Eaton MD330E86 Motor Drive Isolation Transformer - UL Listed
Part Number: MD330E86
Quick Summary
MD330E86 motor drive isolation transformer delivers reliable power for industrial drives. Operators often face voltage sags and EMI that disrupt sensitive drives; this transformer provides robust drive isolation and ventilation to minimize downtime. It is UL Listed and designed as a DT-3 dry-type distribution transformer with a 150 °C rise, supporting safe, compliant operation. With compatible 208 V input and 460Y/266 V output, plus WS35 weather shield, it simplifies procurement and installation while delivering long-term cost savings for plant automation.
Product Information
Extended Description
MD330E86 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 208V, 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
MD330E86
UPC
786680001529
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
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
330 kVA
Weathershield
WS35
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - MD330E86
Selling Policy 25-000 - Distribution and Control Products and Services
The DT-3 dry-type design with ventilated construction improves heat dissipation in demanding industrial environments, reducing thermal stress and extending service intervals. This directly supports higher uptime for motor drives and automation skids, translating to measurable productivity gains and lower maintenance costs. The drive isolation transformer provides galvanic isolation and EMI/RFI suppression, protecting sensitive control electronics and reducing drive faults in corrosive plant conditions. With 60 Hz three-phase operation and a 208 V primary feeding a 460Y/266 V secondary, it integrates smoothly with standard plant power and control voltages, simplifying cabinet design and wiring. The +5% and -5% tap adjustments (FCAN/FCBN) maintain voltage accuracy amid supply fluctuations, preserving drive performance and motor life. Aluminum windings and a rugged 919E frame offer reliable operation in harsh environments, while WS35 weather shielding adds outdoor or semi-enclosed protection. A 330 kVA rating supports large motor loads with room for transient spikes, improving system reliability and reducing costly downtime. The included warranty (one year from installation or eighteen months from shipment) mitigates procurement risk and supports maintenance planning. This solution aligns with industry best practices for energy efficiency, safety compliance, and lifecycle cost reduction in automation projects.
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FAQs
Yes. The MD330E86 is designed for 60 Hz three-phase operation with a 208 V primary, enabling straightforward integration with standard plant electrical systems and motor drive assemblies. It supports reliable voltage conversion to 460Y/266 V for downstream equipment, while maintaining compliance with UL safety requirements.
Key specs include a 330 kVA vat, 208 V primary, 460Y/266 V secondary, three-phase, 60 Hz operation, and a DT-3 dry-type design with aluminum windings. It features taps at +5% FCAN and -5% FCBN, a 150 °C rise insulation, and WS35 weathershield for enhanced environmental protection in industrial settings.
Ideal for motor drive isolation in factory automation, packaging lines, and plant-wide motor control centers. Its galvanic isolation and EMI suppression protect sensitive control electronics, while the dry-type construction and ventilated design support installation in enclosed electrical rooms or outdoor enclosures with WS35 protection.
The MD330E86 carries UL Listed certification, indicating safety compliance for industrial use. When installing, ensure adequate ventilation, proper clearance around the 919E frame, and correct tap selection for voltage accuracy. Follow Eaton’s warranty policy (one year from installation or 18 months from shipment) to optimize support and maintenance planning.
With a 330 kVA rating and robust dry-type construction, the transformer improves drive reliability and reduces unexpected downtime, delivering lower maintenance costs over time. The ventilated design and aluminum windings minimize thermal stress, while UL Listed compliance supports safer operation and faster procurement—enhancing overall lifecycle value for industrial automation projects.