Eaton MD550E92 Motor drive isolation transformer - UL Listed
Part Number: MD550E92
Quick Summary
MD550E92 is a motor drive isolation transformer designed for three-phase distribution in industrial control panels. It addresses downtime and equipment damage by providing electrical isolation and robust transient suppression for sensitive motor drives. UL Listed safety certification, DT-3 dry-type design, and WS35 weather shield considerations reinforce reliability in harsh industrial environments. With a 550 kVA rating and aluminum windings, this unit combines strength and efficiency, simplifying installation in new builds or retrofits. The product supports scalable power distribution for motor control centers while offering straightforward maintenance and dependable long-term performance.
Product Information
Extended Description
MD550E92 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: 460Y/266V, 150°C, 550 kVA, Al windings, Frame: 919, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD550E92
UPC
786680331954
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2400 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
919
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
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
550 kVA
Weathershield
WS35
Feature DT-3 dry-type design provides safe, clean isolation between power source and drive networks, reducing fault propagation and enabling compliant installation in dry environments. Business Impact Lowered risk of drive faults and reduced arc-flash exposure, translating to safer maintenance activities and longer equipment life. Application The MD550E92 is well suited for large industrial control panels and machine rooms where reliable three-phase power with clean output is critical for motor drives and automation systems.Feature 550 kVA volt-ampere rating supports high-load applications and future expansion, improving system scalability and capital efficiency. Business Impact Enhanced capacity planning, fewer transformer substitutions, and optimized space usage in switchgear layouts. Application Ideal for motor drive banks and distribution rooms requiring robust power isolation with headroom for peak loads.Feature 460 V primary and 460Y/266 V secondary voltages enable direct integration with common industrial power systems and variable-speed drives. Business Impact Simplified wiring schema and reduced voltage conversion hardware costs. Application Suitable for factory automation lines and robotics cells where precise voltage relationships are essential.Feature Tap changers at +5% FCAN and -5% FCBN offer voltage regulation under fluctuating supply conditions. Business Impact Improved voltage stability for sensitive loads, minimizing drive nuisance tripping. Application Useful in environments with irregular supply quality or long feeder runs.Feature WS35 Weathershield and ventilated cooling support outdoor or harsh indoor installations while maintaining heat dissipation. Business Impact Longer interval maintenance, reduced temperature-related derating, and improved reliability. Application Ideal for outdoor switchgear, unprotected mechanical rooms, and high-ambient applications in metalworking or packaging lines.Feature Aluminum coil material and frame 919 design deliver durable construction and efficient heat transfer. Business Impact Lower ownership costs through durable materials and easier serviceability. Application Fits standard frame sizes in many Eaton and third-party enclosures, aiding retrofits and replacements.
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FAQs
MD550E92 is designed for integration with standard three-phase distribution systems and control panels. Its DT-3 dry-type design and frame 919 dimensions fit common enclosure footprints, while WS35 weather shield enables outdoor or harsh-indoor installations. For best results, verify clearances, cooling airflow, and primary/secondary terminal arrangements per Eaton datasheet and installation guidelines.
Key specs to confirm include a 550 kVA VA rating, 60 Hz frequency, three-phase operation, 460 V primary, 460Y/266 V secondary, aluminum windings, frame 919, and ±5% tap options. Also confirm 150°C rise, ventilated cooling, and WS35 weather shield compatibility to ensure the unit meets your drive and enclosure requirements.
Yes. The 550 kVA dry-type DT-3 design provides effective isolation and transient suppression for large motor drives typical in packaging lines. Its ventilated cooling and aluminum windings support reliable operation under demanding duty cycles, while the UL Listed certification reinforces compliance with safety standards in industrial environments.
MD550E92 carries UL Listed certification, which confirms conformance to recognized safety standards for electrical equipment. This certification supports regulatory compliance in many regions and simplifies acceptance in industrial facilities. Always verify local requirements and ensure the product aligns with your project’s safety and inspection regimes.
The 550 kVA capacity supports future load growth, reducing transformer substitutions and deployment downtime. Aluminum windings and robust enclosure design lower maintenance costs by improving heat management and longevity. A one-year warranty (or 18 months from shipment) adds initial risk protection, while UL Listed certification helps streamline procurement and compliance.