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Household Electricity
General thermal key
9
hace 6 años
hace 6 años
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https://1drv.ms/u/s!As3Fzqy3VNp2iYstOlS9XGncPoEvNg" alt="" /> as follows, / I wanted to see it, By calculation I have a high degree of electrification with 9 circuits and with thermics of: 2 of 10 ampere and 7 of 16 ampere. My query is how I calculate the general thermal. Thank you!
17.232
hace 6 años
hace 6 años
Hi Erguti
I suppose with your question that you know some electricity, if so you should keep in mind that the process of choosing the protections is not arbitrary, and when it comes to high electrification, it is not possible to determine in a forum like this, for more good that is.
I will try to guide you as it is done, although at this point it is a bit late to ask, since you will understand it with the explanation.
When it is a standard, small or medium house without many complications one can improvise without much calculation, that is what the majority of electrician does; at most, "draw" a rough estimate, then put a thermal of 25 A, 32 A, or at most 40 A in a single-phase rush, the reality that that is anything, but it does not happen to major in the Most cases
When consumption skyrockets, things change; then if or if calculations are made that cannot be oversized much, for obvious reasons, so we must determine the actual loads per circuit , that will determine a cable section of the connection three-phase necessary, and there we can no longer "choose" much, nor change "the piece of cable" from the meter, we must be exact in the protections, since it depends as I said in the section incoming. It is not the same to work with sections of 6 mm², than 16 mm²; We can't put any thermal.
Do the relevant load calculations, and cosnstata if you chose with margin the necessary rush, based on that the general thermomagnetic will be determined.
Comment
9
hace 6 años
Nastor thank you very much for the prompt response. Very clear. The issue came up because I had a 4 mm connection with a thermal of 32 by the distribution company. When I do my calculations the demand for simultaneous power gives me 93 A. (which with a coefficient of simultaneous of 0.7 took it to 63 A). This power had been distributed in the 10 circuits mentioned above. Obviously as I understood with your comment I will have to raise the level of consumption that housing has ... is it correct? From now I am very grateful for your help
17.232
hace 6 años
The degree of electrification is only a reference, and is a result of the charges, not something that you can raise or lower.
You say you have an estimated amperage of 93 A, that is 66 A considering the simultaneity you say (keep in mind that it is the minimum possible reduction) ´, that is, our connection must support about 70 amperes (about 15kw).
It is evident that you will not be able to do it with a single-phase line of 4 mm², in reality with no single-phase line, there you need a three-phase connection (normal high electrification, there the point)
17.232
hace 6 años
I still, if you did the circuits well, you need a connection for three sections of 30 amps each, that is a protection of 32 amps per phase to protect the necessary cable that must be 6 mm², as I said, in the distribution sections to the different secondary boards. This in practice leads to a 4 x 10 mm² (4 x 32A thermal, 40A (30mA) differential circuit breaker)
9
hace 6 años
Thanks Nastor! Sorry for the lack of confidence, I know how to attach files, I am uploading
CONSUMPTION ARTEFACT
LIVING ROOM
TV 200
AIR 6000 FRIG 3000
DECO 50
PHONE 30
PLAY 100
MODEM 100
PRINTER 50
LIGHT 1 100
LIGHT 2 100
LIGHT 3 100
KITCHEN
FREEZER 180
FRIDGE 150
1000 MICROWAVE
WINE CAVA 200
OVEN LIGHT 100
ELECTRIC PAVA 1700
COFFEE MACHINE 100
LIGHT 1 100
LIGHT 2 100
LAUNDRY
IRON 1200
500 WASHERS
LIGHT 1 100
LIGHT 2 100
9
hace 6 años
CONSUMPTION ARTEFACT
SLEEP 2
AIR 3000 FRIG 1500
COMPUTER 400
EQ MUSIC 50
100 light socket
TV 200
DECO 50
SLEEP one
TV 200
TV 200
LIGHT 1 100
LIGHT 2 100
LIGHT 3 100
PPAL SLEEP
ELEC 1200 STOVE
TV 200
50 CHARGER
AIR 3000 1500
LIGHT 1 100
BATHROOM
EXTRACTOR 50
SHAFT 50
LIGHT 1 100
LIGHT 2 100
TOILETTE
HAIR DRYER 2000
SHAFT 50
LIGHT 1 100
FOURTH SAVED
LIGHT 1 100
SIZE VARIOUS 200
I correct values: Total: 18160 w
83 A
9
hace 6 años
Dear Nastor Totally sensible your approach. It is an old house. At the moment I have the survey of consumption and the tables of circuits and sizing that I have published in the post. I understand on the other hand, that the situations to which you mention and that lack common sense, would be addressed by the simultaneity coefficient. I can't find another way to treat them. I'm still grateful and waiting for your input to solve my concern.
17.232
hace 6 años
The simultaneity factor is a misconception, and this refers to the simultaneous uses for example of the sockets, or of appliances that may occur if used at the same time, but we must discard those used for short periods, such as being shavers , hair dryers or epilators (analyze your case), since its use is for minutes; you must also separate the consumption by seasons of the year and use the highest calculated value (you cannot make an installation where you have heaters and air conditioners cooling on at the same time)
17.232
hace 6 años
Anyway, you can overestimate the rush to the main board a little, but from there, it is about being consistent with the reality of the house, and giving a reasonable margin to both the amount of circuits and the protections. This is my personal procedure, I am not quoting any regulations.
62.202
hace 6 años
hace 6 años
Hello
for all high GE corresponds three-phase without exception
In that case you can have the minimum with 4 mm² and general thermal 4x25. The success will depend on a good distribution of the circuits
If you keep single phase, the maximum you can put, thermal 50 and 10 mm² cables, if at any time 50 A are insufficient, you will have to go to three phase because you exceed the maximum supply capacity
For the calculation, the charges are not counted, the circuits are counted according to their classification. if you make a description of each circuit we make a calculation but beyond the calculation you cannot place more amperage than the supply tolerates
Check the meter, there must say the maximum amperage although in BsAs the single-phase T1R supply is up to 10 kW
Regards
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