Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 8 replies
  • Subscribers 32 subscribers
  • Views 1518 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

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. 

Parents
  • 0

    You don't say much about the DC supplies PS-1 and PS-2 themselves.

    The diodes would definitely be required in some circumstances, e.g. mid-point earthed systems.

  • 0 in reply to gkenyon

    Hi, The 110VDC supply's are coming from two different Battery chargers. So here two different 110VDC supply connected in parallel to form the redundancy & further feeding to common DC load. 

  • 0 in reply to Rohit Sharma

    How is the battery (or DC system) earthed? Positive, negative, mid-point, or unearthed?

    If the battery is mid-point earthed, then the diodes will be required as per a mid-point earthed source.

    It would be unusual for a secondary battery installation to be floating unless it's used with an inverter system? If it's used with an inverter system, then that is the reason for the diodes, as the DC system will "pivot" around supply neutral.

Reply
  • 0 in reply to Rohit Sharma

    How is the battery (or DC system) earthed? Positive, negative, mid-point, or unearthed?

    If the battery is mid-point earthed, then the diodes will be required as per a mid-point earthed source.

    It would be unusual for a secondary battery installation to be floating unless it's used with an inverter system? If it's used with an inverter system, then that is the reason for the diodes, as the DC system will "pivot" around supply neutral.

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines