Why 48v ups system can better match the power backup for cctv cameras scenario
Table of Contents
Why 48v ups system can better match the power backup for cctv cameras scenario?
48V UPS system refers to the commonly used UPS system with AC input and DC48V output. Most UPS on the market are UPS with AC input and AC output. This type of AC UPS is widely used in various fields, but it is not actually the most efficient solution in the field of power backup for CCTV cameras. Multiple AC-DC and DC-AC conversions greatly reduce the efficiency of the entire system. What is more troublesome is that AC UPS systems are relatively large. They are designed for the general market, while the power of power backup for CCTV cameras is relatively small. Therefore, whether from the perspective of efficiency or cost, choosing a 48V UPS system is more suitable for power backup for CCTV cameras than ordinary AC UPS solutions.
Comparison between 48V UPS System and AC UPS System
The above figure is a typical AC UPS architecture. We can see that the input is AC power and the output is also AC power. But if we look closely at its internal architecture, we can see that there is an inverter module. Because batteries are all DC voltage, when AC UPS charges the battery, it needs to convert the AC voltage at the input end into DC voltage to charge the battery. When the battery is discharged, the DC power needs to be converted into AC voltage, so there is an inverter module. We can see that it performs multiple AC to DC and DC to AC conversions internally. And this conversion usually loses efficiency. Because there are multiple conversions internally, AC UPS is usually larger than 48V UPS system or DC UPS system.
The above figure is a typical 48V UPS system or DC UPS system architecture. We will find that compared with the AC UPS system, its typical architecture is greatly simplified. And there is only one AC to DC conversion inside. It can be imagined that this greatly increases the efficiency of power consumption, and its volume is much smaller than AC UPS at the same power.
AC and DC System Comparison of Power Backup for CCTV Cameras
As shown in the figure above, this is a system built based on AC for power backup for CCTV cameras. Because we use AC UPS, we have to use AC input type when we choose POE switch. When we analyze the switches on the market, we find that AC input switches are usually larger than DC input switches. The main reason is that there is also an AC to DC power system inside the switch. Because the core modules inside the switch actually use DC voltage, especially the POE function requires DC48V voltage. Then we observe this system comprehensively and find that from AC UPS input to the final power supply to the POE module of the POE Switch, it actually undergoes three AC to DC conversions. We know that after multiple conversions, the efficiency loss is very large. In addition, it also creates more heat, which brings more pressure to heat dissipation.
In summary, we will find that using an AC system to build power backup for CCTV cameras will bring many disadvantages.
The above picture is a DC system built on the basis of 48V UPS System. Let’s analyze the benefits of using it to provide power backup for CCTV cameras. First of all, we found that its overall topology is very simple. The entire system has only one AC to DC conversion. It can be imagined that its efficiency loss is much smaller than that of the AC system. There is no AC to DC voltage conversion in the switch, so the switch system will be much smaller than the switch with AC input.
Overall, the power backup for CCTV cameras built by 48V UPS System is more efficient and smaller in size.
Summary of the Comparison
After the above analysis, we can find the following conclusions:
Efficiency
The efficiency of 48V UPS system for power backup for CCTV cameras is much higher than that of AC UPS system. The main reason is its simple architecture and few AC to DC and DC to AC conversion.
Volume
The overall volume of power backup for CCTV cameras built by 48V UPS system is much smaller than that of AC UPS system. Not only the UPS itself, but also the size of POE switch also makes a difference. CCTV cameras are often deployed outdoors, and the volume and weight greatly affect the transportation cost, installation cost and other expenses.
Heat dissipation
The heat dissipation of power backup for CCTV cameras built by AC UPS system is significantly greater than that of 48V UPS system. This is mainly because a large part of the energy lost in multiple AC to DC and DC to AC conversions is converted into heat. Because CCTV cameras are deployed outdoors, the increase in heat inevitably brings increased heat dissipation pressure, and additional configurations have to be added, which affects the cost of the entire project.
Factors of Selection of Products Available in the Market
Although the 48V UPS system is more efficient, in fact, customers’ choices are often limited by the products available on the market. Because basically the products available are 1KVA 2KVA 3KVA 19 inch rack type UPS. It is difficult to find products that meet the power requirements of power backup for CCTV cameras. Therefore, they have to choose a 1KVA level AC UPS, which makes the CCTV outdoor cabinet very large, and the costs of procurement, transportation, installation, and debugging have to increase due to the compromise of UPS procurement. Edgeware has designed a 48V UPS system specifically for power backup for CCTV cameras to minimize the entire system to the greatest extent, improve efficiency and reduce costs.
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