Eaton MD330E92 Motor drive isolation transformer - UL Listed
Part Number: MD330E92
Quick Summary
The Eaton MD330E92 motor drive isolation transformer provides clean, isolated power for three-phase drive systems in industrial automation. Engineers often battle voltage transients and startup surges that cause downtime and shorten equipment life. UL Listed certification supports safety compliance across North America, while its DT-3 design and 150°C rise improve reliability. Designed for rugged industrial environments, this transformer aligns with motor drives, dry-type distribution needs, and WS35 weather shielding to endure harsh conditions. It also pairs with modern control strategies to reduce electrical stress on drives and upstream electronics. With a 330 kVA rating and 36.23 in by 75 in by 44.2 in footprint, it fits demanding installations and scalable backup power.
Product Information
Extended Description
MD330E92 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, 330 kVA, Al windings, Frame: 919E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD330E92
UPC
786680331930
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2587 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
919E
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
330 kVA
Weathershield
WS35
Feature: Dry-type DT-3 drive isolation transformer with aluminum windings. Business Impact: Isolates drive circuits from the utility, reducing transients and protecting sensitive controls, enabling longer equipment life. Application: Ideal for motor drive integration in manufacturing lines and packaging equipment. Feature: Ventilated design with WS35 weather shield. Business Impact: Enhanced cooling and environmental resilience, reducing derating in warm or dusty environments. Application: Outdoor switchgear enclosures and harsh plant floors where contaminants are present. Feature: 330 kVA rating with 460 V primary and 460Y/266 V secondary. Business Impact: Supports high-drive-load scenarios with minimal voltage drop, improving performance and reliability. Application: Large machine centers, material handling systems, and packaging lines requiring robust power isolation. Feature: Tap changes at +5% FCAN and -5% FCBN. Business Impact: Voltage regulation to accommodate supply variation and long feeders, reducing startup surges and control instability. Application: Facilities with fluctuating inbound voltage or long-distance power feeds. Feature: Frame 919E, aluminum windings, 36.23 in depth, 44.2 in width, 75 in height. Business Impact: Mechanical compatibility and stable mounting in tight installations, enabling easier retrofits and space planning. Application: OEM panels and retrofit projects in existing control architectures. Feature: UL Listed certification. Business Impact: Demonstrates safety compliance and accelerates procurement for regulated industries. Application: End-user installations and OEM deployments requiring documented electrical safety. Feature: 150°C rise rating. Business Impact: Higher thermal margin supports peak drive loading and reduces derating in hot environments. Application: Continuous operation in factory floors with elevated ambient temperatures. Feature: 1-year warranty or 18 months from shipment. Business Impact: Reduces lifecycle risk and provides assurance for maintenance planning and service support. Application: Plant-wide maintenance programs and EPC projects seeking reliable long-term performance.
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FAQs
Yes. The MD330E92 is designed for a 460 V three-phase primary with a 460Y/266 V secondary, providing drive isolation for compatible 60 Hz systems. It features taps at +5% and -5% to help compensate supply variations and a DT-3 dry-type design suitable for OEM and field installations. Ensure proper mounting in a frame-compatible space (919E) with adequate ventilation and clearances as per installation guidelines.
Key specifications include a 330 kVA rating, 60 Hz operation, three-phase configuration, aluminum windings, and a 150°C temperature rise. These collectively support high-load drive applications while maintaining voltage integrity and limiting thermal derating. The 460 V primary and 460Y/266 V secondary enable direct coupling to typical motor drives, with voltage taps to accommodate site variations.
The MD330E92 is ideal for industrial automation environments with motor drives, including manufacturing lines, packaging equipment, and material handling systems. Its dry-type construction and WS35 weather shield suit harsh plant environments, while the three-phase, 60 Hz configuration matches common industrial power systems. It’s particularly advantageous wherever drive isolation, transient suppression, and robust control electronics protection are priorities.
The MD330E92 carries UL Listed certification, signaling compliance with recognized safety standards for electrical equipment in North America. This certification facilitates procurement for regulated industries and OEMs, reduces validation time, and supports safer integration with drive systems and control panels. Always verify local regulatory requirements in your region for additional certifications if needed.
The dry-type construction with aluminum windings typically requires low maintenance and offers high reliability in continuous drive operation, reducing downtime and maintenance cost. The transformer’s thermal margin (150°C rise) supports sustained loads, while the 36.23 in × 75 in × 44.2 in footprint and WS35 shield simplify installation and shielding needs. Together with UL certification, these factors contribute to favorable ROI through longer service life, fewer substitutions, and predictable performance in demanding environments.