Eaton MD40E92 Motor drive isolation ventilated transformer - UL Listed
Part Number: MD40E92
Quick Summary
Eaton MD40E92 motor drive isolation ventilated transformer provides reliable power isolation for drive systems in industrial facilities. Cramped panels, voltage spikes, and heat buildup often drive maintenance costs and unplanned downtime. UL Listed safety certification ensures compliant, safe operation in control panels and during routine service. The unit is a three-phase, 60 Hz dry-type DT-3 transformer with 40 kVA, 460 V primary and 460Y/266 V secondary, featuring aluminum windings, WS38 weather shield, and a 150 °C rise. Its 912B frame and selectable taps (+5% FCAN, -5% FCBN) enable precise voltage matching for varying plant loads.
Product Information
Extended Description
MD40E92 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, 40 kVA, Al windings, Frame: 912B, uses WS38
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD40E92
UPC
786680331732
Product Length/Depth
16.5 in
Product Height
30 in
Product Width
23 in
Product Weight
358 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
912B
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
40 kVA
Weathershield
WS38
Feature: Ventilated dry-type DT-3 design. Benefit: Enhanced cooling and safer operation in compact control panels, reducing enclosure heat and particulate buildup. Application: Ideal for motor drive isolation in automated production lines. Feature: 40 kVA, three-phase with 460 V primary and 460Y/266 V secondary. Benefit: Ample headroom to support drives while maintaining stable voltage during load changes, improving motor performance. Application: Drive isolation in medium-size motor control centers. Feature: Tap changes at +5% FCAN and -5% FCBN. Benefit: Precise voltage regulation under varying load and supply conditions, minimizing drive nuisance tripping. Application: Plant-wide drive consistency and reliability. Feature: Aluminum windings. Benefit: Lower weight and corrosion resistance for easier handling and lower lifetime maintenance costs. Application: Installation in harsh or humid environments. Feature: WS38 Weathershield with DT-3 dry-type construction. Benefit: Enhanced protection against environmental exposure, extending service life. Application: Indoor/outdoor installations with protection needs. Feature: Frame 912B and 16.5 in depth with 23 in width and 30 in height. Benefit: Predictable footprint for panel integration and easier procurement of mounting hardware. Application: Retrofit or new-panel builds in industrial settings.
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FAQs
Install MD40E92 in a ventilated enclosure with adequate clearance to allow convection cooling. Plan for a fixed-mount installation given the 358 lb weight and 912B frame. Connect to a three-phase 460 V supply and use the taps at +5% FCAN and -5% FCBN to match site voltage, adhering to local codes and wiring practices.
Key specs include a 40 kVA rating, three-phase, 60 Hz operation, primary voltage of 460 V, secondary of 460Y/266 V, DT-3 dry-type design, aluminum windings, WS38 weather shield, and a 150 °C rise. Tap options are +5% and -5% to accommodate voltage variations, with a 912B frame.
Yes. The unit is specifically designed for drive isolation in motor control environments, decoupling drive electronics from the power source to reduce transients and electrical noise. Its ventilated dry-type construction supports reliable performance in standard 60 Hz, three-phase plants, with configurable taps for voltage matching.
MD40E92 carries UL Listed safety certification, confirming compliance with recognized electrical safety standards for control-panel installations. While CE or IP ratings are not listed in the provided data, UL Listing provides a strong safety baseline for industrial applications.
Warranty is Eaton’s standard policy: one year from installation or eighteen months from shipment, whichever occurs first. Eaton support includes technical guidance on installation, troubleshooting, and integrating the transformer into existing drive architectures.