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The difference between modular UPS and conventional UPS

Feb 26, 2021

The difference between modular UPS and conventional UPS

Modular UPS can use shorter power connection cables for installation, use and maintenance. By reducing the point of failure between critical equipment and the load, modular UPS can increase the availability of the entire system.


   In terms of design and working principles, modular UPS includes rectifiers, inverters, and some also include static bypass switches, auxiliary control circuits, and CPU main control boards. The biggest advantage of modularization is that it can improve the reliability and availability of the system. The failure of any module will not affect the normal operation of other modules, and the hot-swappable feature can shorten the installation and repair time of the system.


   In addition, modular UPS can bring better scalability to users, which also plays a very good role in protecting users' investment.


   Just as the container starts loading at the factory, the installation and commissioning of the rack-mounted modular UPS also starts at the factory. The UPS based on standardized modules can formulate unified standards in the product design, production and manufacturing process, so that all components in the entire system can play the best performance, and at the same time, it can avoid compatibility problems. System failure.


   Rack-mounted modular UPS can be configured according to current business needs, and more modules can be added in the future. The optimization capabilities of this system significantly reduce the total cost of ownership.


   Modular design provides great flexibility in reconfiguring power to meet changing business needs. When installing, upgrading, reconfiguring or moving modular systems, independent components, standard interfaces, and simple operation save time and money.


  The power supply system realizes on-demand


   Rack-mounted modular UPS has considerable advantages compared with traditional UPS. Its advantages are mainly in the following three aspects:


   Simple installation, convenient expansion, saving investment.


   Rack-mounted modular UPS enables the power supply system to respond on demand, allowing the capacity to achieve "dynamic growth" with the development of the business. It not only satisfies the needs of later business expansion, but also reduces the initial purchase cost of users.


   Parallel redundancy, stable operation and high reliability.


  In the rack-mounted modular UPS, the power module part is redundant in parallel, and each module is equipped with input and output insurance and input and output relays. Any failure of any module will not affect the operation of the entire system.


  In traditional UPS products, users generally adopt the "1+1" or "N+1" parallel redundancy mode to ensure safety, which can only be fault-tolerant once. In the rack-mounted modular UPS system, users only need to purchase the corresponding power modules to achieve "N+X" failure redundancy. "Modular redundant parallel structure" is more reliable than traditional UPS.


   Easy maintenance, online disposal, high availability.


  Traditional UPS requires professional and technical personnel to repair on site. All modules of modular UPS are allowed to be hot-swappable. Users can intervene in maintenance and directly replace UPS spare modules online.


Rack-mounted modular UPS inherits the achievements of traditional UPS technology development 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 swap of system modules, but also better The relationship between independent operation, mutual cooperation and smooth conversion of system modules is handled.


   Rack-mounted modular UPS currently has two representative structures.


   One type is power modular UPS. The modular power rack UPS consists of a rack plus a power module. The power module includes the rectification, filtering, charging, inverter and other parts of the traditional UPS. But the static bypass shares the same rack with part of the system's monitoring and display. Each module is independently controlled and operated in parallel, and the display control module on the upper part of the cabinet is only used as a user switch UPS host and a networked monitoring platform.


  The other category is fully modular UPS. This type of rack-mounted modular UPS is composed of racks and single modules. Each single module is equipped with the entire UPS power supply and control circuit, including rectifier, inverter, static bypass switch and auxiliary control circuit, CPU main control board. Each UPS module has an independent management system.


As far as the current level of power electronic technology and component development is concerned, the two types of structures have their own advantages, and both have excellent representative products. Both can provide advanced decentralized parallel technology, so that the UPS system is not subject to centralized control technology. In order to avoid bottleneck failure, it provides modular parallel system with N+X parallel redundancy function.