Reading a Solar Electrical Schematic
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- Опубліковано 5 жов 2024
- www.interplaylearning.com
www.interplaylearning.com/solar-energy-installer-training-program
Mark Mrohs displays how to Read a Solar Electrical Schematic on the Solar Training Program.
The Solar Training Program or STP provides a range of simulation-based training content which can improve your employee's performance across the Solar industry.
The Electrical Install Course includes a general overview of electrical concepts like tools and equipment, typical electrical components, wiring, conduit, and grounding. Then the learner engages with the simulation-based practice of locating and mounting equipment, routing and installing conduit, installing wiring, monitoring equipment installation, and labeling.
To learn more please reach out to us directly at sales@interplaylearning.com, or visit our website.
Thank so much dude for taking the time to create and share this amazing explanation video!
I would absolutely love to partner with inner play and discover what I need to do to set up a training program for installation design even sales
Excellent!
thank you for this video I want to ask where I can find the rest of the videos on this slide.
I love to see a schematic drawing with Soler panels, multiple DC car battery's and into the home breaker panel box and eliminate the power company meter on a 220V-240V home (European)
This particular system that you are showing doesn't make sense concerning the Utility disconnect side. If there is utility line work needed, the utility guy will come out and shut down your entire system by pulling the AC disconnect and now all the power that was coming from the invertor from solar is all gone. You now have no power coming from solar or from utilities because they just shut you down and shut down the grid power for maintenance.
I would change this design with a completely different approach. I want to continue to have my own power coming from solar and backup batteries. I would have the grid utility meter go to an AC DISCONNECT box that the UTLITY or HOMEOWNER can turn off and do a lockout\tagout procedure. This way, there is no power coming from the grid OR any power coming from the invertor as back-feed if solar is generating more power than consumed (and batteries are fully charged if you have that type of system).
In your explanation I do not see the cables coming from the power company, you mention that on the top side is coming power from the array. Also,said that even when we turn off the array the system still hot because the power coming from the power company. So, do you feed the electricity from the solar array and the utility company at the same time? kind of dangerous practice..
There is the ‘Main Service Panel’ on the lower right of the dwg. That is where all our solar stuff ‘ends’. That is also where the utility power ‘ends’ with its connection to the house. The actual two hot wires for Line1 and Line2 and the Neutral and the Ground wires are NOT shown explicitly in the drawing. It is all about the solar wiring. The ‘power company’ (utility) wires would come in this way. Two big power wires, L1 and L2, would land on the TOP of the ‘Main Breaker’ terminals shown inside the MSP. The utility neutral wire would land on the top of the long vertical ‘N’ bar (the neutral busbar); and there would be a GEC Grounding Electrode Conductor that would connect to the vertical ‘G’ bar (the ground busbar) and that would go to a local ground rod in the earth.
The idea is that any work inside the MSP should be done by an electrician and they would have turned OFF that Main Breaker first, so when putting in any solar circuit breaker or working on any wires inside that MSP there would be no power from the utility on the two skinny vertical lines coming down from the Main Breaker terminals. Even though the Main Breaker is off, and so everything coming DOWN from that point in the diagram would be zero volts, the utility power at 240 Volts would still be live and hot on the TOP part of that Main Breaker. This is always the case with breakers - one side can be switched off, but the other terminals that are connected to the source of power for the circuit are still there, still connected to their source. So anyone working just has to be aware of that. But typical safe working practices means you can safely work inside the MSP once the Main Breaker is switched OFF.
Hope that answers your question!
Do common grounding defer from DC AND AC OR INVERTER GROUNDING WILL LIKE TO KNOW
sorry if this sounds stupid but where is the battery
hello,what is suitable program to do such that simulation?
@TELEKIN but, i can get it
5:19 why you thinking that wires from SOLAR system NOT HOT too?? it is solar system and it produces energy....It is work to AC disconnects which not involved in the solar system I think so....
This lesson is looking at a static schematic drawing. It represents where each wire connects. It is not showing the flow of energy when it is actually ON and producing power. At around 5 minutes, I am talking about the wiring of the AC disconnect switch that is between the solar system components and the final utility connection inside the house electrical service panel. I am stressing that the location for the wires coming FROM the solar circuit breaker inside the service panel should land on the TOP terminals of that AC switch, as standard safe convention, so that when that switch is ever opened in real life, any electrician will know that those top wires are STILL potentially HOT, they are connected to the utility power which is always on (unless you have also turned off the solar breaker). So the discussion in this video is just all about how the wires should be landed to be conventional and safe.
The idea is that yes indeed the solar system can make power too (like the utility). But the wiring of the solar side is more clearly dictated by the equipment. There is only one place and way for the solar wires to land in the inverter, if you are not being dumb you will put those wires where they are labeled to go, and all will be safe there too. There is actually a DC disconnect switch inside the inverter - it is not shown in this picture, because all that detail is covered in other lessons. In this drawing, I just show the red and black from the solar array coming down from the roof Array Junction Box and landing inside the inverter, at the “+” and “-” points, those would be on the disconnect switch itself.
To go further with this, to clarify the safety aspect of this video and lesson, the issue being explained is what happens inside that AC disconnect switch under actual operating conditions, where there could be live HOT power. Well… if that switch is opened, to ‘shut off’ the solar system, the wires coming from that solar breaker inside the service panel would STAY HOT, they are connected to the utility. BUT, the wires coming also into that AC switch enclosure, from the solar system side, would GO DEAD. That is because the solar inverter always needs utility power to operate, and as soon as it detects a loss of utility power, for safety it will automatically and quickly (fraction of a second) turn OFF. So the black and red wires coming from the L1 and L2 outputs of the inverter , going all the way to that AC switch, would be DEAD/no power/safe.
I was just emphasizing that if the AC switch is wired properly, as shown in the drawing, an electrician would EXPECT the lower wires to be dead when the switch is opened. It’s just that that switch will open any circuit connected to its terminals, no matter if you put the wires on the top or bottom terminals - but if you were to incorrectly put the utility side of the circuit onto those bottom two terminals inside that switch, then when you switch it open, those bottom two terminals would STILL be HOT and that would be dangerous for any electrician that expected those to be dead.
Hope this explains it.
How do you synchronize solar system AC output with utility power?
That is the job of the inverter. It changes the solar pv DC current and voltage into 60 cycle AC current and voltage. And one of its critical functions when doing that is to synchronize with the utility. Most solar inverters are not ‘self-commutating’ meaning they do NOT set their own timing, but rather must follow the timing of the utility. Without the utility signal, they cannot operate.
--- more info ----
There are inverters that operate only from battery power, and those do set their own timing (‘self-commutating’). But those cannot be connected to utility power, because they aren’t intelligent enough to know how to synchronize.
And now there are solar pv inverters that work both with the utility and can operate from batteries on their own when the utility drops out. They are quite sophisticated to be able to do both. But they know how to synchronize their own AC signal with the utility signal.
@@InterplayLearning ok. I understand now. Thank you.
@@InterplayLearning very educational, I have a related question. I live n Barbados, we have 110V current at 50Hz. Most of our appliances come from the US so they are 110V, 60Hz. My Hybrid inverter can do 50/60Hz. If I understand correctly the appliances would work better at 60Hz as that is what they are designed for. My inverter matches the utility so it works at 50 Hz, is it possible to change that to 60, or does it need to match the frequency of the utility.
way to going
I'm sorry sir you cannot connect solar panel ground to battery to AC inverter ground to breaker box ground you cannot mix the DC ground on the AC ground . I don't know detaily why I cannot explain.
I connected suaoki inverter and it melted. Well Master controller and other engenner said same.
But I want to know detail if you know please ejucate me .I wants to know more detail.
Inverter ground goes negative side battery as con and AC ground goes breaker box AC ground. Inverter ground mixed with AC ground mixing at breaker box. At main breaker nutral & ground are connected you can not mix togather with inverter ground & AC ground. I want to know why if you know more detail please ejucate me please .
Please help me understand why
Well this doesn't have battery so it mght be different but inverter ground have to connect with negative side of battery.
Actually I think it's all defiffarent by inverter design some inverter doesn't have ground out I don't know why may be already connected to negative side of battery ?
Sam reason why you cant connect your cellphone directly to AC socket without the powersupply aka charger.
The flow of electrons in AC is different to DC.
AC has higher voltage than DC in that system 230v for AC and 24v for DC.
Any wiring coming out of the inverters away from the array for example to your meter or your AC disconnect or sub panels are all converted from DC to AC at the inverter. The only DC power from the system comes from the panels and ends at the inverter