4.1 short circuit protection: Short Circuit Protection: The power supply in the short releasing, to work properly restored. The power supply will be auto recovered when short circuit faults remove. 4.2 overcurrent protection (Over current Protection): overcurrent troubleshooting, power will automatically resume normal work. The power supply will be auto recovered when over current faults remove. 4.3 Overvoltage protection (Over Voltage Protection) When the output voltage exceeds the rated voltage, power protection, can not resume normal work after troubleshooting.