Principles for opening holes for fans in electrical cabinets

1. Ensure ventilation and heat dissipation effect: The fan opening of the electrical cabinet should be large enough to ensure the ventilation effect, so that the electrical equipment can dissipate heat smoothly during operation, and will not affect its normal operation due to overheating.

2. Ensure safety: The fan openings in the electrical cabinet are set in safe locations to prevent accidental touching or other safety hazards.