ±5% regulation for voltage stability under fluctuating loads. Business impact: enhanced drive performance and reduced nuisance tripping. Application: motor control centers and distribution panels that demand precise voltage control. UL Listed safety certification ensures compliance with recognized safety standards. Business impact: accelerated approvals and risk mitigation for regulated deployments. Application: plant environments with stringent procurement requirements. Frame 920 and WS35 protection enable straightforward installation in standard industrial enclosures. Business impact: compatible footprint and protective housing reduce installation time. Application: retrofit projects and new builds requiring rugged, ready-to-deploy power isolation. Warranty coverage (one year from installation or eighteen months from shipment) provides budgeting certainty and support for long-term maintenance planning. Application: service contracts and OEM integration that depend on predictable after-sales support.
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FAQs
Plan for a three-phase layout at 460 V with adequate ventilation to exploit the DT-3 dry-type design and WS35 housing. Ensure enclosure clearance for the 920 frame and provide appropriate cable routing to minimize EMI. Verify taps for +5% and -5% voltage adjustment are accessible and that the installation adheres to UL Listed safety requirements.
Key specs include a 770 kVA rating, 60 Hz operation, three-phase configuration, and a 460 V primary with a 575Y/332 V secondary. The unit offers ±5% tap adjustments to manage voltage regulation under changing loads, and the aluminum windings support efficient, durable operation with reduced copper loss. These factors collectively improve drive efficiency and reliability.
Yes. The DT-3 dry-type design with WS35 weather shield provides protection in challenging environments, and a 150°C rise rating indicates strong thermal performance under heavy load. Aluminum windings further enhance corrosion resistance, making the transformer well-suited for industrial floors, packaging lines, and process plants.
The MD770E93 is UL Listed, signaling adherence to recognized safety standards for electrical devices. This certification supports safer integration into regulated facilities and can streamline supplier approvals and audits. For project teams, UL listing reduces the burden of safety validation during design reviews and commissioning.
ROI improves through reduced downtime, lower cooling loads, and fewer EMI-related issues thanks to the ventilated dry-type design and effective isolation. Maintenance is typically minimal and focused on routine inspections, insulation integrity, and connection torque checks. The unit includes a one-year warranty from installation or eighteen months from shipment, aiding budgeting and service planning.