What Is a Bayonet Fuse Holder?

Bayonet fuse holders are typically used in conjunction with current-sensing fuses and dual-element fuse wires, which provide protection from both overload and short circuits. These holders are designed to house fuses that can operate in conditions with a voltage rating of up to 15.5 kV and current ratings of up to 140A.

The Bay-O-Net assembly is a specialized version of the bayonet fuse holder that is used primarily in oil-filled transformers. It is a compact and efficient device designed to offer safe, high-efficiency protection based on current load and oil temperature.

When a fuse wire is installed in the Bay-O-Net assembly, it provides both current sensing and temperature-based protection for the transformer. This dual functionality ensures that the equipment is shielded from dangerous overcurrent conditions and potential overheating, which could cause transformer failure or extensive damage.