Eaton 7.2WKNHO224 Bussmann motor fuse - BS 2692-1
Part Number: 7.2WKNHO224
Quick Summary
Eaton Bussmann motor fuse protects medium voltage motors in industrial facilities, ensuring reliable start-up and shutdown. When fuses fail to interrupt faults quickly, downtime and equipment damage can drive up costs. This device is designed to meet BS 2692-1 compliance, aligning with industry standards for safe operation in motor circuits, and it supports back-up protection with a robust, non-indicating design. By integrating the WKNH fuse type and compatible fuse clip, it delivers dependable fault clearance in demanding environments. The solution also supports streamlined sourcing and installation within existing electrical protection schemes, helping engineers improve uptime and overall plant reliability.
Product Information
Extended Description
7.2WKNHO224 Eaton: Motor fuse-link, medium voltage, 224 A, AC 7.2 kV, 76 x 403mm, back-up, BS, with striker HS
Product Name
Eaton Bussmann series medium voltage motor fuse
Catalog Number
7.2WKNHO224
Model Code
7.2KV 224A 3" MOTOR START FUSE
UPC
051712837842
EAN
5027590488846
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
224 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
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
High amperage and voltage rating translate to robust motor protection in demanding environments, reducing the risk of cascading faults and costly downtime. Business impact: improved equipment availability and safer startup sequences; application: large motors in pumps, fans, and conveyors. The back-up, non-indicating design with a striker HS provides reliable fault clearance even in noisy electrical rooms, cutting maintenance time and enabling quicker service swings. Business impact: faster repair cycles and minimized production loss; application: medium voltage motor starts and protection panels. Compliance to BS 2692-1 assures regulatory alignment and safer operation in standard motor protection schemes, supporting audits and certifications. Business impact: easier compliance reporting and risk reduction; application: industrial facilities with strict quality controls. The 76 x 403 mm construction size, single barrel WKNH fuse, and compatibility with A3354730 nickel-plated copper fuse clips simplify retrofits and new installs. Business impact: reduced installation time, standardized replacement parts, and consistent performance across fleets; application: upgrade projects and new plant builds. Packaging is Standard, aiding logistics and warehouse planning, while the Class back-up designation clarifies the intended protective role. Business impact: clearer maintenance planning and lifecycle cost predictability.
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FAQs
The 7.2WKNHO224 is designed to pair with the A3354730 nickel-plated copper fuse clip for secure, reliable contact. Ensure compatibility with existing motor starter assemblies and maintain proper alignment within the fuse housing to avoid mis seating. Check clip cleanliness, torque specifications on mounting hardware, and confirm the single barrel WKNH design fits the targeted panel space. This streamlines retrofits and reduces field wiring errors, contributing to faster, safer installations.
The 7.2WKNHO224 provides 224 A amperage rating, 7.2 kV voltage rating, and a 40 kAIC interrupt rating. These specifications enable rapid interruption of fault currents in medium-voltage motor circuits, protecting motor windings during short circuits and ensuring safe disconnection under fault conditions. This combination supports reliable motor protection for high-demand applications such as pumps, fans, and conveyors in industrial facilities.
Yes, the 7.2WKNHO224 is compliant with BS 2692-1, aligning with recognized British standards for medium-voltage motor protection fuses. This certification helps satisfy regulatory and safety requirements, simplifies quality audits, and provides confidence that the fuse design meets established performance criteria for interruption, reliability, and compatibility with Bussmann series protection systems.
Yes. Classified as a Class back-up fuse with non-indicating indicators, the 7.2WKNHO224 is suitable for back-up protection in motor starter configurations. It provides an additional layer of fault interruption beyond primary protection, enhancing overall system reliability. Ensure installation follows the recommended fuse type WKNH and clip pairing for proper back-up protection sizing.
Using the 7.2WKNHO224 can reduce downtime by delivering fast, reliable fault clearance, lowering the risk of costly outages in medium-voltage motor circuits. Its compatibility with standard Bussmann clips and standard packaging eases stocking and replacements, reducing maintenance complexity. Over time, predictable lifecycle costs improve ROI through fewer unplanned outages and streamlined procurement.