Assuming same length and gauge wire and decent crimps, it should be close imo?No , cause you can’t be sure how the current will split up.
You can’t be sure and hence you could subject the breaker to over it’s rated capabilityAssuming same length and gauge wire and decent crimps, it should be close imo?
It is polarized, as per the schematic that is printed on it. Which is why I want to wire it that way.Make sure the breaker is non-polarized.
I can wire it that way and put a test load on it and measure that the currents are approximately equal with an ampmeter.You can’t be sure and hence you could subject the breaker to over it’s rated capability
Batteries support bi-directional current flow.It is polarized, as per the schematic that is printed on it. Which is why I want to wire it that way.
Yes I agree but a catastrophic discharge current (short circuit on the load side) seems a lot more likely than a catastrophic charge current (other than maybe from lightning, which the PV circuit should be protected against)?Batteries support bi-directional current flow.
"Polarised DC circuit breakers use a small magnet to direct the arc away from the contacts and up into the arc shoot and arc disrupter cage. If the direction of current flow through the unit is reversed, then the magnet directs the arc away from the arc shoot and into the mechanism of the unit thus destroying it. This discussion paper details: (i) the common mistakes installers are making when wiring the polarised breakers; (ii) how the polarised breakers work and how they are wired correctly. The main difference between polarised and non-polarised breakers is that the polarised breakers will typically have a marking on them showing a ‘+’ and ‘–‘ symbol." -- http://greenforcesolar.com.au/wordp...of-Double-Pole-DC-Breakers-LVL2-131210-v2.pdf
I see your point.Yes I agree but a catastrophic discharge current (short circuit on the load side) seems a lot more likely than a catastrophic charge current (other than maybe from lightning, which the PV circuit should be protected against?
True and very good point.I see a second battery on your bench.
Are these two batteries to connected in parallel?
If yes and one of them has an internal short, the shorted battery will see big current in the wrong direction.
The other battery's OCPD will trip though.
A melted breaker is better than a venting battery.
To the best of my knowledge yes.True and very good point.
Are class T fuses non-polarized?
Although it could be argued that the directional breaker on the good battery would prevent its discharge into the shorted one...I see a second battery on your bench.
Are these two batteries to connected in parallel?
If yes and one of them has an internal short, the shorted battery will see big current in the wrong direction.
The other battery's OCPD should trip though.
A melted breaker is better than a venting battery.
Yes it could and I didAlthough it could be argued that the directional breaker on the good battery would prevent its discharge into the shorted one...
Non polarized dc breakers seem hard to come by.
Non polarized dc breakers seem hard to come by.
I live in Asia so most of the stuff we get is Chinese. Many DC MCB say "non polarized" yet they show + and - symbols on the schematic so what gives!?