The power rating is the power of an appliance when it is working normally.
It is the rated voltage of the appliance multiplied by the rated current. If the actual power of the appliance is greater than the rated power, the appliance may be damaged; if the actual power is less than the rated power, the appliance may not operate.
In a DC circuit, the product of the rated voltage and rated current is the rated power of the appliance. It is written as: P amount = U amount × I amount.
The power rating of different devices
1, power supply
The power rating refers to the ambient temperature of -5 degrees to 50 degrees, the voltage range of 180V~264V, the power supply for a long period of time to stabilize the output power. Rated power is the power of the power supply is one of the most important criteria. Usually, the power of the power supply generally refers to the rated output power of the power supply, in the nameplate of the power supply, the labeled power should be the rated power.
2, amplifier
For amplifiers, the rated power generally refers to the continuous output of the effective value (RMS) power rated power; refers to the efficacy of the power in the absence of distortion, continuous operation for more than 8 hours without damage. This power nominal has practical use.