HIGH-VOLTAGE DIRECT-CURRENT THERMAL FUSE

摘要

A high-voltage direct-current thermal fuse comprising a high-voltage low-current thermal fuse connected to a high-voltage direct-current circuit. The high-voltage low-current thermal fuse comprises a casing, fusible alloy wires, wherein the fusible alloy wires are connected between the two leads. One of the leads is sequentially sleeved with an arc extinguishing sleeve and a spring. One end of the arc extinguishing sleeve is in contact with the fusible alloy wires; and the other end of the arc extinguishing sleeve is in contact with the spring. One end of the spring is connected to the inner end face of the casing; and the spring is in a compressed state. The high-voltage direct-current thermal fuse further comprises a conventional thermal fuse; or further comprises a current. The high-voltage direct-current thermal fuse solves the problem of timely arc cutting-off and can be directly applied to a high-voltage direct-current circuit.

主权项

1. A high-voltage direct-current thermal fuse, comprising a high-voltage low-current thermal fuse connected to a high-voltage direct-current circuit; wherein the high-voltage low-current thermal fuse comprising
a casing, a fusible alloy wire, encapsulated inside the casing, and a first lead and a second lead, and the first lead and the second lead extending outside the casing, wherein the fusible alloy wire is connected between the first lead and the second lead; either the first lead or the second lead being sequentially sleeved with an arc extinguishing sleeve and a spring; one end of the arc extinguishing sleeve contacting the fusible alloy wire; the other end of the arc extinguishing sleeve contacting the spring; one end of the spring being connected to an internal end face of the casing; and wherein, the spring is in a compressed state.