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Common Safety Requirements for Switching Power Supplies
2023-12-08
As an important electronic product, the safety requirements of switching power supply are crucial, mainly including the following aspects:
Grounding protection: Grounding is the most basic safety protection measure for switching power supply, which can effectively prevent electric shock accidents. The grounding terminal of the switching power supply must be reliably connected to the safety grounding terminal, and the grounding resistance should be less than 1 ohm.
Overcurrent protection: Overcurrent protection can prevent the power supply from being damaged due to overload or even causing fire. Switching power supplies generally use fuses or circuit breakers for overcurrent protection.
Over-voltage protection: Over-voltage protection prevents the power supply from being damaged due to excessive grid voltage. Switching power supplies generally use varistors or thyristors for overvoltage protection.
Short-circuit protection: short-circuit protection prevents the power supply from being damaged by short-circuit. Switching power supplies generally use fuses or circuit breakers for short-circuit protection.
Leakage protection: leakage protection can prevent the human body from electric shock. Switching power supply generally use leakage protector for leakage protection.
In addition, switching power supply should also meet the following safety requirements:
Temperature protection: Switching power supply generates heat during the working process, so temperature protection is needed to prevent the power supply from overheating and damage.
Lightning protection: The switching power supply should have lightning protection to prevent damage to the power supply caused by lightning strikes.
Moisture and dust protection: The switching power supply should have the function of moisture and dust protection to prevent the power supply from being damaged by moisture and dust.
Anti-interference: The switching power supply should have anti-interference function to prevent the power supply from being damaged by electromagnetic interference.
The safety certification of switching power supply is an effective means to ensure its safety and reliability. Common switching power supply safety certification includes:
China CCC certification: CCC certification is the People's Republic of China mandatory product certification system, is the most authoritative switching power supply safety certification.
European Union CE certification: CE certification is a mandatory certification of the European Union, is the passport for switching power supplies to enter the EU market.
UL certification: UL certification is the most authoritative safety certification in the U.S., which is the passport for switching power supply to enter the U.S. market.
Switching power supply designers should strictly comply with the relevant safety requirements to ensure the safety and reliability of the switching power supply.