Eaton MD770E90 Motor Drive Isolation Transformer - UL Listed
Part Number: MD770E90
Quick Summary
The Eaton MD770E90 motor drive isolation transformer delivers clean, isolated power for drive systems in industrial automation. Engineers rely on stable power to protect sensitive drive electronics from transients and voltage ripples, reducing unplanned downtime. This solution carries UL Listed safety certification and features a DT-3 dry-type, ventilated design that thrives in demanding plant environments. With a 770 kVA rating, three-phase capability, and 60 Hz operation, it supports scalable motor control from a 230 V input to a 575Y/332 V output. The design optimizes installation in control panels and MCCs, while offering rugged aluminum windings and a 150°C rise to maximize life, reliability, and return on investment.
Product Information
Extended Description
MD770E90 Eaton: Eaton 770 kVA Rating; 3-Phase; DT-3 Drive Isolation Transformer; Ventilated; 230; 575Y/332; 150 Degree C; Aluminum Windings
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD770E90
UPC
786680337253
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
0.001 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
Tap size
1 at +5% FCAN, 1 at -5% FCBN
Type
Dry Type Distribution, Drive Isolation Transformer
Frequency rating
60 Hz
Kva Rating
770 kVA
Phase
Three-phase
Primary voltage
230 V
Secondary Voltage
575Y/332 V
Temperature rise
150 °C rise
Block 1: Feature: 770 kVA three-phase rating with drive isolation. This configuration delivers robust power conditioning for large variable-speed drives, slashing transients and reducing motor wear in demanding manufacturing environments. Application: Ideal for CNCs, conveyors, pumps, and metal forming lines where uptime and process precision drive the ROI. Block 2: Feature: Ventilated dry-type construction. This design enhances cooling efficiency and simplifies installation in switchgear rooms and control panels. Application: Suited for plant floors, machine shops, and OEM assemblies requiring safe, low-maintenance power conditioning. Block 3: Feature: DT-3 design. The drive isolation architecture minimizes electrical noise transfer to control systems. Application: Integrates with Eaton drive ecosystems in OEM equipment and aftermarket drive retrofits. Block 4: Feature: 230 V primary and 575Y/332 V secondary. This broad voltage band supports seamless interfacing with common industrial power rails and downstream drive inverters. Application: Serves mixed-voltage motor fleets and retrofit projects across automotive, packaging, and food & beverage lines. Block 5: Feature: Tap size of +5% FCAN and -5% FCBN. On-site voltage tuning accommodates supply variations without replacing hardware. Application: Facilitates stable torque and performance in environments with unstable mains or long feeders. Block 6: Feature: Aluminum windings and 150 °C rise. Aluminum windings are lightweight and durable, while the heat rating supports continuous operation in hot production lines. Application: Resilient performance for 24/7 motor control centers in metal, cement, and mining sectors. Block 7: Feature: UL Listed certification. Safety certification underpins compliant procurement and installation. Application: Preferred for regulated industries, panel builders, and integrators seeking trusted, auditable equipment. Block 8: Feature: Compatibility and installation advantages. The MD770E90 is designed for straightforward rack mounting in MCCs, with an Eaton-backed warranty and documented specification sheets. Application: Accelerates project timelines and reduces commissioning risk in new builds and retrofits.
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FAQs
MD770E90 is a three-phase dry-type transformer designed to fit standard MCC racks and control panels. Its ventilated, DT-3 design eases thermal management and simplifies wiring, while the 230 V to 575Y/332 V outputs support straightforward integration with common plant power rails and drive inverters.
Key specs include a 770 kVA rating, 60 Hz frequency, primary voltage 230 V, secondary voltage 575Y/332 V, aluminum windings, and a 150 °C rise. This combination delivers robust drive isolation, reduced transients, and improved motor life for large variable-speed drive systems.
Industries with heavy automation and conveyor systems—such as automotive, packaging, metals, and plastics—benefit most. The transformer supports CNCs, pumps, and long-run motors that require reliable drive isolation and stable voltage under varying load conditions.
The MD770E90 carries UL Listed certification, confirming safety compliance for industrial installations. This supports approved procurement, safer commissioning, and auditable documentation in regulated environments.
Low-maintenance dry-type construction, aluminum windings, and a robust 150 °C rise contribute to higher MTBF in continuous operation. The transformer reduces downtime from transients, lowers energy losses in drive systems, and simplifies installation, delivering a favorable total cost of ownership.