High-voltage current-limited thermal element for protecting voltage transformer

The utility model relates to a high-voltage current-limited thermal element for protecting a voltage transformer, which comprises a fuse tube, wherein, a porcelain knob is arranged in the fuse tube; fuse elements are wound around the porcelain knob and regularly spaced; press caps which are arranged at both ends of the fuse tube are filled with quartzite. The utility model has the advantages of small size, light weight, stable time-current characteristic, significant current limitation characteristic, low temperature rising, and small power consumption.