Eaton MD660E92 Motor drive isolation transformer - UL Listed
Part Number: MD660E92
Quick Summary
Eaton MD660E92 motor drive isolation transformer protects drives and reduces electrical noise in three-phase industrial systems. This solution helps mitigate voltage spikes and harmonics that cause downtime and premature equipment wear. UL Listed with DT-3 dry-type construction and a 150 °C rise rating ensures reliability in harsh factory environments. Engineered as a ventilated, dry-type distribution transformer using aluminum windings and WS35 protection, it pairs rugged isolation with straightforward installation for space-constrained facilities. The 660 kVA rating supports mid-to-large motor loads, while the 460 V primary and 460Y/266 V secondary configurations offer flexible integration. This combination improves uptime, supports regulatory compliance, and lowers lifecycle costs for automation deployments.
Product Information
Extended Description
MD660E92 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266V, 150°C, 660 kVA, Al windings, Frame: 920E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD660E92
UPC
786680337406
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
3210 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
920E
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
460 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
660 kVA
Weathershield
WS35
Feature: DT-3 dry-type construction with aluminum windings delivers robust thermal performance and low-maintenance operation. This ventilated design dissipates heat efficiently in typical plant environments, reducing cooling needs and extending service life for connected drives. Business impact: lower total cost of ownership through decreased energy use, less heat-related wear, and fewer unplanned outages. Application: ideal for ventilated electrical rooms, mezzanines, or space-constrained installations serving motor drives in manufacturing lines. Feature: 660 kVA rating with 460 V primary and 460Y/266 V secondary, plus taps at +5% FCAN and -5% FCBN. Business impact: precise load matching and voltage adaptability minimize the need for additional transformers, cut capital expense, and simplify spare parts planning. Application: mid- to large-motor drives in single or multiple-drive configurations, with flexible delta-star configurations for varying plant voltages. Feature: Drive isolation reduces transients, harmonics, and electrical noise reaching motor controllers. Business impact: enhanced drive stability, fewer nuisance trips, longer controller life, and improved process reliability. Application: CNCs, conveyors, pumps, and automation lines where clean power and fast fault containment improve overall production uptime. Feature: WS35 weather shield and the 920E frame offer rugged protection and straightforward mounting. Business impact: easier installation, better environmental protection, and simplified maintenance scheduling in dusty, humid, or temperature-controlled facilities. Application: distribution rooms, industrial plant floors, and outdoor-rated spaces that demand durable, service-friendly transformers. Feature: UL Listed certification and Eaton warranty provide safety, regulatory alignment, and predictable vendor support. Business impact: simplifies compliance audits, strengthens procurement validation, and reduces risk of non-conformant equipment. Application: facilities pursuing formal safety programs, industrial automation upgrades, and long-term operational budgets.
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FAQs
When deploying the MD660E92 in a three-phase network, ensure proper ventilation and clearance around the 920E frame. Use the WS35 protection where environmental exposure is a concern and provide space for taps at +5% and -5% FCAN/FCBN. Plan routing for primary and secondary cables to minimize impedance and maintain accessibility for maintenance.
MD660E92 provides true drive isolation with a 660 kVA rating, 460 V primary, and 460Y/266 V secondary, reducing transients and electrical noise reaching drive controllers. The DT-3 dry-type construction with aluminum windings supports efficient cooling and long life, while UL listing confirms safety and install-ready compliance for industrial automation projects.
Yes. MD660E92 uses WS35 as its weather shield option and comes in a 920E frame designed for rugged environments. This compatibility supports installation in dusty, humid, or semi-outdoor spaces, delivering enduring isolation for motor drives without compromising service access or performance.
MD660E92 carries UL Listed certification for safety compliance and reliable field use. The transformer adopts a DT-3 dry-type design and a 150 °C rise rating, aligning with industry standards for dry transformers in industrial automation and electrical distribution applications.
The 660 kVA rating and drive isolation reduce nuisance trips and transients, improving uptime for CNCs, conveyors, and pumps. Aluminum windings and ventilated cooling cut cooling costs, while UL safety certification simplifies audits. Overall, facilities can expect lower maintenance costs, extended equipment life, and more predictable production outcomes.