Browse Definitions :
Definition

N+1 UPS

N+1, also called parallel redundancy, is a safeguard to ensure that an uninterruptible power supply (UPS) system is always available. N+1 stands for the number of UPS modules that are required to handle an adequate supply of power for essential connected systems, plus one more. 

If an enterprise data center uses a single large UPS, and that module fails, systems will be disrupted. In an N+1 scheme, multiple small UPS modules and batteries are integrated together. During normal operations, the load is shared equally across all modules, which behave as if they were a single large UPS device. If a single module fails or needs to be taken offline for service, the UPS system will still be able to provide an adequate supply of power because it's already been configured with one extra module.  

When N+1 is used for redundancy, the UPS modules should be sized so that the total anticipated load can be carried by three modules. The benefits of N+1 diminish after that point.

Learn more:

SearchDataCenter.in has Five tips for N+1 uninterruptible power supply (UPS) design

Bob McFarlane explains How to choose the right uninterruptible power supply for your data center.

Liebert Corp. has a UPS management checklist.

This was last updated in June 2010
SearchNetworking
  • network security

    Network security encompasses all the steps taken to protect the integrity of a computer network and the data within it.

  • cloud-native network function (CNF)

    A cloud-native network function (CNF) is a service that performs network duties in software, as opposed to purpose-built hardware.

  • Wi-Fi 6E

    Wi-Fi 6E is one variant of the 802.11ax standard.

SearchSecurity
  • incident response

    Incident response is an organized approach to addressing and managing the aftermath of a security breach or cyberattack, also ...

  • MICR (magnetic ink character recognition)

    MICR (magnetic ink character recognition) is a technology invented in the 1950s that's used to verify the legitimacy or ...

  • What is cybersecurity?

    Cybersecurity is the protection of internet-connected systems such as hardware, software and data from cyberthreats.

SearchCIO
  • privacy compliance

    Privacy compliance is a company's accordance with established personal information protection guidelines, specifications or ...

  • contingent workforce

    A contingent workforce is a labor pool whose members are hired by an organization on an on-demand basis.

  • product development (new product development -- NPD)

    Product development, also called new product management, is a series of steps that includes the conceptualization, design, ...

SearchHRSoftware
  • talent acquisition

    Talent acquisition is the strategic process employers use to analyze their long-term talent needs in the context of business ...

  • employee retention

    Employee retention is the organizational goal of keeping productive and talented workers and reducing turnover by fostering a ...

  • hybrid work model

    A hybrid work model is a workforce structure that includes employees who work remotely and those who work on site, in a company's...

SearchCustomerExperience
  • digital marketing

    Digital marketing is a general term for any effort by a company to connect with customers through electronic technology.

  • hockey stick growth

    Hockey stick growth is a growth pattern in a line chart that shows a sudden and extremely rapid growth after a long period of ...

  • Salesforce Trailhead

    Salesforce Trailhead is a series of online tutorials that coach beginner and intermediate developers who need to learn how to ...

Close