MileHighGuy
10 mW
- Joined
- Nov 21, 2017
- Messages
- 21
Sorry if this is redundant. I can't seem to find any of these on the web. Can anyone point me in the right direction please? Thnx
MileHighGuy said:Sorry if this is redundant. I can't seem to find any of these on the web. Can anyone point me in the right direction please? Thnx
Do not use the DZ47-63 breakers listed there. Two major problems:Buk___ said:MileHighGuy said:Sorry if this is redundant. I can't seem to find any of these on the web. Can anyone point me in the right direction please? Thnx
These guys seem to cover most eventualities.
teklektik said:Do not use these breakers. Two major problems:
- They are exclusively meant for residential AC use and have no derated specs for DC at all
- They are recommended only "for infrequent use" by the manufacturer
To discourage you, please see: http://donar.messe.de/exhibitor/hannovermesse/2017/U593078/breaker-eng-350150.pdf
...
depending which specs you work to.250/400VAC and 10KA IEC898(0.5~63A) or 15KA IEC947-2(0.5~63A)
Max.48V(XYDB7...,10KA)single pole; Max.250V(XYDB7-DC,6KA)single pole
(circa. on/off once a day for 27 years) andMechanical Life: Not less of 20000 times switching operation
a trip a day for 22 years.Electrical Life: Not less of 8000 times switching operation
Buk___ said:...
But ... it then goes on to give its DC ratings:Max.48V(XYDB7...,10KA)single pole; Max.250V(XYDB7-DC,6KA)single pole
...
As for "for infrequent use", a little down the same page gives: "Mechanical Life: Not less of 20000 times switching operation" (circa. on/off once a day for 27 years) and "Electrical Life: Not less of 8000 times switching operation" a trip a day for 22 years.
Honghua Electric said:It mainly functions as overload and short-circuit protection in the line of single-pole of 240V and two-, three-, four-pole of 415V with rated frequency of 50HZ or 60HZ, also for unfrequent making and breaking electrical apparatus and lighting circuit under normal conditional.
Buk___ said:So, assuming that the seller I came across is totally incompetent because "they look like domestic AC breakers, so are no good for DC" is premature.
teklektik said:Your quote "they look like domestic AC breakers, so are no good for DC" is a entirely fabricated.
- I simply did not say that. This imagined quote suggests that the evaluation was based on appearance and the conclusion of fitness for DC use derived from that "look". The document claims they are AC breakers useful for lighting and motor use. Although referring to them as 'residential' was perhaps incorrect, the DC evaluation was based entirely on the specification. Your attempt to characterize the conclusion otherwise is silly.
teklektik said:I did not mention the vendor directly or indirectly in any manner - the characterization of "totally incompetent" is entirely yours.
- I spoke only of required criteria, the fitness of the part, and provided the documentation for review to support the observations. You may agree or disagree - so present another perspective. How this went from a discussion of technical requirements and features to personal judgements is beyond me.
teklektik said:Lighten up ...Perhaps in this thread you made a suboptimal recommendation....
When you put something in quotes it's called "quoting" not paraphrasing... :lol:Buk___ said:It is called paraphrasing. In this case, used to draw the obvious conclusion from a large body of material evidence. And I did not characterise "the conclusion", but rather drew my own; which I'll characterise as I see fit.
Buk___ said:Had you read the document you cited; not called them residential; not mistakenly suggested that every product on the page I linked was not up to the job; had you cited the previous E-S discussion you've only mentioned in passing; we wouldn't be continuing this side discussion.
teklektik said:Normally I'd leave you throwing your troll tantrum, but you *finally* got out one sentence that is interesting:
cheeko said:Yes Fuse sounds much better, can those 12v Car ones take 100v?