Eaton MD40E94 Motor drive isolation transformer - UL Listed
Part Number: MD40E94
Quick Summary
Eaton MD40E94 motor drive isolation transformer stabilizes power for drive systems in industrial plants. End users often wrestle with voltage spikes, motor chatter, and premature equipment wear that disrupt production. UL Listed safety certification backs its use in regulated environments, while its DT-3 dry-type design and 912B frame support robust, space-conscious installations. By delivering clean, isolated power to motor drives, it helps reduce downtime and maintenance costs, and it integrates with WS38 weather shielding for outdoor or tough indoor spaces.
Product Information
Extended Description
MD40E94 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 575 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 230Y/133V, 150°C, 40 kVA, Al windings, Frame: 912B, uses WS38
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD40E94
UPC
786680338403
Product Length/Depth
16.5 in
Product Height
30 in
Product Width
23 in
Product Weight
310 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
575 V
Secondary Voltage
230Y/133 V
Temperature rise
150 °C rise
Volt ampere rating
40 kVA
Weathershield
WS38
Feature: Three-phase, dry-type distribution transformer with DT-3 design. Business Impact: Reduces fire risk and provides safer, more reliable power for drive systems. Application: Industrial plants requiring robust motor control in compact enclosures. Feature: Primary 575 V delta and secondary 230Y/133 V. Business Impact: Enables seamless integration with standard plant power and motor control circuits while maintaining voltage integrity. Application: Drives and auxiliaries in 575 V distribution networks. Feature: 40 kVA rating. Business Impact: Supports multiple drives or peak load without oversizing equipment. Application: Medium‑duty motor drive banks in conveyors and pumps. Feature: Aluminum windings and 912B frame. Business Impact: Improved thermal performance and durable, space-efficient installation. Application: Environments demanding long service life and easy retrofit. Feature: Taps at +5% and -5% FCAN/FCBN. Business Impact: Maintains voltage stability amid supply fluctuations, reducing motor stress. Application: Sites with variable utility conditions. Feature: WS38 weather shield integration. Business Impact: Enables outdoor or harsh indoor deployments with protection and serviceability. Application: Outdoor substations or production floors with exposure to dust or moisture. Feature: 60 Hz, three-phase operation. Business Impact: Aligns with mainstream North American industrial standards for motor drives. Application: Plant-wide drive systems and distribution networks. Feature: UL Listed certification. Business Impact: Supports compliance audits and safety certifications across the enterprise. Application: Regulated manufacturing environments seeking proven safety validation.
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FAQs
Install MD40E94 in a ventilated, accessible location with clearance for service and cooling. Mount on a rigid base, connect the 575 V primary in a delta configuration and wire the 230Y/133 V secondary to your motor drives. Confirm compatibility with WS38 weather shielding for outdoor or harsh indoor environments.
The transformer features a 575 V primary (delta) and a 230Y/133 V secondary, rated at 40 kVA, operating at 60 Hz in three-phase service. Taps include +5% FCAN and -5% FCBN to help regulate voltage under fluctuating input conditions.
Yes. With a DT-3 dry-type design, aluminum windings, and a 912B frame, the MD40E94 provides drive isolation, reduces electrical noise, and protects sensitive motor drives in three-phase systems typical of industrial automation.
The MD40E94 is UL Listed, confirming compliance with safety standards for electrical equipment used in industrial environments and helping with regulatory audits and safety programs.
Maintenance is minimized by a robust dry-type design with aluminum windings and a durable 912B frame. The 40 kVA rating supports scalable drive systems, reducing the need for frequent upsizing. The UL Listed certification also aids in compliance, potentially lowering downtime during audits.