There are usually two ways to draw power for security projects: centralized supply from the computer room or monitoring box, or drawing from a nearby power supply near the point. The difference between the two in terms of power outage duration, construction cost, and lightning protection difficulty is more obvious than imagined. If you choose the wrong one, you will have to pay back the debt in the rainy season of the next year.
Centralized power supply reduces costs in one place UPS
Centralized power supply puts the UPS, power distribution and lightning protection in the computer room or aggregation box. One configuration covers dozens of channels. The recording will not be interrupted even if the mains power is interrupted. It is suitable for areas such as perimeters and entrances that require continuous recording. The price is that the power has to travel farther along the network cable, and the voltage drop and line loss increase accordingly. It is necessary to control the length of a single segment and choose a network cable with a larger wire diameter. For the division of labor on the wiring side, please refer toCampus network and FTTH integrated cabling solution.
Collecting power nearby saves cables and provides more inspection points
- In mountainous areas or factory areas where the points are scattered and the cable distance is long, the nearby power supply construction can be done quickly and with low investment.
- Each power adapter is an independent failure point, and the probability of damage increases significantly during thunderstorms.
- Without a unified UPS, a sudden power outage may cause frame loss in a certain area, and video recording is often missing afterward.
- After installing surge protection and waterproof boxes point by point, the material cost is not much less than the centralized solution.
Mixed classification and acceptance three items
Actual projects are often broken down by region: the main areas are concentrated, and remote scattered points are nearby. When mixing, the points should be listed on the point table, indicating the boundary location, protective device and maintenance responsible party. It is recommended to test three items for acceptance: power receiving end voltage, port output power, and whether the power-off switching is successful, and write them into the completion documents. EB-LINK's suggestion for new projects is to plan the UPS capacity with a 30% margin. When installing cameras later, there is no need to touch the backbone. Similar experience can be found inOptical fiber project for vehicle monitoring system in highway tunnel in a provinceCompare inside.