April 5, 20179 yr 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?
April 5, 20179 yr 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.
April 5, 20179 yr 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
April 6, 20179 yr 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
April 6, 20179 yr 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
April 6, 20179 yr 26 minutes ago, pilotfish said: @BowsieThey do. Din_Changeover_Onesto.pdf Great thanks
April 9, 20179 yr 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?
April 9, 20179 yr Did you order from China directly? Could you post the link? No just from a local supplier to see what it's like.
April 9, 20179 yr 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
April 9, 20179 yr 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
April 9, 20179 yr 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
April 10, 20179 yr 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
April 10, 20179 yr 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
April 10, 20179 yr Author Thanks all for the feedback and help. I found one at ACDC in Strand ( Cape Town ) They also have Fuse holders.
April 10, 20179 yr 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
February 5, 20188 yr hi, yeah for some reason Jaycar (NZ) have removed high current DC circuit breakers for their stores ?
February 6, 20188 yr 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 .
January 8, 20197 yr Can anyone explain the difference between a DC breaker and an AC breaker? I did not even know there is a DC breaker
January 8, 20197 yr 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.
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