Transcription of Overcurrent and Overcurrent Protective Devices - …
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Overcurrent and Overcurrent Protective Devices - …
Overcurrent and Overcurrent Protective DevicesFigure 3I =VOLTSTOTAL OHMSI = + + = amperesThe Figure 3 value of overload current may be up to about10 times the normal current value of example:Imagine working at a drill press. Suddenly, the drill becomeswedged in a steel of continuing to draw normal motor load current, thelocked drill motor shaft causes the motor to draw Locked RotorCurrent which is about six times the normal load may be serious unless the Overcurrent protectiondevice opens in time to prevent Multi-Purpose, dual element fuses, properly sized,provide excellent protection for similar term Overcurrent refers to abnormal current flow higher than the normal value of current flow in an electricalcircuit. Uncorrected Overcurrent can cause serious safetyhazards and costly damage to electrical equipment and most circuit breakers are installed in electrical circuits to open and stop the flow of Overcurrent .
Overcurrent and Overcurrent Protective Devices Figure 3 I = VOLTS TOTAL OHMS I = 480 0.01 + 10.0 + 0.01 I = 47.9 amperes The Figure 3 value of “overload” current may be up to about 10 times the normal current value of 47.9 amperes.
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