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