Eaton MD770E89 Motor Drive Isolation Transformer - UL Listed
Part Number: MD770E89
Quick Summary
Eaton MD770E89 Motor Drive Isolation Transformer delivers reliable voltage isolation for three-phase drive systems in industrial facilities. Engineers routinely face downtime, EMI, and voltage sag when tying large motor drives to variable power sources. UL Listed safety certification accompanies this DT-3 dry-type, ventilated transformer designed for industrial use. With a 230 V primary and 460Y/266 V secondary, it supports scalable, compliant motor-drive installations that minimize wiring complexity. In practice, you gain predictable performance, straightforward commissioning, and clear maintenance visibility through the included documentation. This model aligns with plant reliability goals and supports future expansion in automation projects.
Product Information
Extended Description
MD770E89 Eaton: Eaton 770 kVA Rating; 3-Phase; DT-3 Drive Isolation Transformer; Ventilated; 230; 460Y/266; 150 Degree C; Aluminum Windings
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD770E89
UPC
786680337154
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
460Y/266 V
Temperature rise
150 °C rise
Feature: High-capacity 770 kVA, three-phase DT-3 drive isolation transformer with ventilated enclosure and aluminum windings. Business Impact: Delivers robust load handling and effective isolation to protect sensitive motor drives from grid disturbances, reducing startup surges and EMI, which translates to fewer unplanned outages and longer equipment life. Application: Ideal for large conveyors, pumps, and automation lines in manufacturing facilities where uptime and reliability are non-negotiable, including packaging, metalworking, and process plants. Long-tail keywords: dry-type transformer, drive isolation transformer, 770 kVA transformer. Feature: 60 Hz operation with a 230 V primary and 460Y/266 V secondary. Business Impact: Enables direct compatibility with common North American distribution schemes while delivering precise secondary voltages for motor drives, improving control accuracy and efficiency. Application: Suitable for machine tools, robotics cells, and stationary equipment requiring stable drive voltages. Long-tail keywords: 3-phase transformer, 230V to 460Y/266V, factory power distribution. Feature: Dry-type DT-3 construction with ventilated cooling and aluminum windings; temperature rise rated at 150°C. Business Impact: Enhances thermal tolerance and durability in hot factory environments, reducing cooling infrastructure needs and extending service intervals. Application: Industrial control panels, switchgear rooms, and confined spaces where air cooling is leveraged. Long-tail keywords: ventilated dry-type, DT-3 insulation class, aluminum windings. Feature: Tap changes at +5% FCAN and -5% FCBN. Business Impact: Maintains motor performance during feeder voltage fluctuations, preventing under- or over-voltage conditions that erode efficiency and equipment life. Application: Sites with long feeder runs or variable utility input, such as remote manufacturing cells and multi-line facilities. Long-tail keywords: voltage tap changers, voltage regulation transformer. Feature: UL Listed certification and Eaton warranty policy. Business Impact: Delivers safety compliance and predictable support, easing procurement, risk management, and maintenance planning. Application: Suitable for regulated industrial environments and multi-site deployments where standardization matters. Long-tail keywords: electrical safety certification, plant-wide standardization. Feature: Documentation and compatibility notes included. Business Impact: Accelerates installation, commissioning, and future upgrades, while enabling easier audits and spare-part planning. Application: Engineering teams deploying drive isolation transformers across facilities with common documentation needs.
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FAQs
MD770E89 is a DT-3 dry-type, ventilated transformer rated for 3-phase operation. Install in a control panel or service area with adequate ventilation, connect 230 V input to the primary terminals and 460Y/266 V to the motor drive, and ensure proper clearance for cooling. Refer to the Eaton specification sheet for mounting torque, wire sizing, and terminal mappings. This unit is UL Listed, supporting safe integration into standard industrial enclosures.
Key specs include a 770 kVA rating, three-phase configuration, 60 Hz frequency, primary voltage of 230 V, and secondary voltage of 460Y/266 V. It features aluminum windings, a 150°C rise, and tap changes at +5% FCAN and -5% FCBN. The transformer is designed for ventilated, dry-type installation and UL Listed safety certification.
Yes. With its DT-3 dry-type construction, ventilated cooling, and drive-isolation capability, the MD770E89 is well suited for large motor drives in automation lines, conveyors, and pumps. Its voltage matching and EMI mitigation enhance drive reliability, while the rugged aluminum windings handle sustained industrial loads.
The MD770E89 carries UL Listed certification, confirming compliance with safety standards for electrical equipment. This helps with regulatory alignment, procurement approvals, and risk management in industrial installations across multiple sites.
Eaton’s warranty for this product follows policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This provides a clear, predictable basis for maintenance planning and support in long-duration automation projects.