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Article | REF: D5185 V1

Static uninterruptible power supplies (UPS)

Author: Henri MABBOUX

Publication date: August 10, 2001

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4. UPS and power supply compatibility

4.1 General approach

The definition of the UPS must take into account the nature and characteristics of the power supply.

  • Type of food :

    • low-voltage supply from the public grid ;

    • supplied by a MV/LV transformer ;

    • presence of an alternative source: combustion engine and alternator.

  • Power supply characteristics :

    • network topology (single-phase, three-phase with neutral, three-phase without neutral) ;

    • nominal voltage and frequency ;

    • variation...

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