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Overcurrent Protection and Devices, Short-Circuit Calculations ...

Overcurrent Protection and Devices, Short-Circuit Calculations ...

Electrical Plan Review

Electrical Plan Review Short-Circuit Calculations - Worksheet (5) LPB Short-Circuit Current at beginning of run (MDP with voltage variance) = ________________ Find: “f” factor f = Find: Multiplier - “M” M = Calculate: Short-Circuit Current (SCA) SCA with voltage variance = Motor Contribution = SCA with voltage variance and motor contribution = (6) AC-1 Short-Circuit Current at beginning of run (MDP with voltage variance) = ________________ Find: “f” factor f = Find: Multiplier - “M” M = Calculate: Short-Circuit Current (SCA) SCA with voltage variance = Motor Contribution = SCA with voltage variance and motor contribution = (7) AC-2 Short-Circuit Current at beginning of run (MDP with voltage variance) = ________________ Find: “f” factor f = Find: Multiplier - “M” M = Calculate: Short-Circuit Current (SCA) SCA with voltage variance = Motor Contribution = SCA with voltage variance and motor contribution = 13

Electrical Plan Review Short-Circuit Calculations - Worksheet (8) EMP Short-Circuit Current at beginning of run (MDP with voltage variance) = ________________ Find: “f” factor f = Find: Multiplier - “M” M = Calculate: Short-Circuit Current (SCA) SCA with voltage variance = Motor Contribution = SCA with voltage variance and motor contribution = (9) Fluorescent Fixture Short-Circuit Current at beginning of run (LPA with voltage variance) = ________________ Find: “f” factor f = Find: Multiplier - “M” M = Calculate: Short-Circuit Current (SCA) SCA with voltage variance = *Ignore motor contribution for this step (10) Combination Motor Controller Short-Circuit Current at beginning of run (LPC with voltage variance) = ________________ Find: “f” factor f = Find: Multiplier - “M” M = Calculate: Short-Circuit Current (SCA) SCA with voltage variance = Motor Contribution = SCA with voltage variance and motor contribution = 14

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