Whether it is unit or outdoor performance, we should budget the system power in advance at the beginning of construction; Only if there is no problem with the circuit can the future performances be held normally; How to calculate the power consumption of a set of Shandong stage lighting and sound system? Let me show you.
1、 Why should we calculate the power consumption
The calculation of electric power is to estimate the power consumption of equipment to determine the capacity of power distribution; Only when determining the distribution capacity can we know what power lines are needed for each power line.
2、 Basic power distribution knowledge
The distribution capacity is based on the apparent power of unit kVA, and the electrical power of equipment is based on the active power of unit kw. A power factor is required for conversion. The power factor is generally 0.9, which is in line with the current system and technology.
3、 Estimate the power consumption according to the three systems of audio, light and video
1. Audio system
Estimated electric power=power amplifier power+audio processing peripheral equipment power
The equipment power mentioned above is the nominal rated power of the equipment, which can be found directly on the equipment nameplate or manual, that is, the average electrical power of the equipment when it works stably for a long time; Pay special attention to the fact that the power of the speaker and the power of the timing power supply are not considered in the estimation, and the power of the power amplifier is not multiplied by a factor of 1.5. If it is an active speaker, the power of the power amplifier in the above formula can be replaced by the power of the active speaker.
2. Lighting system
The estimated electric power 1=demand coefficient x power of the direct or dimming cabinet. The demand coefficient varies according to the complexity of the system and the process characteristics. Generally, the value is 0.5 to 0.8 for a simple system without dimming.
The estimated electric power 2=the sum of lamp power. The power of lamps in the lighting system accounts for a large proportion, and the power of dimmers, network node equipment, etc. can be ignored.
3. Video system
Video is generally the power of projectors and several large LED screens. The power of projectors depends directly on the rated power. The rated power of large LED screens is the power measured when the screen is at brightness and white screen brightness; The power of the large screen is how many kilowatts per square meter, and the power consumption is calculated according to the total area of the large screen.
The above is the whole content of "How to calculate the power consumption of stage lighting and sound". For more articles about lighting and sound technology, please pay attention to this site. If you need sound system design and sound construction solutions, please contact us https://www.wenguangzhineng.com Come on!