Eaton MD550E92CU Motor Drive Isolation Transformer - UL
Part Number: MD550E92CU
Quick Summary
The Eaton MD550E92CU motor drive isolation transformer delivers clean, isolated power for three-phase drive systems in industrial automation. This design helps engineers combat voltage spikes, electrical noise, and downtime that disrupt sensitive motor-control electronics. UL Listed safety certification accompanies Eaton's DT-3 dry-type approach, reinforcing reliability and compliance in modern plants. With a 550 kVA rating, copper windings, and WS35 weather shielding compatibility, this transformer supports scalable, durable control power for harsh environments and growing optimization needs.
Product Information
Extended Description
MD550E92CU 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, 550 kVA, Cu windings, Frame: 920E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD550E92CU
UPC
786680064838
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
4107 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
Copper
Design
DT-3
Frame
920E
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
550 kVA
Weathershield
WS35
Feature → Business Impact → Application: Dry Type Distribution, Drive Isolation Transformer design (DT-3) delivers inherently safe, maintenance-friendly operation with low fire risk and reduced oil handling compared to liquid-filled types. This translates to improved uptime, easier audits, and lower total cost of ownership in control rooms and machine centers. Application: control cabinets and drive systems in automotive, packaging, and process industries benefit from cleaner power and minimized nuisance tripping. Feature → Business Impact → Application: Copper windings enable high efficiency and robust thermal performance under full 550 kVA load, reducing heat buildup and enabling longer service intervals. Application: large-scale conveyor lines and stamping presses require dependable power quality to sustain line speeds and product quality. Feature → Business Impact → Application: Tap size 1 at +5% FCAN and 1 at -5% FCBN provides voltage regulation to keep drive voltages within tolerance, lowering motor wear and startup transients. Application: variable-speed drives and robotics in intelligent manufacturing benefit from consistent performance. Feature → Business Impact → Application: Ventilated cooling and frame 920E support easy installation in elevated,rack-mounted or room-based environments; WS35 weather shield compatibility extends outdoor or warehouse deployment while preserving enclosure integrity. Application: outdoor substations, covered outdoor labs, and rugged manufacturing floors. Feature → Business Impact → Application: 36.23 in length, 75 in height, 44.2 in width, 4107 lb weight; robust physical footprint supports scalable power distribution in centralized electrical rooms, with straightforward retrofit or expansion. Application: factories planning capacity upgrades or plant-wide electrification. Warranty and compliance: 1-year Eaton warranty with standard terms (installation-based or shipment-based) ensures sustained support during early lifecycle; UL Listed certification provides safety assurance for procurement and integration teams.
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FAQs
Install as a floor-standing or cabinet-mounted unit with ample clearance for ventilation. Leverage the ventilated dry-type design (DT-3) to minimize enclosure heat, and position near the drive system to reduce cable losses. If outdoor or semi-outdoor usage is planned, consider WS35 shielding and follow the 36.23 in depth, 75 in height, and 44.2 in width footprint.
Key specs include a 550 kVA volt-ampere rating, 60 Hz frequency, three-phase configuration, 460 V primary voltage, and 460Y/266 V secondary voltage. It features taps at +5% FCAN and -5% FCBN, copper windings, a 150 °C rise rating, and a DT-3 dry-type design with frame 920E.
Yes. The three-phase, drive-isolation design with copper windings and voltage-tap options supports robust isolation and voltage stability for VFD applications, reducing electrical noise and startup transients while protecting drive electronics and control cabinets.
The MD550E92CU is UL Listed, which provides safety certification aligned with recognized standards. This certification facilitates procurement, integration, and compliance across industrial environments, and helps verify safety performance in motor drive isolation installations.
Eaton’s policy 25-000 offers a one-year warranty from installation or eighteen months from shipment, whichever comes first. This warranty supports early-life reliability, with access to Eaton support channels for field issues, spare parts, and service guidance during commissioning and operation.