The rated current of the low price dropout fuse cutout must be greater than or equal to the rated current of the fuse element. The selection of low price dropout fuse cutout elements is generally carried out according to the following principles:
(1) When the capacity of the distribution transformer is 100kVA and below, select components according to 2 to 3 times the rated current of the transformer; when the capacity of the transformer is above 100kVA, select components according to 1.5 to 2 times the rated current of the transformer.
(2) On-column power capacitors. On-pole power capacitors with a capacity below 30kvar are generally protected by low price dropout fuse cutout. The fuse element is generally selected according to 1.5 to 2.5 times the rated current of the power capacitor.
(3) 10kV user import. The fuse element imported by the user should generally not be less than 1.5 times the maximum load current of the user, and the fuse element of the primary side fuse of the user's distribution transformer (or other high-voltage equipment) should be considered one level smaller than the fuse element of the imported fuse.
(4) Branch lines. When installing low price dropout fuse cutout on branch lines, the fuse element should generally not be less than 1.5 times the load current, and should be at least one level larger than the largest distribution transformer primary side fuse element on the branch line.
When selecting a low price dropout fuse cutout element for an overhead line fuse, for the outlet line of a distribution transformer, it is generally sufficient to calculate the rated current; for user equipment, it is generally selected according to the maximum load current; for a capacitor, its reactive current is calculated.
low price dropout fuse cutout
low price dropout fuse cutout
