How is the overcurrent protection of the circuit in the intermediate frequency circuit?

How is the overcurrent protection of the circuit in the intermediate frequency circuit? If the load of the intermediate frequency power supply is short-circuited or the commutation of the inverter circuit fails, the three fully-controlled rectifier bridges will be used to short-circuit through the DC flat-wire welder. The short-circuit current flows through both the rectifier circuit and the inverter circuit.
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