1. Visual inspection: Check whether the shell of the explosion-proof starter has severe deformation, cracks, corrosion, or damage. If the shell is damaged, it may affect its explosion-proof performance and the normal operation of the internal components.

   
   

2. Abnormal function: If the starter cannot start or stop the motor normally, or if there are frequent tripping, malfunction, unstable control signal and other functional problems during the operation, it may indicate that the internal components are aged or damaged.

3. Decline in electrical performance: Use professional electrical testing equipment to detect the electrical parameters of the explosion-proof starter, such as insulation resistance, grounding resistance, contact resistance, etc. If these parameters exceed the normal range, it indicates that the electrical performance of the starter has declined, and there are potential safety hazards.

4. Component aging: Inspect the internal components such as contactors, relays, thermal relays, fuses, etc. If it is found that the contacts of the components are severely worn, the springs lose elasticity, the insulation materials are aged, discolored, or have an odor, replacement may be necessary.

5. Exceeding the service life: If the explosion-proof starter has reached or exceeded the service life recommended by the manufacturer, even if there are no obvious faults at present, replacement should also be considered to prevent potential faults and safety risks.

6. Maintenance cost: If the explosion-proof starter has frequent faults and the maintenance cost is too high, and the performance and reliability after maintenance cannot be guaranteed, replacing it with a new starter may be a more economical and safe choice.

7. Update of standards and regulations: When the relevant safety standards and regulations are updated and the existing explosion-proof starter cannot meet the new requirements, replacement is required to ensure compliance with the regulations.

8. Environmental adaptability issue: If significant changes have occurred in the working environment, for example, it has become more severe (such as a significant increase in temperature, humidity, and the concentration of corrosive gases), resulting in the explosion-proof starter being unable to adapt to the new environmental conditions, replacement should also be considered.