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Diodes connected to 110VDC Positive & negative supply.... two 110vDC power supply's are connected in parallel.

Rohit Sharma

Dear Team,

We have two power supply's 110VDC connected in parallel to each other. Power diodes are being used in both 110VDC power supply's. I can understand the use of diode in Positive supply, it can block the reverse current flow in other power source if one of Power supply voltage get drop or failed. But what is the sue of diode in negative supply of 110vdc. Pl refer the attached screen shot & share your valuable comments. 

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    Even in "-ve earth" systems there might be a good reason for doubling up on the diodes - e.g. if you want the system to remain safe if one diode fails short-circuit. Of course you could just have two in series on the +ve line for the same effect, but one on each line may be simpler from a physical layout point of view.

       - Andy.

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    Even in "-ve earth" systems there might be a good reason for doubling up on the diodes - e.g. if you want the system to remain safe if one diode fails short-circuit. Of course you could just have two in series on the +ve line for the same effect, but one on each line may be simpler from a physical layout point of view.

       - Andy.

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