Eaton Bussmann Fuse Application Areas

Analysis of applications of fuse products in various fields

Energy Storage Systems

Energy storage systems, especially batteries, are at risk from DC high voltage and potentially high short-circuit currents.

- Location of application: fuses are usually installed inside battery clusters / battery packs, on the DC side of the energy storage converter (PCS), and in the flow cabinet to prevent thermal loss caused by circulation failure between battery modules or external short circuits.

- Selection key: need to choose DC special fuse, the frontal voltage to cover the system voltage (such as DC1000V, 1500V or even 2000V). High fault resistance is also required to safely cut off the fault current. For example, Bussmann offers EVH, BS88, FWH-C series for energy storage systems, covering different voltage levels. The industry trend is to use smart fuses to achieve inter-level protection matching and reduce maintenance costs.

Electric vehicles

The high-voltage electrical architecture of electric vehicles (usually 400V to 800V) requires extremely high volume, vibration resistance and reliability of protection devices.

- Application location: inside the battery pack (main circuit protection), high voltage circuit of on-board filling motor (OBC), DC-DC converter, air regulator and PTC heater.

- Key Selection: High-pressure fast fuses need to be used, with high vibration resistance (such as bolt-mounted) and a compact size. For example, Bussmann's CBX series (800 VDC) is designed for applications such as charging stations. SCHURTER's ADO series is also designed for electric vehicle BMS and OBC, emphasizing vibration and arc safety.

Photovoltaics and Wind Power

The environment for new energy generation is complex (outdoors, large temperature difference, risk of lightning strike), and photovoltaics are direct current systems.

- PV applications: fuses are used for PV cluster protection (preventing reverse current), converters and the DC side of the inverter. Need to choose photovoltaic dedicated DC fuse (such as Bussmann PV series), weather resistance, can withstand ultraviolet, high temperature and humidity.

- Wind power applications: to protect wind turbine converters, generators and low-voltage side of a converter against grid fluctuations and lightning surges. Brands such as Milson offer special overcurrent protection schemes for wind energy adapted to harsh environments. Products such as Bussmann's BS88 series are also widely used in such industrial applications.

Metallurgy and Paper

These two industries are traditional heavy industries, characterized by continuous production, heavy load, and harsh environment (high temperature, dust).

- Location of application: Mainly protects the power supply circuits of large motors, transmissions (frequency converters), rollers and paper mills.

- Selection Key: Industrial fuses with high breaking capacity (e.g. gG / gL or aM characteristics) are required to cope with inrush currents and potential short-circuit faults at motor start-up. Bussmann's BS88 British Standard series (up to 1250 A frontal and static currents) and high-speed fuses are often used to protect such heavy duty equipment and power semiconductors. Qingdao Precision's website also explicitly mentions that it serves the metallurgical and paper industry and acts as an agent for related protection products.

Port machinery

Port machinery (shore bridges and field bridges) are mostly outdoor heavy equipment and involve shore power connections.

- Location of application: Protection in shore power receptacles (mine protection, short circuit protection), protection of the crane's variable frequency drive system.

- Selection Key: Shore electrical boxes usually require protection configurations in accordance with international standards, with fuses for protection of the front end of the lightning protector (SPD) or control circuit. For the high-power converter of the crane, it is necessary to use a fast fuse to protect the power devices such as IGBT. Littelfuse's High Speed Fuse Materials specifically refer to "Lifting Machines and Heavy Lifting Equipment."

Data center

Data centers have extremely high requirements for power continuity, and as the power density of AI servers surges, protection needs are evolving.

- Application locations: Continuous Power Supply (UPS), Distribution Unit (PDU), Server Power Rack and Battery Backup Unit (BBU).

- Selection key: Industrial fuses have traditionally been used for high current protection. For modern 48VDC AI server architectures, high-current, high-breaking-capacity, compact surface-mount fuses are required. For example, the NANO2 708 series from Littelfuse (60A-200A, 14ka at 80VDC) is designed for high-density power distribution to save space and support automated assembly. Bussmann also offers a full range of protection solutions for digital reference centers.

The choice of fuses is based on scenario determining parameters: energy storage / electric vehicles value DC high voltage and disconnect, new energy generation value weather resistance and specialty, heavy industry value high current and durability, and data centers increasingly value miniaturization and high density.

QDCR ELECTRIC, as a Tier 1 agent of Eaton Bussmann, covers the above application areas and is ready to provide comprehensive technical solutions support to customers and friends. Calls are welcome.