Eaton MD330E90 Motor Drive Isolation Transformer UL Listed
Part Number: MD330E90
Quick Summary
Eaton MD330E90 Motor Drive Isolation Transformer provides dry-type drive isolation for motor drives in industrial automation. This design helps reduce electrical noise, voltage spikes, and downtime by separating the control electronics from harsh mains conditions. Key certifications include UL Listed, and the unit’s robust dry-type DT-3 construction supports safe, compliant installation in industrial panels. Beyond safety, the transformer enables predictable voltage transformation and improves drive longevity, supporting uptime and energy efficiency. Suitable for control panels, motor drives, and distribution systems in manufacturing and process industries. Its 330 kVA rating, 60 Hz operation, and 230 V primary with 575Y/332 V secondary support scalable, energized networks.
Product Information
Extended Description
MD330E90 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, 330 kVA, Al windings, Frame: 919E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD330E90
UPC
786680331138
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2234 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
230 V
Secondary Voltage
575Y/332 V
Temperature rise
150 °C rise
Volt ampere rating
330 kVA
Weathershield
WS35
Feature: Dry-type DT-3 distribution with aluminum windings and vented construction delivers reliable performance in humid or contaminant-prone environments. Business Impact: Reduces maintenance costs and equipment downtime by avoiding oil leaks and simplifies compliance with indoor installation standards. Application: Ideal for panel installations in manufacturing lines where clean, dry environments are standard. Feature: 230 V primary delta and 575Y/332 V secondary enable seamless integration with common motor drives and 60 Hz power rails. Business Impact: Supports robust voltage transformation with minimal harmonic distortion, improving drive efficiency and lifecycle. Application: Suitable for three-phase motor control centers and VFD-fed loads. Feature: Tap changes at +5% FCAN and -5% FCBN provide on-site voltage regulation. Business Impact: Maintains consistent output under feed variations, reducing nuisance tripping and protecting downstream equipment. Application: Long cable runs or variable utility conditions in process plants. Feature: WS35 Weathershield and ventilated design optimize heat dissipation for continuous operation. Business Impact: Enhances reliability in warm environments and reduces thermal stress on windings. Application: Outdoor or semi-enclosed switchgear rooms with moderate ventilation. Feature: Heavy-duty frame 919E with 330 kVA rating and aluminum windings supports high-load drive isolation. Business Impact: Delivers predictable performance under peak demand, improving overall plant uptime. Application: Heavy industrial applications requiring durable drive isolation transformers. Feature: UL Listed certification confirms safety compliance and supports procurement approvals. Business Impact: Speeds purchasing cycles and reduces vendor risk in safety-critical installations. Application: Industrial automation projects with strict safety attestations and standards.
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FAQs
MD330E90 is designed for a 230 V primary delta connection with a 60 Hz three-phase system and a 575Y/332 V secondary. It is not specified for 480 V primary operation. If your plant uses 480 V, you would need a step-down or a transformer rated for that voltage in the input stage. Check system requirements and consult Eaton for alternatives.
Key specs include a 330 kVA VA rating, three-phase 60 Hz operation, primary 230 V, secondary 575Y/332 V, and taps at +5% FCAN and -5% FCBN. Aluminum windings and a DT-3 dry-type construction with vented cooling support safe, efficient operation in panel enclosures. These features translate to reliable drive isolation, voltage stability, and improved drive longevity in demanding environments.
Yes, the MD330E90 uses a ventilated dry-type distribution design with WS35 weather shield, suitable for controlled indoor areas or semi-enclosed spaces. While not a conventional outdoor unit, the WS35 shield provides additional protection in warmer environments, helping maintain cooling performance and protecting windings from ambient heat buildup during continuous drive operation.
The product is UL Listed, indicating alignment with recognized safety standards for electrical equipment. This certification supports compliance documentation, procurement approvals, and reduces vendor risk in safety-critical installations. No other certifications are listed in the provided data, so verify project requirements and consult Eaton if additional standards (for example CE/IEC) are needed.
The MD330E90 follows Eaton’s warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This provides protection against manufacturing defects and support for commissioning. For preventative maintenance and performance guarantees, coordinate with Eaton's engineering services and establish an on-site inspection cadence as part of the procurement.