Eaton MD34E77 Motor drive isolation transformer - UL Listed
Part Number: MD34E77
Quick Summary
MD34E77 motor drive isolation transformer is engineered to provide safe, isolated power for industrial motor drives in control panels. Upgrading drive equipment often introduces heat, space, and wiring challenges; this ventilated dry-type design addresses those pain points with a compact footprint, accessible connections, and proven reliability. UL Listed safety certification supports robust compliance for industrial environments, while the unit adheres to 60 Hz three-phase operation and a 150°C rise for demanding applications. With aluminum windings, WS38 weather shield, and DT-3 design, it delivers durable performance in motor-control panels, drive rooms, and industrial cabinets, helping you optimize uptime and reduce maintenance costs. In short, it combines rugged construction with practical installation advantages for modern automation systems.
Product Information
Extended Description
MD34E77 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 480 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 240 delta, 150°C, 34 kVA, Al windings, Frame: 912B, uses WS38
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD34E77
UPC
786680051609
Product Length/Depth
16.5 in
Product Height
30 in
Product Width
23 in
Product Weight
329 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
480 V
Secondary Voltage
240 V
Temperature rise
150 °C rise
Volt ampere rating
34 kVA
Weathershield
WS38
Feature → Business Impact → Application: 34 kVA rating delivers ample headroom for motor drive loads, enabling scalable automation without oversizing transformers and reducing capital expenditure. This aligns with control-panel design goals, improving space utilization and heat management in compact enclosures used in manufacturing lines. Feature → Aluminum windings and dry-type insulation reduce weight and simplify maintenance, lowering installation and replacement costs while improving thermal performance in high-demand environments such as pump and conveyor drives. Feature → DT-3 design with ventilated cooling and WS38 weather shield enhances reliability in plant rooms and outdoor-rated panels, extending service life and reducing downtime in harsh conditions. Feature → Primary 480 V and secondary 240 V with taps at +5% and -5% FCAN/FCBN provide operating flexibility for site variations, supporting quick field adjustments without rewiring. Feature → Three-phase, 60 Hz operation ensures compatibility with standard industrial power systems, improving integration with existing motor drives and PLC-controlled equipment. Feature → 912B frame and 16.5 in length, 23 in width, 30 in height deliver predictable mounting footprints, easing panel layout and permitting faster installation. Feature → UL Listed certification confirms safety compliance, while warranty terms offer predictable after-sales support, helping procurement teams manage risk and ownership costs. Industry insight: leveraging a ventilated, loop-in transformer like MD34E77 in motor-control centers can improve drive isolation performance, reduce EMI concerns, and support more compact, serviceable automation architectures.
Get a Quick Quote for a Eaton MD34E77
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton MD34E77?
Enquire Now
FAQs
To integrate the MD34E77, prepare a 912B frame enclosure with adequate ventilation and clearances. Connect primary 480 V three-phase supply to the designated L-L terminals, and secondary 240 V to the drive input circuits. Use the +5% and -5% taps if site voltage varies, and ensure WS38 weather shield protection is in place for outdoor or harsh environments. Verify torque specs per Eaton guidelines and confirm UL compliance after installation.
Key specs include a 34 kVA VA rating, 480 V primary, 240 V secondary, 60 Hz, three-phase configuration, aluminum windings, and a 150°C temperature rise. The DT-3 dry-type design provides ventilated cooling, while the WS38 shield offers weather resistance. Taps are available at +5% FCAN and -5% FCBN to accommodate voltage variation without rewiring.
Yes. The MD34E77 is specifically designed for drive isolation in motor control panels and automation cabinets. Its ventilated dry-type construction, DT-3 design, and 34 kVA rating support drive isolation, EMI management, and reliable power to motor drives in industrial settings. The 480 V to 240 V output aligns with common drive input requirements, improving system cohesion.
The MD34E77 carries UL Listed safety certification, indicating compliance with recognized safety standards for industrial electrical equipment. This supports installation in regulated environments and helps with procurement validation. Always confirm region-specific markings and ensure the installation follows local electrical codes and Eaton installation guidance.
Maintenance benefits include a robust ventilated dry-type design, aluminum windings for corrosion resistance, and WS38 weather shielding, reducing service intervals and downtime. ROI gains come from reliable drive isolation, reduced EMI risk, compact footprint, and a warranty that covers installation-related exposure, all contributing to lower lifecycle costs and higher panel productivity.