AC/DC Surge Protection Device Wiring examples, How to interpret the SPD Clamping Voltage Uc
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- Опубліковано 8 лип 2024
- Hi, in this video, I want to show wiring examples for AC and DC Surge Protection Devices within the normal electrical installation as well as in PV installations. What exactly is the SPD Clamping Voltage and what does the value on the module stand for.
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hello(from Italy).. you are very clear and very professional.. it is a pleasure to follow you Happy New year Roland
Thank you, and happy New Year!
Roland, I sent you € 30.00 Euro ($ 50.00 AUD). I have only jumped through the video to check it out. I like what I see. I will have to watch the video all the way through later today when I have spare time. Thanks for uploading this thoroughly explained video tutorial guide.
Thanks Matthew. If I have missed something just tell me ;)
Roland. Wow. You have catered for all types of installation scenarios. Clear legible schematic diagrams and examples of real world wiring. Excellent tutorial explanation. Thank you very much for helping us with your knowledge.
Thanks mate for being an active advisor and supporter. It helps me too when I am getting inputs from my followers about what they want to see on my channel.
I have on my inverter AC input site with 80A digital Energy meter + 40A MCB + 40A Voltage and current protector. I plan to add an AC type 2 SPD after the meter in my next upgrade.
Another interesting Video Roland. Happy New Year also
Happy New Year to you too
Roland, another video idea (not that I need it now) is related to "Low Voltage Disconnect" devices on inverter AC output side. Why it is better than disconnecting battery bank from inverter. How to assemble components that does not require soldering or programming. I presume it is a common issue with people that are still using Lead Acid setups and not using a BMS LiFePO4 setup.
I see. This is probably an issue with simpler off-grid setups where inverters only have a low voltage disconnect. I guess I have to order one of those voltage relays and show such a setup with an SSR. Btw, thanks for the donation :)
Happy New year Roland
Happy new Year to you and your family
Roland, because the Peak Voltage is approx 325VAC for a 230VAC RMS system, should we instead be using a SPD that has a minimum Uc rating of 325V (the closest SPD Uc rating is 385V)?
The SPD I purchased is the same as yours, a GEYA GSP9-C40 T1 and T2 combo with a Uc rating of 275V. I was led to believe the Uc needs to be a close as possible to the RMS Voltage, which in our case is 230VAC. Did I get the wrong SPD rating (which has Uc 275V)? Should I instead be using a SPD with a Uc rating of 385V (there does not seem to exist a SPD that has a Uc rating of 325V)?
No. 275V Uc is as well RMS. It will start conducting at around 360V and hold 460V. I now have the 275V ones installed everywhere in my system. none of them is leaking to ground at 240V
@@RolandW_DIYEnergyandMore Good. The only advantage I can think of for bumping to a higher Uc voltage rating is to extend the life of the SPD itself. To be on the safe side, I will have spare Uc 275V SPDs handy to install for when they age and need replacing.
Hi Roland. Could explain when would someone choose a 3 pole DC SPD over a 2 pole. Thank you!
Hi. A 3-pole DC? I would not see any application for such a device in a PV=systems as even if someone has lets say 2 MPPT strings, would still have separated +/- circuits and wouldn't have lets say a common -.
The industry is selling a lot of weird things. It doesn't mean that someone is buying and using such a device.
Thanks Roland for your help. Here's an example prosurge PVB12.5/200-V-CD(S) is 3 pole whereas their other model PVB12.5/200-V-C(-S) is a 2 pole. I am trying to protect a pv system that has an open maximum voltage of 215V and an operating voltage of 167V. The only difference seems to be the Up rating.
@@mattbixby51 what I see this aren't really 3 poles. It has a plus, minus and ground terminal as every other DC SPD but 3 cartridges. The SPD is a T1/T2 combination SPD so those cartridges might be required to cover for the different Type requirements. One would just need to know the exact build of those SPDs.
Alright. Then I will probably use the 2 cartridge type then. Many thanks.
Roland and Tobi, I know very well that I will be forced to change battery chemistries when my current AGM Lead Acid banks retire. The AGM Lead Acid market is getting smaller. My local distributor and largest retailer of the AGM Lead Acid has also validated my suspicion that the AGM type is too much hassle to have laying around waiting for buyers. Australia's largest retailer has already said to me that they are no longer ordering AGM batteries to have in stock, and that the plan is to only make them available as a "special order" from China.
Whether I like it or not, I will be forced to eventually adopt LiFePO4 cells or batteries in a few years.
Here in Thailand any Lead Acid battery solution would already be significantly more expensive then the finished LFP packs which you can buy from China (directly or even via local distributor). And they do not have any advantages, right?
But in a few years maybe something different will show up anyways. I will have to replace my 2nd hand cells in the powerwall too. I planning to do that probably 2025. Maybe its going to be sodium ion. Who knows :)