Modular (UPS) uninterruptible power supply belongs to a kind of uninterruptible power supply system. Like traditional uninterruptible power supply, it provides power for load equipment when the city power is interrupted. So what is the difference between modular (UPS) uninterruptible power supply and traditional (UPS) uninterruptible power supply?

1. The external structure is different:

The modular (UPS) uninterruptible power supply is different from the traditional (UPS) uninterruptible power supply in external structure. It can install all modules in a standard cabinet, saving floor space and space, and is easy to install, use and maintain. From the design principle, the modular (UPS) uninterruptible power supply itself is a (UPS) uninterruptible power supply, including rectifier, static bypass switch and attached control circuit.

2. The difference in system availability:

In traditional (UPS) uninterruptible power supply products, there has always been a problem that a single (UPS) uninterruptible power supply is prone to single point failure. The only safety guarantee measure for users is to adopt the old safety precautions of "1+1" or "N+1". This measure not only causes a large economic waste, but also has a fault tolerance rate of only once. After a traditional (UPS) uninterruptible power supply fails, it takes a long time to repair and it is very difficult.

All power modules in the modular (UPS) uninterruptible power supply system array bear the system load evenly, and each parallel module is an intelligent independent individual with built-in redundancy, and there is no need for the system controller to centrally control the parallel series. After any module fails (including the system control module), its redundant design will be fully utilized to fully guarantee the normal operation of the equipment and achieve the maximum degree of fault redundancy. At the same time, users can also choose redundancy with more than one fault tolerance rate as needed. The availability of N+X modular array machines is higher than that of 1+1 single machine parallel machines, and the repair time after a failure is short.

Therefore, the modular and hot-swappable design of the (UPS) uninterruptible power supply structure is one of the important new technical signs of the availability and maintainability of the (UPS) uninterruptible power supply system.

3. Differences in capacity expansion:

Module (UPS) uninterruptible power supply creates conditions for the construction of power supply system and the increase of IT equipment racks simultaneously, so that the power capacity of power supply system equipment is always kept in an appropriate proportion with the actual load of the IT equipment in operation, especially when the system design needs to be modified, or even the project fails to start or the site needs to be relocated, it can be changed or exited economically and flexibly.

When the traditional (UPS) uninterruptible power supply system that has been running is modified for capacity expansion, it is difficult to ensure that it does not require short-term shutdown operation, or it is easy to induce unexpected system failure and downtime when the modification operation is carried out during system operation.

4. Differences in bypass settings:

For (UPS) uninterruptible power supply redundant system, there are two basic structures in bypass setting: one is that each single machine or unit has a bypass, and the other is that the system uniformly sets a large bypass. In the redundant system composed of traditional single-machine (UPS) uninterruptible power supply, the single machine is large in size, but the static switch is configured according to the capacity of the single machine, and is located close to the power board. Once a fault occurs (such as IGBT burnout), it may affect the work of the static switch.

Furthermore, the separation of bypass makes bypass control complicated, the number of boards increases, and the reliability decreases. Therefore, the reliability of the redundant system composed of a single machine with bypass is reduced, which is one of the reasons why the number of traditional parallel machines should not be too large.

The static switch capacity of the modular (UPS) uninterruptible power supply is configured according to the capacity of the whole machine. It is structurally separated from the power working part, and its action control is also independent, avoiding the risks caused by the separate switching of the traditional parallel system, and perfectly interpreting the parallel redundant design concept of "separate and integrated, no mutual involvement". The "close first and then open" action mode it adopts makes the system switching realize zero conversion in the true sense.

5. Difference in installation site:

The traditional (UPS) uninterruptible power supply is large in size and low in efficiency. It is generally installed separately from the power-consuming equipment, especially information equipment such as servers. The long distance makes it easy to make the zero-ground potential difference of the power-consuming equipment larger, thus affecting the normal operation of the equipment.

The modular (UPS) uninterruptible power supply adopts high-frequency technology, has a small size and high operating efficiency, and can be directly installed near the equipment, thus avoiding this problem.

Compared with the traditional (UPS) uninterruptible power supply, the modular (UPS) uninterruptible power supply has considerable advantages, mainly in the following three aspects:

1) Simple installation, convenient expansion, and investment saving:

The modular (UPS) uninterruptible power supply adopts a modular structure, which can be easily installed and expanded. You only need to add modules. In the early stage of the construction of the power supply system of the information room, the capacity demand of the (UPS) uninterruptible power supply will be wrongly estimated, too low or too high. The modular (UPS) uninterruptible power supply can effectively solve this problem through the expandable module structure.

2) Parallel redundancy, stable operation, and high reliability:

In the modular (UPS) uninterruptible power supply, the power module part is parallel redundant, that is, the power part is connected in parallel by many modules, which are not divided into master and slave, independent of each other, and share the load equally. Each module is equipped with input and output fuses and input and output relays. Even if one module fails, it can exit the entire system by itself without affecting the operation of the entire system.

In the modular (UPS) uninterruptible power supply system, users only need to purchase the corresponding power module to achieve "N+X" fault redundancy. Therefore, compared with the "N+1" mode of the traditional (UPS) uninterruptible power supply, the fault tolerance rate is greatly improved.

3) Convenient maintenance, online processing, and high availability:

In the event of a failure, the traditional (UPS) uninterruptible power supply requires professional technicians to repair on site. If a modular (UPS) uninterruptible power supply is used, because all modules are hot-swappable, professional technicians are not required. As long as there is a spare module, the user can also perform maintenance by himself. If there is a fault, the faulty module can be unplugged and replaced with a spare module. The whole process only takes a few minutes. The rack-mounted modular (UPS) uninterruptible power supply inherits the achievements of the development of traditional (UPS) uninterruptible power supply technology in terms of power device technology and manufacturing process, but in terms of system architecture, based on multi-module parallel connection, it not only realizes the hot-swappable system module, but also better handles the relationship between independent operation, mutual cooperation and smooth conversion of system modules.