1. Overload protection: The primary fuse of the transformer can protect the circuit from damage caused by overload, preventing high temperature and electromagnetic field caused by overload current from damaging the equipment.
2. Short circuit protection: During a short circuit, the current will instantly increase. The primary fuse of the transformer can quickly melt, cutting off the faulty circuit and preventing the fault from expanding or causing a fire.
3. Reliability assurance: Installing a transformer fuse once can improve the reliability of the circuit, prevent faults from being transmitted to other equipment, and ensure the safe operation of the entire circuit.
4. Convenient maintenance: A one-time fuse is an easily replaceable protective component. When a fault occurs, simply replace the fuse, which is convenient and fast.