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What is the difference between the BA and UA controllers

  • The BA controller is used to create simple source changeover systems that switch from one source to another depending on the presence of voltage UN on the “Normal” source. It is generally used to manage two permanent sources and can control Compact NS, Compact NSX and Masterpact NT/NW circuit breakers and switch disconnectors
  • The UA controller is used to create a source changeover system integrating the following automatic functions:

    1- Transfer from one source to another depending on the presence of voltage UN on the “Normal” source

    2- Startup of an engine generator set

    3-shedding and reconnection of non-priority circuits

    4-transfer to the “Replacement” source if one of the phases on the “Normal” source fails.

    The UA controller can control Compact NS, Compact NSX and Masterpact NT/NW devices.

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