Eaton 7.2WKNHO315 Medium Voltage Motor Fuse - BS 2692-1
Part Number: 7.2WKNHO315
Quick Summary
The Eaton Bussmann medium voltage motor fuse protects motor circuits by interrupting faults in high‑power drives, safeguarding industrial equipment across manufacturing and process facilities. Faced with rising motor startup transients and unexpected fault currents, engineers need a reliable protective device that minimizes downtime and prevents collateral damage. This solution adheres to BS 2692-1 standards, supporting back‑up protection in MV motor systems, and offers consistent performance under demanding conditions. In addition to protecting the motor, it helps simplify compliance and maintenance planning, while aligning with procurement goals for robust, long‑lead protection components. Use it alongside compatible clips for a complete, market‑tested protection strategy that reduces risk and total cost of ownership.
Product Information
Extended Description
7.2WKNHO315 Eaton: Motor fuse-link, medium voltage, 315 A, AC 7.2 kV, 76 x 403mm, back-up, BS, with striker MV
Product Name
Eaton Bussmann series medium voltage motor fuse
Catalog Number
7.2WKNHO315
UPC
051712837880
EAN
5027590488860
Product Length/Depth
403 mm
Product Height
76 mm
Product Width
76 mm
Product Weight
4793 g
Warranty
Not Applicable
Compliances
BS 2692-1
Amperage Rating
315 A
Interrupt rating
40 kAIC
Voltage rating
7.2 kV
Application
Motor protection
Barrels
1
Class
Class back-up
Construction size
76 x 403 mm
Fuse indicator
Non Indicating
Fuse type
WKNH
Used with
A3354730 Nickel-plated copper fuse clip
Packaging type
Standard
Type
fuse
7.2WKNHO315~7-2WKNHO315~7.2KV 315A 3 MOTOR START FUSE
7.2WKNHO315~7-2WKNHO315~7.2KV 315A 3 MOTOR START FUSE
Feature → Business Impact → Application: The 315 A amperage rating combined with a 7.2 kV voltage rating delivers strong fault current interruption for medium voltage motors, reducing arc energy and protecting drive trains in industrial plants. This translates to lower repair costs and less unplanned downtime in manufacturing lines and processing facilities. Application: ideal for MV motor protection in large drives and pump stations where reliable interruption is critical. Feature → Business Impact → Application: A 40 kAIC interrupt rating ensures rapid fault isolation, safeguarding switchgear and cables from damage during faults, which lowers maintenance frequency and extends equipment life. Application: suitable for high‑current motor circuits in continuous operation environments. Feature → Business Impact → Application: Class back‑up design with a single fuse barrel and non‑indicating status simplifies integration into existing protection schemes, reducing replacement time and enabling straightforward inspection in field service. Application: fits standard back‑up protection scenarios in mid‑voltage motor protection stacks. Feature → Business Impact → Application: Compatibility with A3354730 nickel‑plated copper fuse clips supports quick, secure installation and reliable contact performance, minimizing contact resistance and overheating risk. Application: preferred for Eaton Bussmann‑based motor protection assemblies in MV drives. Feature → Business Impact → Application: BS 2692‑1 compliance provides regulatory alignment and audit readiness, helping procurement teams meet industry standards while maintaining supplier confidence. Application: essential for regulated environments and projects requiring certified protection components.
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FAQs
For correct installation, pair the 7.2WKNHO315 with the recommended A3354730 nickel‑plated copper fuse clip to ensure a secure contact path. Verify clip compatibility, mounting arrangement, and conductor sizing to maintain low contact resistance and reliable trip performance in MV motor circuits.
The fuse provides 315 A current rating and 7.2 kV voltage rating with a 40 kAIC interrupt capacity. These ratings enable rapid fault interruption in medium‑voltage motor circuits, protecting motors and downstream equipment from high fault energy while supporting safe start‑ups and reduced arc energy.
Yes. With a high interrupt rating and robust construction, the fuse is designed for motor protection in demanding MV drives. Its back‑up class design and standard size support dependable operation in challenging environments, provided it is installed with compatible components and within BS 2692‑1 compliant systems.
This fuse is BS 2692‑1 compliant, ensuring alignment with recognized industry protective standards for medium voltage motor fuses. Compliance reduces audit risk, supports consistent protection performance, and facilitates cross‑vendor compatibility within motor protection assemblies.
Maintenance benefits include predictable replacement intervals and straightforward inspections due to its standardized form factor and non‑indicating indicator. ROI gains come from minimized downtime, reduced equipment damage, and easier procurement of a single, reliable MV protection solution suitable for multiple motor applications.