Eaton Bussmann Medium Voltage Fuses

Reliable Protection for High-Voltage Electrical Systems

Eaton Bussmann Medium Voltage (MV) fuses provide robust and dependable overcurrent protection for distribution transformers, capacitor banks, switchgear, motors, and industrial power systems operating from 1 kV to 38 kV. Designed to meet global standards, these fuses ensure fast fault clearing, high interrupting capacity, and long operational life under demanding conditions.

With a heritage of innovation and engineering excellence, Bussmann MV fuses are trusted in utility, renewable energy, mining, oil & gas, and heavy industry sectors worldwide.

⚙️ Technical Overview

• Voltage Classes:

  • 2 kV, 3.6 kV, 7.2 kV, 12 kV, 17.5 kV, 24 kV, 36 kV

• Current Ratings:

  • From 1 A to 720 A, depending on application and voltage

• Breaking Capacity:

  • Up to 63 kA (symmetrical)

  • Designed for high fault currents in utility grids and industrial plants

• Operating Class:

  • Back-up (Type a) and Full-range (Type g) protection

  • Suitable for both transformer protection and general-purpose use

• Standards Compliance:

  • IEC 60282-1, DIN, ANSI/IEEE (select types)

  • Type-tested in accordance with international utility specifications

🔌 Fuse Types and Applications

• Indoor MV Fuses:

  • For metal-clad switchgear and dry-type transformers

  • Mounted in fuse bases or switch-fuse combinations

• Outdoor MV Fuses:

  • Weather-resistant, designed for pole-top and substation use

  • Encapsulated with weatherproof epoxy or porcelain housing

• Current-Limiting Fuses:

  • Fast-acting response to short circuits

  • Limits peak let-through energy (I²t)

• Expulsion Fuses:

  • Suitable for overhead lines and rural distribution systems

• Motor Protection Fuses (MV aM class):

  • Withstand motor inrush currents

  • Ideal for industrial MV drives and pump systems

• Capacitor Fuses:

  • Designed to protect individual or banked capacitor units

  • Low I²t, minimal risk of cascading failure

🏭 Key Industries Served

• Power Distribution Utilities

• Renewable Energy (Solar, Wind)

• Water and Wastewater Plants

• Mining and Quarrying

• Petrochemical and Oil & Gas

• Steel and Cement Plants

• Rail and Transportation Networks

• Data Centers and High-Voltage UPS

🧩 Installation Options & Accessories

• DIN-style and custom fuse bases

• Arc barriers and protective covers

• Mounting brackets and fuse disconnects

• Indicating and non-indicating designs

• Striker pin options for trip mechanisms and remote signaling

🔍 Example Part Numbers (indicative)

• 149KR – 3.6 kV, 40 A, indoor type

• 170H3722 – 7.2 kV, 63 A, with striker pin

• HSR9 – 12 kV, 200 A, outdoor type

• 170H5609 – 24 kV, 100 A, full-range

• KLR – ANSI-style expulsion fuses for overhead lines

✅ Why Choose Eaton Bussmann MV Fuses?

• Global standard compliance for safety and performance

• Proven reliability in harsh electrical environments

• Modular range for transformers, motors, capacitors, and lines

• Fast fault clearing to protect assets and minimize downtime

• Engineered for longevity with high dielectric and thermal strength

Whether you're designing a new medium voltage system or replacing legacy components, Eaton Bussmann MV fuses offer dependable protection, simplified installation, and broad compatibility. Contact us for technical support, datasheets, or help with selecting the right fuse solution.