A cryogenic fuse comprising a superconducting element arranged in a first chamber, the first chamber containing a cryogenic fluid, the cryogenic fuse being such that the superconducting element comprises a breaker initiation zone configured to determine a melting current and the first chamber is surrounded by a second chamber, placed under vacuum. The melting current or a melting time of the breakdown initiation zone may be adjusted.

A CutOut, comprising a first electrical connection rod; a second electrical connection rod; a first contact; a second contact; and a fuse wire; wherein the first contact is mounted to the first electrical connection rod; wherein the second contact is mounted to the second electrical connection rod; wherein when a current below a threshold levels flows through the vacuum-based fuseCutOut or no current flows through the vacuum-based fuseCutOut the vacuum-based fuseCutOut is configured to hold the first contact a fixed distance from the second contact and the fuse wire is configured to electrical connect the first electrical connection rod to the second electrical connection rod; and wherein when a current at or above the threshold flows through the vacuum-based fuseCutOut the fuse wire is configured to electrically disconnect the first electrical connection rod from the second electrical connection rod.

A CutOut, comprising a first electrical connection rod; a second electrical connection rod; a first contact; a second contact; and a fuse wire; wherein the first contact is mounted to the first electrical connection rod; wherein the second contact is mounted to the second electrical connection rod; wherein when a current below a threshold levels flows through the vacuum-based fuseCutOut or no current flows through the vacuum-based fuseCutOut the vacuum-based fuseCutOut is configured to hold the first contact a fixed distance from the second contact and the fuse wire is configured to electrical connect the first electrical connection rod to the second electrical connection rod; and wherein when a current at or above the threshold flows through the vacuum-based fuseCutOut the fuse wire is configured to electrically disconnect the first electrical connection rod from the second electrical connection rod.