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The advantages of the centralized power supply scheme are unified control and management of power supply schemes, reduction of the use of engineering cables, and the use of lines for beautification projects. However, please note that when using a centralized power supply scheme, ensure that the total capacity of the centralized power supply equipment is greater than the sum of the capacity of the downstream load services. At the same time, we must also consider that the wire diameter of the pre-stage cable should meet the current demand for all loads of the subsequent stage.
How to properly configure the camera power supply of the entire monitoring system?
A: This problem often makes young, inexperienced engineers have difficulties. Many programs find that the original design of the power supply capacity is not enough, and they need to add additional equipment, resulting in wrangling with Party A. In fact, because the camera starts at a momentary instant and the starting current is very large, coupled with the loss of long-distance transmission over the project, the power required by the surveillance camera is not simply the sum of the rated power of all cameras. The correct approach is to add the rated power of the camera of the entire surveillance system by 1.3 times. This is the actual power required by the camera, and then adds about 30% of the loss. Finally, plus 30% of the margin, as Expand capacity in the future.
for example:
If a business building has 100 fixed gun cameras and the rated power of each monitoring camera is 4W, how do we configure the camera's power supply?
According to the above calculation method, we calculated that the rated power of the camera is 4W*100 units=400W
The actual power used by the camera is 400W*1.3=520W
After considering the loss, the power required by the camera is 520W*1.3=676W
In addition to the power supply margin, the power required for the final configuration of the camera is 676W*1.3=878W.
Summarized as follows: The power source that the camera needs to configure = The power rating of the camera *1.3*1.3*1.3
(Note: If the monitoring distance is extremely long, it is necessary to increase the power supply and increase the power supply voltage.)
Surveillance camera power configuration, the most taboo?
A: The most taboo is: The entire monitoring system shares a power supply. The reason is as follows:
1) When the system is being repaired, it is often necessary to turn the power on and off. All cameras start at the same time when the power is turned on. The starting current is particularly large, and the impact on the power supply is great, and the power will be severely burned.
2) All surveillance cameras share a single power supply. When the power supply fails, the entire closed-circuit monitoring system is paralysed. In particular, the images of some important entrances and exits cannot be monitored and may cause unnecessary trouble.
What should be the correct approach? As in the above example, there are 100 fixed cameras in a business building, and a total of about 800 W of power is required. The correct configuration should be to select 4 sets of 200 W each. In this way, when a certain power supply fails, the cameras at the important entrances and exits can be connected to other good power supplies so as not to affect the work of the entire system.
What should you watch out for when choosing a surveillance camera?
A: First, when connecting the camera to the power supply in the centralized power supply scheme, do not connect the remotely located camera and the closely spaced surveillance camera to the same power supply. If connected to the same power supply, if the power supply voltage is high, the camera at a short distance will be burned, the power supply voltage will be low, and the camera at a relatively long distance will have no image. The cube camera adopts the wide power supply design and can work stably for a long time in the range of DC input voltage 12V-36V, completely eradicating the damage to the camera caused by unstable input voltage (such as surge, etc.). This problem can be well solved. It is the best solution for centralized power supply to the camera. Second: If the monitoring distance is too far, you need to configure a higher voltage power supply, such as 30V, 36V, etc., or even directly for 220V AC power, to the front and then change the pressure. 
Attention to centralized power supply of surveillance cameras
The centralized power supply mode refers to the way in which the source devices are centrally installed in the power room and the battery room, and the communication power is supplied to the communication devices after unified distribution and distribution.