Eaton 7.2WKNHA200 Motor Fuse for MV Motors - BS 2692-1
Part Number: 7.2WKNHA200
Quick Summary
Eaton 7.2WKNHA200 Motor Fuse provides reliable motor protection for medium-voltage drives and heavy industrial motors. Engineers often face downtime when protection schemes are misaligned with motor ratings, leading to nuisance trips and costly maintenance. This model carries BS 2692-1 compliance and is built as a back-up class fuse, delivering robust interruption and fault-tolerant protection. Designed for easy integration with A3354730 nickel-plated fuse clips, it supports fast installation and reliable performance across MV motor protection scenarios. In busy plants, standardizing on this Bussmann series device can streamline spare-part inventories and training, while maintaining safety margins. It also aligns with common buying criteria for procurement teams seeking durable, compliant MV protection solutions.
Product Information
Extended Description
7.2WKNHA200 Eaton: Motor fuse-link, medium voltage, 200 A, AC 7.2 kV, 76 x 403 mm MV, back-up, BS, with striker HS
Product Name
Eaton Bussmann series medium voltage motor fuse
Catalog Number
7.2WKNHA200
UPC
051712545051
EAN
5027590488792
Product Length/Depth
403 mm
Product Height
76 mm
Product Width
76 mm
Product Weight
4584.3 g
Compliances
BS 2692-1
Amperage Rating
200 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 7.2 kV voltage rating paired with a 200 A amperage rating; Business Impact This combination enables safe, coordinated protection for large motors and drives operating at high voltage, reducing arc-flash risk and preventing unnecessary trips; Application Suitable for medium-voltage motor protection applications in manufacturing, pumping, and processing facilities, ensuring reliable operation under startup and switching surges. Feature 40 kAIC interrupt rating; Business Impact High fault-current handling minimizes equipment damage and enables selective coordination with upstream protection; Application Ideal for MV motor circuits where fault currents may spike during start-up or fault conditions, protecting both motor assets and power distribution. Feature Dimensions 403 mm length with 76 mm height and width; Business Impact Standardized form-factor simplifies replacement in existing MV fuse-holders and minimizes installation time; Application Fits common back-up fuse housings in industrial motor control panels. Feature Fuse type WKNH and Class back-up; Business Impact Provides reliable backup protection with controlled degradation, improving system availability and maintenance predictability; Application Useful in motor protection schemes requiring back-up protection for critical drives and fans. Feature Nickelled fuse clip compatibility with A3354730; Business Impact Streamlines maintenance and field service by ensuring a proven connection path and easier spare-part management; Application Facilitates quick field replacement and dependable electrical contact in harsh industrial environments. Feature BS 2692-1 compliance; Business Impact Helps ensure regulatory acceptance, traceability, and consistency across plants and supply chains; Application Supports procurement standards and quality audits in UK/EU and global operations.
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FAQs
The 7.2WKNHA200 is designed to fit standard MV fuse clips, specifically the A3354730 nickel-plated copper fuse clip. To install, power down the equipment, mount the fuse in the MV fuse holder, and secure the clip to ensure a solid electrical connection. Use the striker HS for back-up indication and verify correct alignment for reliable protection during startup and load changes.
Key ratings include an amperage rating of 200 A, a voltage rating of 7.2 kV, and an interrupt rating of 40 kAIC. These specifications define the fuse’s capability to safely interrupt fault currents while protecting the motor and drive circuitry during abnormal conditions in medium-voltage applications.
Yes. The fuse is BS 2692-1 compliant, reflecting its suitability for British standard motor protection applications. Its Class back-up construction provides robust protection for MV motors, supporting reliable operation in industrial environments and aligning with quality and regulatory expectations for motor protection components.
Ensure the fuse housing matches the 76 x 403 mm construction footprint and that the A3354730 fuse clip is used for proper contact. Verify the 7.2 kV rating matches your system voltage, and use the striker HS for back-up indication. Plan for straightforward maintenance and replacement in back-up circuits to minimize downtime during servicing.
Benefits include improved uptime due to robust 40 kAIC fault handling, reduced nuisance trips from well-matched ratings, and easier maintenance with a known clip interface. The BS 2692-1 compliance supports regulatory audits, while the back-up class design enhances protection coordination for large MV motors across processing facilities.