Eaton MD330E95 Motor drive isolation transformer - UL
Part Number: MD330E95
Quick Summary
MD330E95 motor drive isolation transformer delivers clean, isolated power for motor drives and drive systems. This addresses the common challenge of voltage transients and electrical noise that can shorten drive life and cause unplanned downtime in demanding environments. UL Listed certification confirms safety compliance for industrial installations, while the DT-3 dry-type design with WS35 weather shield enhances reliability in harsh plants. The solution leverages aluminum windings and a robust 919E frame to support long-term operation, with taps for voltage compensation and a 150 °C rise rating. Implementing this transformer translates into improved drive uptime, better protection for sensitive electronics, and a clearer path to compliant electrical distribution in your facility.
Product Information
Extended Description
MD330E95 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: 460Y/266V, 150°C, 330 kVA, Al windings, Frame: 919E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD330E95
UPC
786680339066
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2263 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
575 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
330 kVA
Weathershield
WS35
Feature: Three-phase, dry-type distribution with a DT-3 design and a durable 919E frame provides robust isolation. Business Impact: minimizes across-the-line disturbances reaching sensitive VFDs, reducing failures and extending drive life. Application: ideal for motor control centers and automated lines in manufacturing. Feature: Primary 575 V delta and secondary 460Y/266 V support high-performance motor drives with a 330 kVA rating. Business Impact: supports larger loads with stable voltage, improving process consistency. Application: drives for conveyors, pumps, and mixers in process industries. Feature: Voltage taps at +5% and -5% enable on-site voltage compensation. Business Impact: maintains voltage accuracy under supply fluctuations, reducing nuisance tripping. Application: plant-level tuning for variable loads. Feature: Ventilated dry-type construction with WS35 weather shield and aluminum windings. Business Impact: enhances cooling, durability, and weather resistance in challenging environments. Application: outdoor cabinets or dusty, high-temperature plants. Feature: Large footprint with dimensions 36.23 in L x 75 in H x 44.2 in W and 2263 lb weight; Big on reliability, smaller on downtime. Business Impact: easier planning for installation space and mounting, reducing commissioning risk. Application: retrofit or new installations in industrial facilities. Feature: UL Listed certification and standard Eaton warranty. Business Impact: provides procurement confidence and long-term support; Application: maintenance planning and compliance across plant systems.
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FAQs
Plan for a DT-3 dry-type transformer in a 919E frame and ensure proper mounting in a ventilated enclosure. Route primary and secondary conductors to minimize noise coupling, follow the provided clearance specs, and verify the +5% and -5% taps are configured for your site voltage. Use appropriate lugs and protective enclosures to maintain UL compliance during installation.
The unit provides 330 kVA, three-phase operation at 60 Hz, with a 575 V primary (delta) and a 460Y/266 V secondary. It features aluminum windings, a 150 °C temperature rise, WS35 weather shield, and taps at +5% and -5%. The frame is 919E, with a ventilated dry-type design suitable for VFD isolation.
Yes. Its ventilated dry-type construction, WS35 weather shield, and DT-3 design provide reliable drive isolation and resistance to dust, heat, and vibration. With UL Listed safety certification and aluminum windings, it protects sensitive drive electronics while sustaining performance in challenging plants.
This transformer is UL Listed, indicating compliance with established electrical safety standards for industrial equipment. The warranty follows Eaton's policy, providing support for installation and long-term maintenance, aligning with typical procurement and service expectations for industrial power distribution.
The MD330E95 offers improved drive uptime by isolating drives from line transients, reducing drive component wear and nuisance trips. Aluminum windings and robust insulation support long service life, while the UL certification simplifies compliance. A one-year warranty from installation or 18 months from shipment further mitigates initial maintenance costs.