Generator coupling
Emergency generators

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D5180 V1 Article

Generator coupling


Emergency generators

Author : Bernard COLIN

Publication date: February 10, 1998, Review date: January 3, 2023 | Lire en français

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5. Generator coupling

The power demand of a plant, or the significant variation in that power, can make it necessary to set up several generators in parallel. This means that a number of gensets can be brought into production in line with the power demand, avoiding the risk of running a genset at too low a power level. A generator must not operate at less than 30% of its rated power for extended periods. A maximum consecutive duration of 30 minutes is normally accepted.

5.1 Coupling methods

To connect a generator to a network or another generator, the following conditions must be met:

  • voltage equality ;

  • equal frequencies ;

  • phase matching.

...

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