Eaton 7.2WKMH7355 Motor fuse-link - 7.2 kV 63 kAIC
Part Number: 7.2WKMH7355
Quick Summary
Eaton motor fuse-link protects medium-voltage motors in industrial settings by interrupting faults quickly and safely. Sizing and coordinating protection for high-energy drives can be complex, risking unnecessary downtime. While CE, SIL, or IP certifications are common in this class, the listing notes factory compliance and standard values; verify with Eaton for specific approvals. Designed for motor protection and wired in Bussmann-series configurations, it offers reliable uptime benefits, easier procurement, and predictable maintenance for panel builders and end users.
Product Information
Extended Description
7.2WKMH7355 Eaton: Motor fuse-link, medium voltage, 355 A, AC 7.2 kV, 76 x 442 mm, back-up, BS, with striker, style 7 tags HS
Product Name
Eaton Bussmann series medium voltage motor fuse
Catalog Number
7.2WKMH7355
UPC
051712294355
EAN
5027590054683
Product Length/Depth
442 mm
Product Height
76 mm
Product Width
76 mm
Product Weight
5603 g
Warranty
Not Applicable
Compliances
Contact factory
Amperage Rating
355 A
Interrupt rating
63 kAIC
Voltage rating
7.2 kV
Application
Motor protection
Barrels
1
Class
Class back-up
Construction size
76 x 442 mm
Fuse indicator
Non Indicating
Fuse type
WKMH
Used with
A3354730 Nickel-plated copper fuse clip
Packaging type
Standard
Type
fuse
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Feature → Business Impact → Application: The medium-voltage motor fuse-link provides a 355 A rating at 7.2 kV with a 63 kAIC interrupt capability, enabling precise protection for high-energy motors while minimizing nuisance blows and equipment damage in drive systems. This translates to reduced downtime and longer motor life in manufacturing lines and pumping stations, especially where motor starts are frequent and demand high fault-ride-out capability. Application-wise, the back-up design (Class back-up, BS style) supports coordinated protection with compatible fuse clips, simplifying installation and maintenance in legacy and new control panels. Feature → Compatibility → Installation: Uses the A3354730 nickel-plated copper fuse clip for reliable seating and easy field replacement, with a single barrels configuration and standard packaging that fits typical electrical rooms. Feature → Operational Efficiency → ROI: Non-indicating fuse type reduces visual inspection time while delivering dependable protection, contributing to predictable maintenance intervals and lower total cost of ownership for critical HV motor circuits.
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FAQs
Installation requires the compatible A3354730 nickel-plated copper fuse clip and a single-barrel fuse design. Ensure correct seating in the fuse holder, observe the 76 x 442 mm construction size, and verify the non-indicating fuse indicator aligns with your panel status indicators. This setup supports straightforward field replacement and maintenance in standard MV motor circuits.
The device provides a 355 A amperage rating, 7.2 kV voltage rating, and a 63 kAIC interrupt rating. These ratings determine the maximum motor current, operating voltage, and interrupt capability during fault events. Properly matching these values to motor nameplate and system coordination ensures selective protection, minimizes nuisance trips, and preserves upstream protection devices.
This fuse is designed for medium-voltage motor protection in industrial drive systems, pumps, and conveyors. Its back-up class and BS style support robust fault management in high-energy environments. Confirm your motor’s voltage class, short-circuit current, and enclosure conditions to ensure compatibility with the 76 x 442 mm package and single-barrel configuration.
The listing indicates Compliances: Contact factory, so verify with Eaton for CE, SIL, IP, or other regulatory certifications applicable to your region and application. Cross-check system requirements, motor protection standards, and any industry-specific compliance needs before procurement to ensure full regulatory alignment.
The non-indicating fuse type reduces routine visual checks, while reliable fault interruption and a proven 7.2 kV, 355 A rating minimize unplanned downtime. In practice, this supports predictable maintenance cycles, improved motor protection, and a lower total cost of ownership for critical HV motor circuits in manufacturing and processing facilities.