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Subject: Setting voltage standards for household power supply
"Brazil is one of the very few countries that does not have a standard mains voltage"
A brief overview of the proposal
Items of interest:
- Main voltages used in Brazil
- Standards used in Brazil
- The proposed solution starting from already existing standards and solutions in use
* * * * *
Briefly, the proposal for household supply voltage consists in
following the solution of the 'UK Reduced low voltage (RLV)', but for the lowest voltage used in Brazil, which is 127V at 60Hz.
Now, consider it so:
The single phase voltage is 127V 60Hz, though having a "centre tapped Earth" reducing the voltage to Earth to 63.5V a.c.
The three phase will be 127V 60Hz phase to phase, with about 73V a.c. to Neutral/Earth.
And, to be more practical, consider it so:
The single phase voltage is 120V 60Hz, though having a "centre tapped Earth" reducing the voltage to Earth to 60V a.c.
The three phase will be 120V 60Hz phase to phase, with about 70V a.c. to Neutral/Earth.
The 120V might be better however, as long you might find some more apparatus world wide for 120V while the 127V apparatus will be a bit underdriven…
The three phase will be 120V 60Hz phase to phase, with about 70V a.c. to Neutral/Earth.
The 120V might be better however, as long you might find some more apparatus world wide for 120V while the 127V apparatus will be a bit underdriven…
The main interest for the above into discussion proposal is to have the lowest possible risk of danger, at the lowest at disposal used supply voltage standard. So, the 110V and 120V has to be into discussion, regardless anything.
In our Light Communities the safety of its inhabitants must be at first of all into discussion.
On other side, we can point out that the designation of supply networks minimizing the energy loses while maintaining the maximal safety into discussion will not be a problem as long we have short networks and free energy devices.
And even for remote areas, as the case might be, we will chose the cable section as much as needed.
discussion to continue...
Q and A page: https://areasoflightdevelopment.blogspot.com/p/q-voltages.html
Give also a read here:
https://en.wikipedia.org/wiki/IEC_60906-1#Brazilian_NBR_14136_standard
https://en.wikipedia.org/wiki/Utility_frequency#400_Hz
http://www.encyclopedia-magnetica.com/doku.php/extra-low_voltage
Useful Links:
Brazil is one of the very few countries that does not have a standard mains voltage:
https://www.worldstandards.eu/electricity/plug-voltage-by-country/brazil/
UK Reduced low voltage (RLV)
The IET / BSI (BS 7671) also define Reduced low voltage (RLV) which can be either single phase or three phase A.C. This system has been used for many years on construction sites. Both single and three phase. The single phase voltage is 110 V a.c. though having a "centre tapped Earth" reducing the voltage to Earth to 55 V a.c. The three phase is 110 V phase to phase, 63 V to Neutral / Earth. This system is slightly outside ELV but still very commonly used for cord powered hand tools and temporary lighting in hazardous areas.
https://en.wikipedia.org/wiki/Extra-low_voltage#UK_Reduced_low_voltage_(RLV)The IET / BSI (BS 7671) also define Reduced low voltage (RLV) which can be either single phase or three phase A.C. This system has been used for many years on construction sites. Both single and three phase. The single phase voltage is 110 V a.c. though having a "centre tapped Earth" reducing the voltage to Earth to 55 V a.c. The three phase is 110 V phase to phase, 63 V to Neutral / Earth. This system is slightly outside ELV but still very commonly used for cord powered hand tools and temporary lighting in hazardous areas.
Brazil
In Brazil, ELV (Extra-baixa tensão or EBT in Portuguese) is officially defined in Regulatory Standard no. 10 from the Brazilian Ministry of Labor and Employment as any voltage "not exceeding 50 volts a.c. or 120 volts d.c.".[5]
Although that standard defines safety rules for electricity, the Regulatory Standard no. 12 requires an even lower voltage for start and stop devices on machines and equipment made from March 2012 and on, stating it shall not exceed 25 volts a.c. or 60 volts d.c.
https://en.wikipedia.org/wiki/Extra-low_voltage#Brazil
https://en.wikipedia.org/wiki/Ufer_ground
Bentonite-concrete mix for ufer grounding: http://psasir.upm.edu.my/id/eprint/60128/
https://www.researchgate.net/publication/304942763_Behaviour_of_a_New_Material_that_Improves_Ufer_Grounding_Practice
This comment has been removed by the author.
ReplyDeletePlease visit the Q and A page to find the answers to your questions:
Deletehttps://areasoflightdevelopment.blogspot.com/p/q-voltages.html
When you say "120/240v like almost all north America" do you mean this one:
Deletehttps://ctlsys.com/support/two-phase_electrical_service/
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ReplyDeleteYou are right "If you have 120v phase voltage, likely you will have 208v line voltage. Not 120v".
DeleteIn the above presented case, the proposal, you have the 70V phase voltage and also the 120V the line voltage.
In this proposed case you will use the line voltage (from 2 phases) to supply the single-phase apparatus.
Yu will never use the 70V phase voltage for anything. In this case only.
The main interest for the above into discussion proposal is to have the lowest possible risk of danger, at the lowest at disposal used supply voltage standard. So, the 110V and 120V has to be into discussion, regardless anything.
DeleteIn this case (in which this has to be the maximal voltage), for sure it has to be the line voltage (at disposal in your house). If you touch a phase and the ground, you have only 70V, but not 120V as in your described case.
In our Light Communities the safety of its inhabitants must be at first of all into discussion.
This comment has been removed by the author.
DeleteAs stated, the main interest for the above into discussion proposal is to have the lowest possible risk of danger, at the lowest at disposal used supply voltage standard. So, the 110V and 120V has to be into discussion, regardless anything.
DeleteIn our Light Communities the safety of its inhabitants must be at first of all into discussion.
In our proposal, the phase voltage is only about 70V, instead of 120V, so it is less dangerous.
Please visit also the Q and A page:
https://areasoflightdevelopment.blogspot.com/p/q-voltages.html
This comment has been removed by the author.
ReplyDeleteWe do not talk about taking the needed power from a transformer!
DeleteWe consider our free-energy device, with Y connections, having an output of 3x120/70V, with only the lines voltage active (accessible to outlets/plugs), and the neutral grounded, and inaccessible to outlets.
Diagrams will come in place, for a better understanding.
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DeleteThis comment has been removed by the author.
DeleteYes, you are right now. We try not to step it down to an usable 70V.
DeleteThe case we discuss is similar to the safety regulation in this concern, IET / BSI (BS 7671), that refers to 110V usable, but we consider it also for 120V usable voltage:
https://en.wikipedia.org/wiki/Extra-low_voltage#UK_Reduced_low_voltage_(RLV)
"The IET / BSI (BS 7671) also define Reduced low voltage (RLV) which can be either single phase or three phase A.C. This system has been used for many years on construction sites. Both single and three phase. The single phase voltage is 110 V a.c. though having a "centre tapped Earth" reducing the voltage to Earth to 55 V a.c. The three phase is 110 V phase to phase, 63 V to Neutral / Earth."
This comment has been removed by the author.
DeleteThis comment has been removed by the author.
ReplyDeleteEven your claims are right from the point of view of the 'mainstream' science, we consider to have the knowledge to set our own standards for Areas of Light, in which we have to have total independence from 'mainstream' power networks.
DeleteSo we are going to set our own standards.
Please visit our q and a page: https://areasoflightdevelopment.blogspot.com/p/q-voltages.html