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What is parallel-redundant(N+X)UPS system

What is parallel-redundant(N+X)UPS system

2022-04-15 13:44
  • First,UPS in parallel refers to when the outputs of two or more UPS are connected to supply the load via a common AC busbar.
  • ‘N+X’ configuration solutions are commonly used to protect mission-critical applications in data centers, industrial sites and larger business operations. The main principle behind a parallel-redundant UPS system is that it can continue to support the critical load should one or more UPS modules fail. Compared to N capacity installations, this means it can achieve higher availability and MTBF (mean time between failure). 
  • In addition, this also enables UPS maintenance to take place without interrupting the load. Modules can be powered down for servicing while the remaining UPS continue supporting the load. 
  • During normal operation, each UPS shares the load equally. Similarly, when the UPS system needs to run on batteries, each UPS will still share the load as each module has its own battery set, rather than a shared common battery. 
  • If any of the UPS modules in a parallel-redundant configuration fails or experiences an internal fault, it automatically disconnects from the output AC busbar, while the remaining active UPS continue sharing the load.

 

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