Eaton MD330E85 Motor drive isolation transformer - UL Listed
Part Number: MD330E85
Quick Summary
Motor drive isolation transformer is a proven solution for protecting sensitive motor drives and control electronics in demanding industrial environments. The Eaton MD330E85 delivers robust isolation, a ventilated dry-type design, and a 330 kVA footprint that fits compact control rooms while handling peak drive loads. UL Listed certification supports compliance and risk reduction, while the DT-3 design with aluminum windings and WS35 weather shield enhances reliability in harsh environments. By stabilizing voltage, reducing transients, and limiting noise propagating from drives, this transformer helps minimize downtime and maintenance costs. With a 208 V primary and 230Y/133 V secondary, plus selectable taps, it aligns with common industrial power architectures and procurement requirements, delivering strong business value in panel and substation applications.
Product Information
Extended Description
MD330E85 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 208V, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 230Y/133V, 150°C, 330 kVA, Al windings, Frame: 919E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD330E85
UPC
786680001352
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
208 V
Secondary Voltage
230Y/133 V
Temperature rise
150 °C rise
Volt ampere rating
330 kVA
Weathershield
WS35
Ventilated dry-type DT-3 design with aluminum windings provides reliable cooling and long-term durability, reducing cooling costs and maintenance frequency in hot, confined panels. Business impact: lower operating temperatures and extended transformer life improve uptime in continuous operation environments; Application: motor drive banks in packaging lines or heavy manufacturing where room ventilation is limited. Voltage flexibility with a 208 V primary and 230Y/133 V secondary, plus taps at +5% FCAN and -5% FCBN, allows on-site voltage adjustments to compensate for supply variances. Business impact: minimizes drive tripping and voltage-related wear; Application: installations facing moderate utility fluctuations in transport and process industries. 330 kVA three-phase rating at 60 Hz supports consolidation of multiple drives on a single device, reducing hardware count and footprint. Business impact: capital expense savings and simpler panel layouts; Application: centralized drive rooms or service entrances. WS35 weather shield and ventilated construction enable use in semi-outdoor or harsh environments, cutting enclosure requirements and enabling plug-and-play integration. Business impact: faster deployment and lower protection costs; Application: outdoor switchgear corridors or outdoor-rated panels. Temperature rise of 150°C ensures insulation margins in high-heat installations, maintaining performance under peak loads. Business impact: greater reliability during start-up surges; Application: high-demand motor starts in plastics and metalworking. UL Listed certification provides regulatory confidence and procurement simplicity, while a one-year warranty supports total cost of ownership considerations. Business impact: reduced risk for system integration and long-term maintenance planning; Application: OEM panel builds and upgrade projects.
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FAQs
Plan for floor mounting to support a 2234 lb unit in a 919E frame footprint. Ensure adequate ventilation for the DT-3 dry-type design and WS35 weather shield, with space for 36.23 in depth, 75 in height, and 44.2 in width. Verify 208 V supply and 230Y/133 V secondary connections, and accommodate the +5% and -5% taps during commissioning.
Three-phase, 60 Hz operation with a 208 V primary and a 230Y/133 V secondary. Rated at 330 kVA, it includes taps at +5% FCAN and -5% FCBN. Coil material is aluminum, framed as 919E, with a 150°C rise temperature and WS35 weather protection for rugged environments.
Yes, the MD330E85 is UL Listed, ensuring electrical safety compliance. Warranty terms are Eaton Selling Policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first, providing protection during early field use.
Ideal for motor drive isolation in three-phase drive systems, power distribution in control panels, and industrial automation environments. Its 330 kVA rating supports multiple drives, while the VT-3 ventilated design suits high-demand start-up periods and environments with heat buildup.
Dimensions: 36.23 in length/depth, 75 in height, 44.2 in width. Weight: 2234 lb. These specs align with the 919E frame and facilitate floor mounting, with additional space for ventilation and cable terminations.