{540} How to Protect Circuits From Reversed Voltage Polarity / DC Reverse Polarity Protection

How to protect circuits from reversed voltage polarity / DC Reverse Polarity Protection Part-2. #reverse #polarity #protection i explained that how does a reverse polarity protection circuit works and how to design a reverse polarity protection using a simple rectifier diode.
Part 1 of this video    • {539} How to Protect Circuits From Re...  
if a reverse polarity voltage enter in dc circuit, this diode will come forward bias, and it will cause to maximum current flow in hi & lo lines because the diode will become in forward bias condition, so the fuse will burn out
Reverse Polarity Protection Circuit Calculation
determine the load Current
multiply load current with 1.35 (to take 135% of the load current) the result value will the fuse rating
multiply fuse rating with 1.5 or 2 (to take 150% or 200% to take safe operating current of the diode). the resultant value will the diode current rating
multiply supply voltage with 2 or 3 for determination of diode reverse voltage value


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