Jacques1s Posted April 5, 2017 Posted April 5, 2017 My installation manual recommend a 60A DC circuit breaker between PV and MPPT. Where can I buy a true DC breaker as I understand this is not the same as a AC breaker? Quote
___ Posted April 5, 2017 Posted April 5, 2017 I'll tell you what I do. I don't have a breaker there. I have one of these fuse holder disconnects which doubles as a breaker. My PV current is max 8 amps (one string per mppt), the short circuit current (Imax) on the panels, so I certainly don't need a massive breaker for this. Quote
Bowsie Posted April 5, 2017 Posted April 5, 2017 I have some 63amp DC zjbeny's somewhere. I'm sure I could scratch up up for you. Otherwise some fuse holders and fuse links will work Quote
pilotfish Posted April 6, 2017 Posted April 6, 2017 MCE market a range of DC CB's via their Onesto range. You should be able to get at most electrical wholesaler. DC_CB_Onesto.pdf Quote
Mark Posted April 6, 2017 Posted April 6, 2017 Hi I have a similar one of these that I think I got @ Rubicon. Its sits near my inverter. I also have a PV cutoff switch (rotary) next to my pvcombiner box. Regards Mark Chris Hobson 1 Quote
Bowsie Posted April 6, 2017 Posted April 6, 2017 @pilotfish do you know if onesto do a DIN change over switch Quote
pilotfish Posted April 6, 2017 Posted April 6, 2017 @BowsieThey do. Din_Changeover_Onesto.pdf Dadd111 1 Quote
Bowsie Posted April 6, 2017 Posted April 6, 2017 26 minutes ago, pilotfish said: @BowsieThey do. Din_Changeover_Onesto.pdf Great thanks Quote
Bowsie Posted April 7, 2017 Posted April 7, 2017 I've ordered a onesto change over to testSent from my iPhone using Tapatalk Quote
ibiza Posted April 9, 2017 Posted April 9, 2017 On 4/7/2017 at 10:43 AM, Bowsie said: I've ordered a onesto change over to test Sent from my iPhone using Tapatalk Did you order from China directly? Could you post the link? Quote
Bowsie Posted April 9, 2017 Posted April 9, 2017 Did you order from China directly? Could you post the link? No just from a local supplier to see what it's like. Quote
ibiza Posted April 9, 2017 Posted April 9, 2017 8 minutes ago, Bowsie said: No just from a local supplier to see what it's like. Could you share the supplier? I couldn't find any local (except one which, I know, they have nothing) on Google Quote
pilotfish Posted April 9, 2017 Posted April 9, 2017 Contact the distributor MCE Electric and ask about supplier in your area; Joburg 011-683-0641 Pta 012-804-6005 DBN 031-569-4846 Cape Town - no luck, but you've still got the mountain Quote
ibiza Posted April 9, 2017 Posted April 9, 2017 Thanks @pilotfish Jo'burg branch is not far from me. I forgot on them, the other one was in my mind when I said they have nothing Quote
Mark Posted April 9, 2017 Posted April 9, 2017 Rubicon will have and they have national offices. Quote
Bowsie Posted April 10, 2017 Posted April 10, 2017 tnx @Mark @ibiza let me know if you win. I've ordered from a electrical supplier in Edenvale. Ferreras. Collecting today. Sent from my iPhone using Tapatalk Quote
ibiza Posted April 10, 2017 Posted April 10, 2017 3 minutes ago, Bowsie said: @ibiza let me know if you win. I've ordered from a electrical supplier in Edenvale. Ferreras. Collecting today. Sent from my iPhone using Tapatalk Quote
Jacques1s Posted April 10, 2017 Author Posted April 10, 2017 Thanks all for the feedback and help. I found one at ACDC in Strand ( Cape Town ) They also have Fuse holders. Quote
Bowsie Posted April 10, 2017 Posted April 10, 2017 Thanks all for the feedback and help. I found one at ACDC in Strand ( Cape Town ) They also have Fuse holders. I found the quality on the AC DC change over wanting. The terminals strip and buckleSent from my iPhone using Tapatalk Quote
kiore22 Posted February 5, 2018 Posted February 5, 2018 hi, yeah for some reason Jaycar (NZ) have removed high current DC circuit breakers for their stores ? Quote
Chris Hobson Posted February 6, 2018 Posted February 6, 2018 My partner in crime (Chris-R) is about to import good quality solar accessories (SPDs, DC disconnects, DC (and AC) breakers, fuses, MC4 connectors cabling etc). Watch this space . Quote
stoic Posted January 8, 2019 Posted January 8, 2019 Can anyone explain the difference between a DC breaker and an AC breaker? I did not even know there is a DC breaker Quote
phil.g00 Posted January 8, 2019 Posted January 8, 2019 1 hour ago, stoic said: the difference between a DC breaker and an AC breaker When current is flowing it wants to keep on flowing and if you break the circuit it will draw an arc, ionizing the air and maintaining the circuit. In a nutshell, if the electrical gap is big enough current will stop flowing. With AC however there are natural current zero points, so if the gap is sufficient the arc wont maintain itself and the circuit will be switched off. With DC there are no natural current zero points, so something else has to be done, to effectively increase the size of the gap or blow-out the arc. I think the most commonly method used at a small scale is to use magnetism to push the DC arc away from the opening contacts. Large breakers use all sorts of mechanisms and arcing mediums. stoic, Gabriel_2018 and Chris Hobson 2 1 Quote
Gabriel_2018 Posted January 8, 2019 Posted January 8, 2019 I LOVE this video: Corné, Dadd111 and Chris Hobson 3 Quote
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