Fill the fuse with a general square tube, built-in quartz sand and melt, breaking capacity,
Fill-free Closed Fuse The melt is fitted into a What is a quick fuse:closed cylinder with a small breaking capacity for 500V or less, 600A or less power distribution or power distribution equipment.
for the voltage level 500V below the current level of 1KA the following circuit.
Closed fuses are divided into filler fuses and fillerless fuses, as shown in Figure 3 and Figure 4
