Most power supplies are equipped with one cooling fan inside. When the fan fails, the system is now at risk. To increase the thermal protection, a secondary cooling fan is provided inside the power supply. This fan remains idle until there is a change in the system temperature. When the internal circuitry detects a high operating temperature, the secondary fan is activated to provide the needed cooling. Beside the added thermal protection against overheating, redundant cooling protects and prolongs the lifetime of the power supply.
In addition to redundant cooling, chassis overheating fan is utilized for extra protection. Under normal operating temperature, the chassis overheating fan remains idle. When there is a change in the system temperature, the chassis overheating fan is automatically activated. When the operating temperature reaches a safe state, the chassis overheating fan turns off automatically. Using intelligent sensors, maximum thermal protection is provided without increasing the system noise level.