Eaton 7.2WKNHA315 Medium Voltage Motor Fuse - BS 2692-1
Part Number: 7.2WKNHA315
Quick Summary
The Eaton Bussmann series medium voltage motor fuse protects motors in industrial drives and switchgear applications. Engineers often struggle with nuisance trips, extended downtime, and difficult integration when selecting motor protection devices. This solution carries BS 2692-1 compliance and is designed for back-up protection with a 7.2 kV rating and 315 A capacity, together with a 40 kAIC interrupt rating. With a compact 76 × 403 mm footprint, a back-up fuse type WKNH and the option to pair with the A3354730 nickel-plated copper fuse clip and striker HS, installation is straightforward and reliable. Using this fuse translates to safer motor operation, lower maintenance costs, and faster commissioning for heavy industry projects.
Product Information
Extended Description
7.2WKNHA315 Eaton: Motor fuse-link, medium voltage, 315 A, AC 7.2 kV,MV 76 x 403 mm, back-up, BS, with striker HS
Product Name
Eaton Bussmann series medium voltage motor fuse
Catalog Number
7.2WKNHA315
EAN
5027590488822
Product Length/Depth
403 mm
Product Height
76 mm
Product Width
76 mm
Product Weight
4320 g
Compliances
BS 2692-1
Amperage Rating
315 A
Interrupt rating
40 kAIC
Voltage rating
7.2 kV
Application
Motor protection
Class
Class back-up
Construction size
76 x 403 mm
Fuse type
WKNH
Used with
A3354730 Nickel-plated copper fuse clip
Type
fuse
Feature: 315 A amperage rating. Business Impact: Provides targeted protection for motor circuits, reducing the risk of nuisance outages and equipment damage. Application: Ideal for medium-voltage motor protection in industrial drives and switchgear. Feature: 7.2 kV voltage rating. Business Impact: Enables safe interruption of high-energy motor circuits and compliance with MV installation standards. Application: Suitable for MV motor protection in plant main feeders and motor starters. Feature: 40 kAIC interrupt rating. Business Impact: High fault-current handling minimizes damage during short-circuits, improving system reliability. Application: Critical for heavy-duty motors in demanding environments. Feature: Construction size 76 × 403 mm. Business Impact: Compact footprint eases installation in restricted enclosures and standard panels. Application: Retrofit projects and new builds with space constraints. Feature: Used with A3354730 fuse clip. Business Impact: Simplifies mounting and future maintenance, reducing downtime. Application: Streamlined upgrades and replacements in existing panels. Feature: Class back-up fuse with WKNH designation and striker HS. Business Impact: Clear protection classification and visible fault indication improve safety and maintenance planning. Application: Back-up protection in motor circuits within industrial facilities.
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FAQs
The 7.2WKNHA315 is specified to be used with the A3354730 nickel-plated copper fuse clip. This compatibility simplifies installation, reduces wiring complexity, and speeds up maintenance by ensuring a secure, consistent fuse clip interface in standard MV motor protection assemblies.
The fuse provides 315 A amperage, 7.2 kV voltage rating, and a 40 kAIC interrupt rating. These ratings enable reliable protection for medium-voltage motors while accommodating typical factory fault conditions and enabling safe shutdown during faults.
Yes. The device is specified as BS 2692-1 compliant, ensuring alignment with recognized British standards for motor protection accessories and facilitating compliant implementation in European and other markets that reference BS 2692-1.
With a 40 kAIC interrupt rating and a robust 7.2 kV operation, the fuse rapidly interrupts fault currents while protecting motor windings from overcurrent. The back-up class designation and striker HS enhance fault visibility and safety, reducing repair times and safeguarding personnel during servicing.
Plan for a 76 × 403 mm footprint in your MV protection panel, and ensure compatibility with the A3354730 fuse clip. The device is designed for straightforward back-up motor protection and should be mounted in accordance with standard MV enclosure practices to maximize accessibility for maintenance and testing.