Eaton MD40E92ZZ Open core-coil transformer - UL Recognized
Part Number: MD40E92ZZ
Quick Summary
MD40E92ZZ is an open core-coil transformer used for drive isolation in three-phase distribution networks. Manufacturing facilities face voltage fluctuations and unplanned downtime, and this unit helps stabilize power delivery while protecting sensitive drives. UL Recognized certification underscores safety and compliance for industrial equipment, and the open-type core with ventilated cooling supports reliable operation in indoor switchgear and panel environments. With dry-type construction, aluminum windings, and a DT-3 frame, it delivers rugged performance, straightforward installation, and long-term value for Eaton power-distribution layouts. This makes it a strong fit for industrial automation projects seeking dependable, efficient power isolation and distribution with minimal maintenance.
Product Information
Extended Description
MD40E92ZZ 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: 912C
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
MD40E92ZZ
UPC
786680049729
Product Length/Depth
14 in
Product Height
24.75 in
Product Width
19.5 in
Product Weight
313 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 Recognized
Catalog Notes
Open type core and coil assembly
Coil material
Aluminum
Design
DT-3
Frame
912C
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
Feature: Open core-coil ventilated design. Impact: improved cooling and reduced temperature rise, increasing uptime in continuous operation. Application: motor drives and distribution panels in manufacturing facilities. Feature: 40 kVA rating with three-phase, 60 Hz performance. Impact: robust capacity to handle drive loads and support multiple outputs without paralleling. Application: single-transformer solutions for motor-control centers and distribution boards. Feature: Tap options at +5% FCAN and -5% FCBN. Impact: enhanced voltage regulation to accommodate site variations and protect connected equipment. Application: installations with fluctuating incoming voltages and sensitive motors. Feature: Aluminum windings and dry-type construction. Impact: lower maintenance, safer indoor installation, and easier compliance with indoor fire-safety standards. Application: panelboards, control cabinets, and confined plant spaces. Feature: DT-3 frame with 912C designation and 150°C rise. Impact: rugged, heat-tolerant performance in harsh environments with a compact footprint. Application: industrial facilities requiring durable isolation and distribution in restricted spaces.
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FAQs
MD40E92ZZ requires vertical or horizontal mounting with clear ventilation access. Plan for proper clearance around the open-core assembly and ensure compatible enclosure IP-rated protection for indoor installations. Use the 14 in depth, 19.5 in width, and 24.75 in height footprint to fit standard racks or panel arrays, and verify 60 Hz supply. Include appropriate lug connections and torque per manufacturer standards.
Key specs include a 40 kVA rating, three-phase configuration, 460 V primary voltage, 460Y/266 V secondary voltage, 60 Hz frequency, aluminum windings, and a DT-3 912C frame. It also features taps at +5% FCAN and -5% FCBN to accommodate voltage variations, with a 150 °C temperature rise rating suitable for indoor, ventilated environments.
Yes. Designed as a Drive Isolation Transformer, the MD40E92ZZ provides galvanic isolation for motor drives, helping to protect drives from supply transients and improve control stability. Its dry-type construction reduces fire risk, while the open-core design facilitates cooling around heat-generating drives, supporting reliable performance in manufacturing and process environments.
The MD40E92ZZ carries UL Recognized certification, reflecting adherence to essential safety standards for industrial equipment. While other certifications are not listed, the device’s open-type core/coil construction and dry-type insulation align with common industry safety and reliability expectations for indoor power distribution and drive isolation applications.
Maintenance is typically low due to its dry-type design and aluminum windings, reducing oil handling and leakage risks. The 40 kVA capacity supports versatile use in a single standalone transformer, potentially lowering footprint and installation cost. The robust DT-3 frame and 150 °C rise rating contribute to longer service life in demanding environments, improving total cost of ownership.