| Electronics > Power/Renewable Energy/EV's |
| Limit 400V three phase current |
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| DefinitivVair0:
The 8kW heater was picked because it was the rated power of the heat pump (idk if its the right word in english). But it is basically only used to prevent the underfloor heating from freezing in case of a power outage or heat pump failure. So less wattage would also work. So basically I will buy another heater or maby disconnect one of the three heating filaments. But thanks for the very helpful replies from everyone :D |
| Gregg:
--- Quote from: DefinitivVair0 on December 15, 2024, 07:48:37 pm ---The 8kW heater was picked because it was the rated power of the heat pump (idk if its the right word in english). But it is basically only used to prevent the underfloor heating from freezing in case of a power outage or heat pump failure. So less wattage would also work. So basically I will buy another heater or maby disconnect one of the three heating filaments. But thanks for the very helpful replies from everyone :D --- End quote --- Does the same generator also run a circulation pump? If so what are its power requirements? The reason I ask is that it would be fairly simple to use the generator's 230V 3 phase settings for the heating elements for much reduced power requirements, but it may not work well with the pump. (edit:) Disconnecting one of the heating elements will lead to major phase imbalance in the generator. |
| DefinitivVair0:
The generator itself does not run a circulation pump. Also, I believe the 230V is single phase. But wouldn't it theoretically be possible to use a 3-phase transformer to step down the 400V to something like 200V but now with higher amperage? (Should result in about 31A) But on the other hand, a lower power heater is probably cheaper and easier to work with than a giant 3-phase transformer |
| themadhippy:
--- Quote ---Also, I believe the 230V is single phase. But wouldn't it theoretically be possible to use a 3-phase transformer to step down the 400V to something like 20pV but now with higher amperage? (Should result in about 31A) --- End quote --- wont do any good as youve still only got 7kva available from the generator , |
| Gregg:
I just assumed from the limited specs of the link provided that the generator might be 400/230V 3ph switchable. It depends on how the thing is wound; you would know better than me as you can look at it. If the heating elements have separate connections, you could connect two of the elements in parallel and power them with the 230V single phase. A real nightmare to change over from mains 3ph when needed. Isn't the water you are heating treated and have anti-freeze for use in an area where freezing is expected? |
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