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Parallel & N+1 Redundancy Sizer

How many sets in parallel for the load, what each carries, and what still runs with one set down.

Inputs

Inputs and assumptions

Result

Capacity still available with one set down
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Load per set during normal operation
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Loading per set
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Sets to install
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What to check

  • Switchgear and paralleling controls capability
  • Whether load sharing and load shed can hold after a module trips

Related calculators

Screening-grade sizing. Manufacturer load-acceptance curves, ISO 8528-5 transient limits, and the adopted electrical code edition govern the final selection; an engineer signs off before hardware is ordered.

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