Interstage Coordination Of Fuses

In order to prevent the occurrence of leapfrog fusing and expand the scope of the accident, the fuses of the upper and lower (ie power supply trunk and branch lines) lines should have good cooperation. When selecting, the melt rated current of the upper-level (power supply main line) fuse should be 1 to 2 steps larger than that of the lower-level (power supply branch line). Commonly used fuses are tubular fuse R1 series, screw fuse RLl series, stuffing enclosed fuse RT0 series and fast fuse RSO, RS3 series.