Eaton MD330E88 Motor drive isolation transformer - UL Listed
Part Number: MD330E88
Quick Summary
Eaton MD330E88 motor drive isolation transformer delivers robust voltage isolation for three‑phase drive systems in industrial environments. This design helps protect sensitive drive electronics from voltage spikes, startup surges, and transient disturbances that can cause equipment downtime. The UL Listed certification underscores safety compliance, while the DT-3 dry-type construction and WS35 weather shield enhance reliability in challenging environments. Built to integrate with 230 V primary and 230Y/133 V secondary configurations, it supports scalable motor drive installations and straightforward retrofits in control rooms and machine cells, delivering improved uptime and reduced maintenance costs.
Product Information
Extended Description
MD330E88 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: 230Y/133V, 150°C, 330 kVA, Al windings, Frame: 919, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD330E88
UPC
786680330339
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2336 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
919
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
230Y/133 V
Temperature rise
150 °C rise
Volt ampere rating
330 kVA
Weathershield
WS35
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - MD330E88
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Three-phase, 60 Hz, 330 kVA drive isolation transformer with a DT-3 dry-type design. Business Impact: Provides robust protection for motor drives and power electronics, reducing startup surges and electrical noise, which translates to longer equipment life and fewer unplanned outages. Application: Ideal for industrial drive lines, VFD interfaces, and machine control centers. Feature: Primary voltage 230 V, secondary 230Y/133 V with taps at +5% and -5%. Business Impact: Voltage matching and minor tap adjustments mitigate under/over-voltage stress, enabling stable performance across fluctuating supply conditions. Application: Packaging, packaging lines, and material handling systems with variable supply rails. Feature: Ventilated, WS35 weather shield, aluminum windings, Frame 919. Business Impact: Enhanced cooling and weather protection support reliable operation in substations, basements, or outdoor installations, reducing maintenance and extending service life. Application: Outdoor equipment rooms and harsh production environments. Feature: 60 Hz, three-phase configuration with 150°C rise and 330 kVA rating. Business Impact: Suited for demanding drive applications, delivering consistent power to large motor drives while maintaining thermal margins. Application: Heavy-duty conveyors, mixers, and process lines. Feature: UL Listed certification and dry-type construction. Business Impact: Simplifies compliance and procurement, enabling faster approvals and safer integration with control architectures. Application: All industrial facilities seeking certified, safe isolation for drive systems. Feature: Mechanical footprint and weight (36.23 in L × 44.2 in W × 75 in H, 2336 lb). Business Impact: Clear installation planning, enabling proper space allocation and mounting in existing electrical rooms or enclosures. Application: Retrofit projects and new OEM installations with space planning constraints.
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FAQs
When deploying the MD330E88, ensure a ventilated, stable enclosure and adequate clearance for the 36.23 in L × 44.2 in W × 75 in H footprint. The unit is three-phase, 60 Hz, with a 230 V primary and 230Y/133 V secondary, and weighs 2336 lb. Verify mounting supports consistent with Frame 919 and WS35 protection where outdoor or harsh environments are present. Review Eaton's specification sheet for exact installation guidelines.
Key specs include a 330 kVA rating, 60 Hz operation, three-phase configuration, primary 230 V, secondary 230Y/133 V, and taps at +5% FCAN and -5% FCBN. Diameter and frame details are Frame 919, with aluminum windings. The unit is a ventilated, dry-type distribution transformer designed for drive isolation in motor control applications.
Yes, the MD330E88 uses a WS35 weather shield and a ventilated dry-type design to improve reliability in exposed or harsh environments. Aluminum windings and robust cooling support steady operation, while the weather shield provides added protection against environmental factors common in outdoor installations and non-climate-controlled spaces.
The MD330E88 is UL Listed, confirming compliance with widely recognized electrical safety standards. No CE, SIL, or IP rating data is provided in the available specification. When compliance requirements include CE or other certifications, verify with Eaton’s datasheet or contact Eaton support to confirm current certification coverage for your region and application.
Warranty terms state one year from installation or eighteen months from shipment, whichever occurs first. Regular maintenance should focus on ensuring ventilation remains unobstructed, seals and WS35 shield integrity are intact, and that connections to the primary and secondary windings are secure. For service policies, consult Eaton Selling Policy 25-000 and the manufacturer’s datasheets for recommended maintenance intervals.