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Date：07-14-2025
High-power circuits are always exposed to issues like under- or over-current and short circuits. With our increased reliance on electricity, we need a way to protect electric circuits from these issues.
This is where bayonet fuse holders come into play. A bayonet fuse is a type of fuse holder that uses a twist-and-lock ( bay-o-net) mechanism to securely house a fuse. This provides a reliable and safe method to insert and remove fuses in low-to-medium electric circuits.
Let’s talk about how these fuses work, their types, benefits and how you can install them in your electrical systems.
How Bayonet Fuse Holders Work?
The name ‘bay-o-net fuse’ may confuse you a bit, but it works just like any normal switch you see, lightbulb sockets or a camera lens. A bayonet fuse typically has 3 major components.
● Fuse carrier
● Base of Socket
● Mechanical contacts
Here is how a transformer bayonet fuse normally works:
1. In the first step, the fuse is inserted into the holder.
2. A quarter turn twist is used to lock it in place using a spring-loaded mechanism or mechanical contacts.
3. This mechanism keeps the fuse in place and ensures firm electrical contact. It also helps prevent accidental removal and makes the fuse removal easier.
Once in place, the fuse helps ensure reliable connections to give you that much-needed peace of mind.
When compared to traditional non-loadbreak fuse links, bayonet fuse holders offer matchless performance. Here are some features that set them apart:
● Loanbreak capacity (With loadbreak tool)
● Oil immersed, sealed design
● Withstand high impulsive voltage (upto 150 kV)
● Plug-in mechanism
● Field-servicable
● High strength insulation materials (epoxy, porcelain, or high-grade polymer)
● Can be configured with various systems (8.3 kV, 15.5 kV, 25 kV, 34.5 kV)
Gone are the days when you could rely on internal expulsion fuses, or those non-loadbreak types. Now, a reliable fuse is a must.
Bayonet fuses come in various types, each suitable for a specific use.
● Panel-Mount fuse holder
● Inline (in-cable) fuse
● PCB-mount fuse holder
● Sealed fuse holder
● Multi-fuse fuse holders
With so many types for diverse uses, it's important that you select the right one for the job. Consider your voltage and current rating, fuse size and type, mounting space and accessibility to select the right Bayonet fuse holder.
These fuses are famous for their quick-access and twist mechanism, making them ideal in cases where quick and safe fuse replacement is needed. They are most commonly used in:
Pad-mounted transformers: They are utilised as a primary component to safeguard oil-filled transformers.
Underground distribution centres: Underground distribution is done mostly in loop systems. These transformer bayonet fuses are used to prevent overcurrent in these loops.
Medium voltage switchgear (upto 38 kV): They provide a secondary protection in an enclosed switchgear. Bayonet fuse integrates seamlessly with high-voltage bushings and compartments to provide clear isolation.
Utility distribution networks: Utility distribution is one of the most common uses of a bay-o-net fuse. It provides fast protection at the transformer level (like 11 kV/22 kV systems). They allow linemen to change fuses quickly when used with hot sticks.
Rail and Transit electric infrastructure: They are used in most high-voltage distribution cabinets along with electrified rail systems. They provide a compact, field-serviceable solution in harsh environments.
Apart from these applications, transformer bayonet fuses are used in renewable energy systems, wind turbine step-up transformers, mining and industrial power distribution and other applications where high-voltage applications where safe and secure fusing is required.
When looking to buy the best Bayonet fuse holder, choose Anhuang Electric Power. Our assembly fuse holder has everything you need to secure your transmission lines.
The product is well suited for high-voltage power supplies with Alternating Current of 50 Hz, standard voltage of 15.5 kV, and current rating of 140A. With over two decades of experience in electrical equipment manufacturing, Anhuang is proud of its product range.
Bayonet fuse holders have transformed how high-voltage power distribution systems work. They offer the perfect combination of reliability, safety and serviceability.
Whether used in renewable energy substations, industrial infrastructure, or residential power distribution, they offer robust protection from overcurrent while minimizing downtime.
Phone：0086-18967751149
Email：global@anelek.com
Address：No.27, Binhai South 3 road, Yueqing Economic Development Zone, Wenzhou City,Zhejiang Province,China.
