The protection methods of electromagnetic induction heaters can include the following:

1. Overload protection: By monitoring the magnitude of current or power, when the current or power of the electromagnetic induction heater exceeds the set value, the system will trigger overload protection, automatically cut off the power supply or take other measures to prevent equipment overload damage.

   
   

2. Overheat protection: Monitor the temperature of the electromagnetic induction heater through devices such as temperature sensors or thermistors. When the temperature exceeds the safe range, the system will trigger an overheating protection mechanism, such as automatically reducing power or turning off the heater, to prevent overheating from damaging the equipment.

3. Phase loss protection: Electromagnetic induction heaters usually require three-phase power supply. If one phase power supply is missing or the phase sequence is incorrect, the phase loss protection function can be used to prevent abnormal operation and damage of the equipment. The phase loss protection will automatically cut off the power supply to protect the equipment from power supply issues.

4. Overcurrent protection: In the circuit of electromagnetic induction heaters, overcurrent protection devices (such as fuses or electronic protectors) are usually used to limit the current within a safe range. When the current exceeds the preset value, the overcurrent protection device will cut off the power supply to prevent equipment damage or malfunction.

5. Touch protection: For some electromagnetic induction heaters used for heating liquids or with contact operation, touch protection function may be used to prevent personnel from electric shock injury. Touch protection can be achieved by applying insulation material to the heater shell or contact surface or using touch detection devices.

These are common protection methods for electromagnetic induction heaters, and specific protection measures and devices may vary depending on equipment design and application requirements. When selecting and using electromagnetic induction heaters, it is important to fully understand the technical specifications and operating instructions of the equipment to ensure appropriate protective measures are taken. At the same time, it is recommended to maintain and operate the equipment according to the guidance and requirements provided by the equipment manufacturer to ensure its safe operation