Looking for adjustable circuit breaker

[Per Hansson]

Does anyone know if adjustable circuit breakers exist?
When I'm troubleshooting a machine that breaks glass fuses it's much better to use a circuit breaker, as I might not have enough of that particular fuse for testing...
But filling my car with circuit breakers from 0.1 to 16Ah in class A to D does not feel like an economic choice, much better to but a bucket of fuses then

All I'm finding is motor protection breakers but they are not really suitable as they are designed to be extremely slow to respond to overloads.
There also exists current monitoring relays but these are usually quite complicated to setup and and are cost prohibitive compared to the bucket of fuses

[capwizard]

Re: Looking for adjustable circuit breaker

Circuit Breaker Blade Fuse 12V 24V Resettable 5-30A Marine Rally Automotive
http://www.ebay.co.uk/itm/Circuit-Br...-/321268071405

[Per Hansson]

Re: Looking for adjustable circuit breaker

That's not even adjustable.
Either something like this: http://seventransistorlabs.com/Fuse/
But I need both AC & DC plus atleast 230v minimum rating, preferably 400v

This is what it should look like, but this is for motor protection (too slow)

Source: http://www.ebay.com/itm/300786217747

[capwizard]

Re: Looking for adjustable circuit breaker

IGBT is your best choice. Change Gate Drive Current to (0.1 to 16A adjustable),.If works I would like to make one.

Link2 is for AC application. " I need both AC & DC"

http://electronics.stackexchange.com...bt-as-a-switch
http://electronics.stackexchange.com...tch-with-igbts

[keeney123]

Re: Looking for adjustable circuit breaker

I think if you ask these guys they will know if what you are looking for exist.


http://www.electriciantalk.com/f2/ad...reakers-20000/

[budm]

Re: Looking for adjustable circuit breaker

post #9 gave good answer, you need to know your load, if you load has high inrush then you will not want to install fast acting circuit breaker, you do not compensate by installing higher amp rating breaker, you install the one that can handle the high in rush so you will not get fault tripping.
http://electronicdesign.com/electrom...money-or-worse
https://cdn.badcaps-static.com/pdfs/...69de281114.pdf
http://www.schneider-electric.us/en/faqs/FA96714/

[jiroy]

Re: Looking for adjustable circuit breaker

I recommend Legrand brand for such issues . They have huge catalogues and references for adjustable circuit breakers . Yet , they are Super quality and expensive .

[Per Hansson]

Re: Looking for adjustable circuit breaker

I think you misunderstood my reason for wanting the adjustable fuse budm, it is only for troubleshooting in complex machines.
Glass fuses are available in more dimensions, current and speed ratings that I could buy hundreds but never have the right one on hand for the job.
Let alone that I might need a couple with the same rating before finding the fault.

I have found this Elko PRI-51 series current monitoring relays that are quite cheap which interest me, the lowest response of 0.5s is a bit disappointing though.

There also exist the Siemens 3UG4622-2AW30 which is digital and really nice, but looks like it's interrupt current is very low so it would need an external contactor.
But the price on it is the biggest problem...

[budm]

Re: Looking for adjustable circuit breaker

I think you misunderstood my reason for wanting the adjustable fuse budm, it is only for troubleshooting in complex machines.
Glass fuses are available in more dimensions, current and speed ratings that I could buy hundreds but never have the right one on hand for the job.
Let alone that I might need a couple with the same rating before finding the fault.

I have found this Elko PRI-51 series current monitoring relays that are quite cheap which interest me, the lowest response of 0.5s is a bit disappointing though.

There also exist the Siemens 3UG4622-2AW30 which is digital and really nice, but looks like it's interrupt current is very low so it would need an external contactor.
But the price on it is the biggest problem...

I know what you are trying to do, I am just pointing out about people using higher rating fuse or higher rating circuit breaker to take care of fault tripping due to inrush current.