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 6 replies
  • Subscribers 32 subscribers
  • Views 979 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Will standard mcbs work on 12v AC?

hertzal123
The customer is using a 300va 12v tx to supply 5 no 60w takeaway heated food bags

and is having problems with the 5 no 10A ceramic fuse holders overheating on their spade terminals.

I wondered if B10 mcb,s would solve the problem,or would they be too slow to protect the tx on a short

cct on one output?

                         Regards,

                                    Hz
Parents
  • 0
    The issue is indeed one for conformity, and mcb's can be found that are stated as suitable for ELV. They are used in many applications.


    Also ignores the fact that mcb's also heat up to activate the thermal element.


    Whilst I'd agree that, if a 6 A mcb were used, they would offer closer protection, they would operate at a higher temperature than 10 A mcb's because of the thermal element.



    Does any of this explain why the fuse holders are overheating? It could well be that the fuse holders or fuses are subject to conducted heat from the transformer in close proximity operating at, or perhaps even slightly above, its ideal rating with real-world loads.


    Would a 500 VA transformer provide the solution?
Reply
  • 0
    The issue is indeed one for conformity, and mcb's can be found that are stated as suitable for ELV. They are used in many applications.


    Also ignores the fact that mcb's also heat up to activate the thermal element.


    Whilst I'd agree that, if a 6 A mcb were used, they would offer closer protection, they would operate at a higher temperature than 10 A mcb's because of the thermal element.



    Does any of this explain why the fuse holders are overheating? It could well be that the fuse holders or fuses are subject to conducted heat from the transformer in close proximity operating at, or perhaps even slightly above, its ideal rating with real-world loads.


    Would a 500 VA transformer provide the solution?
Children
No Data

Community Rules & Guidelines