What should I do about the short circuit fault on the secondary side of the transformer? When the transformer causes a short circuit fault on the secondary side, a mechanical fault such as a grounding system, the secondary side will cause a short circuit capacity that is 20 to 30 times higher than the rated current. , and on the primary side will eventually lead to a large current to counteract the demagnetization effect of the short-circuit capacity of the secondary side. Such a large current acts on the high operating frequency winding, causing a large industrial equipment stress field inside the capacitor, resulting in When the capacitor becomes smaller, its cable sheath gasket and protective layer pad will fall down, the transformer transformer iron core straight hair splint screw is loose, and the high-voltage coil is sturdy or broken, resulting in the transformer being destroyed in a very short period of time.

For the short-circuit fault on the secondary side of the transformer, do the following:

Improper selection of primary/secondary solution power distribution equipment transformers Therefore, if the selection of the fuse current is too large, it will not play a role in maintenance. If the fuse current selection is too small, it will be easy to fuse under all normal operating conditions, resulting in the interruption of the customer's power supply and distribution system. At this time, if the three-phase fuse only fuses one phase, it will cause greater damage to the customer.

Therefore, in all normal use, the selection criteria for fuses are: the fusing current of the primary fuse is 1.5 to 2 times the rated current of the transformer primary; the fusing current of the secondary fuse is the rated current of the secondary side of the transformer.