Eaton 7.2WKNHO250 Medium Voltage Motor Fuse - BS 2692-1
Part Number: 7.2WKNHO250
Quick Summary
Eaton 7.2WKNHO250 is a medium voltage motor fuse designed to protect industrial motors. Choosing the right fuse can reduce nuisance trips and downtime in critical drives. This BS 2692-1 compliant unit provides 250 A at 7.2 kV with 40 kAIC interrupt rating and is compatible with the A3354730 fuse clip. Its 76 x 403 mm footprint and non-indicating status support reliable motor protection in demanding environments while aligning with Bussmann series offerings and procurement standards. Procurement benefits include standardization with Bussmann catalogs and straightforward replacement parts. In practice, engineers value the striker feature for post-fault inspection and the compact, 76 x 403 mm packaging that fits common enclosures.
Product Information
Extended Description
7.2WKNHO250 Eaton: Motor fuse-link, medium voltage MV, 250 A, AC 7.2 kV, 76 x 403mm, back-up, BS, with striker
Product Name
Eaton Bussmann series medium voltage motor fuse
Catalog Number
7.2WKNHO250
UPC
051712837859
EAN
5027590488853
Product Length/Depth
403 mm
Product Height
76 mm
Product Width
76 mm
Product Weight
4673 g
Warranty
Not Applicable
Compliances
BS 2692-1
Amperage Rating
250 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
7.2WKNHO250~7-2WKNHO250~7.2KV 250A 3 MOTOR START FUSE
7.2WKNHO250~7-2WKNHO250~7.2KV 250A 3 MOTOR START FUSE
Feature: 250 A amperage rating provides robust protection for high-inertia motors during startup and fault conditions. Business impact: reduces coil damage and expensive rewinds, delivering lower total owning cost over the equipment life. Application: motors in manufacturing lines, pumps, fans, and conveyors where protection against overload and short circuits is critical. Feature: 7.2 kV voltage rating with 40 kAIC interrupt rating enables fast, reliable disconnection under fault conditions. Business impact: minimizes arc exposure and protects equipment and personnel, supporting safer, more stable production lines. Application: MV motor control and drive panels in heavy industry. Feature: 76 x 403 mm construction and single-barrel design simplify installation and retrofits. Business impact: lowers installation time and aligns with existing enclosures, reducing project risk. Application: standard fuse holders across new builds and refurbishments. Feature: BS 2692-1 compliance ensures regulatory alignment. Business impact: simplifies procurement, documentation, and audits. Application: global plants requiring certified motor protection.
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FAQs
The 7.2WKNHO250 uses a standard 76 x 403 mm footprint and a single barrel design, aligning with common MV fuse holders. It supports seamless retrofits and new builds when paired with the A3354730 nickel-plated copper fuse clip. The unit’s BS 2692-1 framework ensures you meet regulatory requirements while maintaining consistent spare-part availability across sites.
Key ratings are 250 A amperage, 7.2 kV voltage, and a 40 kAIC interrupt capacity. This combination enables robust protection during motor startup and fault events, delivering fast disconnection to minimize damage and downtime. The ratings are selected to support back-up protection for medium-voltage motors in demanding industrial environments.
The product data focuses on electrical performance and mechanical fit (76 x 403 mm) and does not specify an IP rating. For humid or harsh environments, pair the fuse with appropriately rated enclosures and consider environmental protection strategies. The non-indicating design favors external monitoring approaches in such settings.
The unit is non-indicating, so post-fault inspection relies on external monitoring or striker indication. After a fault, replace with an identical 7.2WKNHO250 within the Bussmann series and reuse the A3354730 fuse clip. Standard packaging and readily available spare parts help minimize downtime and keep motor protection systems current.
By delivering high interrupt performance (40 kAIC) at 7.2 kV and a robust 250 A rating, the fuse minimizes downtime from motor faults and reduces rewind costs. Compliance with BS 2692-1 simplifies audits, while compatibility with standard clips and enclosures streamlines procurement and maintenance, improving overall equipment availability.