Eaton MD34E94 Motor drive isolation ventilated transformer - UL Listed
Part Number: MD34E94
Quick Summary
Eaton MD34E94 motor drive isolation ventilated transformer provides clean, protected power for industrial drive systems. In today’s demanding plants, voltage transients and inadequate isolation can hasten motor wear, trigger trips, and increase downtime. UL Listed safety certification, combined with the DT-3 dry-type design and WS38 weather shield, supports reliable operation in harsh environments. The 34 kVA rating with a 575 V primary and 230Y/133 V secondary delivers scalable power for motor drives, while the aluminum windings and tap options add flexibility. This transformation enables safer, compliant installations and reduces lifecycle costs by improving efficiency and protecting sensitive drive electronics, aligning with broader automation and maintenance strategies.
Product Information
Extended Description
MD34E94 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 575 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 230Y/133V, 150°C, 34 kVA, Al windings, Frame: 912B, uses WS38
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD34E94
UPC
786680338304
Product Length/Depth
16.5 in
Product Height
30 in
Product Width
23 in
Product Weight
360 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
912B
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
575 V
Secondary Voltage
230Y/133 V
Temperature rise
150 °C rise
Volt ampere rating
34 kVA
Weathershield
WS38
34 kVA capacity with a 575 V primary and 230Y/133 V secondary delivers reliable power for three-phase drive systems. This sizing reduces bus voltage stress, minimizes voltage drop along long runs, and supports scalable automation in conveyors and packaging lines. DT-3 dry-type, ventilated construction with a 912B frame keeps operating temperatures predictable in moderate-to-harsh environments. The design supports a 150 °C rise, enabling compact installations while meeting safety margins and reducing cooling requirements in the control panel. Primary taps at +5% and -5% offer voltage compensation for supply swings, maintaining voltage balance for sensitive drive electronics. This capability reduces nuisance tripping and improves drive responsiveness in facilities with fluctuating mains. Aluminum windings paired with WS38 Weathershield and UL Listed certification provide enhanced durability and compliance, aiding regulatory documentation for audits. With a 30 in height, 23 in width, and 16.5 in depth, the unit fits standard equipment spaces and reduces installation complexity. The 360 lb weight necessitates proper handling gear, but enables robust, oil-free operation and easier maintenance planning. Warranty alignment and access to Eaton catalogs support engineers during commissioning and ongoing service maintenance.
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FAQs
MD34E94 should be mounted in a ventilated, level position to ensure proper air flow for heat dissipation. The unit’s footprint is 16.5 in depth, 23 in width, and 30 in height with a 360 lb weight, so allow space for connections and WS38 enclosure if used. Use rugged mounting hardware and connect the 575 V three-phase input and 230Y/133 V secondary outputs per the supplied wiring diagram.
Key specs include a 34 kVA rating, 575 V primary, 230Y/133 V secondary, 60 Hz, and three-phase configuration. Primary taps at +5% and -5% enable voltage compensation for mains fluctuations, preserving drive voltage integrity. Aluminum windings and a 150 °C rise support reliable operation in typical plant environments, while the DT-3 dry-type construction provides rugged isolation for motor drives.
Yes. MD34E94 suits motor drives in conveyors, packaging lines, and robotics, offering isolation and stable power for sensitive drive electronics. The ventilated dry-type design reduces oil-related hazards and supports safe installation in open control rooms or equipment spaces. Ensure compatibility with three-phase drives and match switchgear, while planning adequate mounting space and cooling paths.
MD34E94 carries UL Listed safety certification, confirming compliance with recognized electrical safety standards. This supports regulatory requirements for control panels and electrical rooms. Always reference the UL listing in your compliance package and maintain proper installation clearances and ventilation to preserve listed performance.
Warranty coverage follows Eaton Selling Policy 25-000, providing one year from installation or eighteen months from shipment, whichever occurs first. For ROI, consider reduced downtime, extended drive life, and protection of critical equipment. Field support and access to manufacturer datasheets and catalogs aid commissioning and ongoing maintenance throughout the transformer’s service life.