Difference Between 220V & 380V 3-Phase Power Supplies: Understanding Inverters & Voltage Levels

Question

What is the difference between 220V three-phase power and 380V three-phase power supply? Many manufacturers report that they have 3-phase products for these voltages. E.g. inverters 200 to 230VAC 1/3 phase or 380 to 460 VAC 3 phase power supply, etc.

As far as I know, the voltage between phase and "zero" is 220-230V, and between phases is 380-400V.

12robert12 · Answer

you are right, i.e. you can load 1 phase or 3 phases in a star in these inverters (1/3 phase = 1 of 3 phases), it will be 230 and if you connect 3 phases to the motor, for example, in a triangle, it is 400V.

Anonymous · Answer

Hello
I do not know, because I did not try to load one phase at the output of the inverter
but maybe this system works - I don't know?
as for the power supply:
1. there are inverters powered from one phase, i.e. 230V
2. there are 3-phase inverters, i.e. 400V phase-to-phase
or
3. there are 3-phase inverters, i.e. phase-to-phase 230V

Szaruś · Answer

Ie. do I understand correctly, inverters powered from 3 phases in a star are 3-phase 230V, and 3-phase in a triangle is 3-phase 400V?

Anonymous · Answer

Hello
ok again:
1.power supply inverter single-phase 230V - inverter output 3x230V (phase-to-phase)

2. three-phase inverter power supply 400V (phase-to-phase) - inverter output
3x400V (phase-to-phase)

3. three-phase inverter power supply 230V (phase-to-phase) - inverter output
3x230V (phase-to-phase)

there are also circuits which, instead of 3x230V (phase-to-phase), can be powered from one phase -230V, but then you will only get the output
110V (phase-to-phase)

and the question of the input and output star and triangle is a separate matter
is that enough

Szaruś · Answer

My house connection has 3 phases (400 V between phases, 230 V between phase and neutral). Can I connect devices powered by point 2 or 3 to it?

Anonymous · Answer

Hello you can connect according to all combinations, but I recommend that you read the operating manual or operation and maintenance documentation (DTR) before connecting

thalex · Answer

Our networks have a voltage of 3x400V This means that the phase-to-phase voltage is 400V and the voltage between phase and neutral (N) is 230V There are networks with 3x220V and then the phase-to-phase voltage is 220V and the voltage between phase and zero is 127V. An example would be the engine it writes on; 3x230 - triangle 3x400 - a star Means that the motor can work in a 3x230V network connected in delta and in the 3x400V network connected in a star (i.e. such a motor cannot be delta connected in our network, in our delta network a delta and star connected motor could work, but on it it must write 3x400V triangle / 3x660V star, for these motors, star / delta switches are used in our networks. If we use a 230V single-phase inverter and a typical 3x230V triangle / 2x400V star motor, the motor must be switched to work with such a triangle inverter. These inscriptions on electric receivers define the types of networks in which these receivers can work Szaruś I have briefly described the issue, but I will be happy to answer other similar questions here and there too :wink: Please note that the previous statements contain a lot of mistakes!

Anonymous · Answer

Hello if any statements contain errors, they should be corrected - no matter who wrote them

Szaruś · Answer

It's just to put it in order.

Here is an example of one manufacturer's data plate:
Difference Between 220V & 380V 3-Phase Power Supplies: Understanding Inverters & Voltage Levels

Difference Between 220V & 380V 3-Phase Power Supplies: Understanding Inverters & Voltage Levels

So, if I understand correctly, those with a 380-460 V 3-phase power supply and a 200-230 V single-phase supply are suitable for Polish conditions. So, for example, the model 1305-AA02A is not suitable, but the AA03A model is single-phase). And all "BA" models are OK?

Anonymous · Answer

Hello True, all AA series 3-phase models are not suitable for our network, unless I use a transformer or autotransformer to lower the voltage BA series is OK

ADACHO · Answer

Hello. I would like to draw my colleague's attention to a certain irregularity presented by Geguś. The inverter power supply does not necessarily determine what we get at the output . I have inverters powered by 1-phase 230V and it is possible to set the output voltage . therefore delta- or star-connected motors can be connected to them . Supply quantities are a separate matter .. but I can see that you are clear on this matter

Anonymous · Answer

Hello yes, there was an inaccuracy on my part, because when I gave the output voltages, I meant the maximum voltage that can be obtained in a given configuration

thalex · Answer

forgive goose but I would have to correct every post of yours. all inverters in the table are suitable for our networks. The choice depends on the engine at our disposal. Where do the 110V come from :?: But perhaps on one winding of the star-connected motor coil? ps. I will not mention that you do not write anything whether you need to switch the motor in a triangle with a single-phase inverter but it is finally a discussion forum; so I will not be allowed to contribute to the discussion.

thalex · Answer

All inverters in this table are suitable for our networks. The choice depends on the engine you have. A problem is created if you have one single phase inverter and a three-phase motor (low power) and there is no all the ends removed coils, which makes it impossible to switch it for delta operation. The selection of the inverter should be started with the motor you have.

_Tomaszz · Answer

I agree with Thalex's post above!

As for the table - AA series converters can be connected to a 230V three-phase network (not with us) or to one 230V phase - at the output of the device you will get 3x230V phase-to-phase,
we connect the BA series only to the 3x400V network, obtaining 3x400V at the output.

Supporting my colleague Thalex, I will write to tell you what type of motor you have (if you have one) and how you can power the converter (single-phase or three-phase).

Anonymous · Answer

Hello
1.I do not write anything about the load at the inverter output, where it is not
the topic of this thread, and what we connect does not matter - we can connect motors, bulbs, transformers, resistors and buy other things

2. genguś wrote:
there are also circuits which, instead of 3x230V (phase-to-phase), can be powered from one phase -230V, but then you will only get the output
110V (phase-to-phase)

well, as what I wrote is wrong, I am asking for precise calculations,
including the applied formulas, what voltage will we get, because I could not squeeze any more, but maybe I use dupiate devices - I do not know

3. geguś wrote:
if any statements contain errors, they should be corrected - no matter who wrote them

what i do:
thalex wrote:
-all inverters from the table are suitable for our networks. The choice depends on the engine at our disposal.
end
- does connecting something at the output mean how we supply the input?
- or maybe the other way around?
- can each device powered by three phases be powered from one?
- I know such that no, but maybe I'm wrong- I don't know?
and next:
This means that the phase-to-phase voltage is 400V and the voltage between phase and neutral (N) is 230V

There are networks with 3x220V and then the phase-to-phase voltage is 220V and the voltage between phase and zero is 127V.
end
- as far as I know, it is phase and interfacial (extreme) voltage
- as far as I know, we have a PEN, PE, N conductor

one thing puzzles me:
you write about inverters, and the basic concepts are unfamiliar to you
basic for those who have attended the SEP course at least once
- but maybe I'm wrong- I don't know?

thalex · Answer

Hello everyone, especially Szarusia HHAAALLLLOOO Szaruś are you satisfied with the answer ????? Regarding the table; I think it is not exact because it is not written how many phase the power supply is, I would bet (when it comes to 200-230) that such an inverter is intended for one phase, e.g. 230V, so it fits our network. Thanks other plate for support. Sorry Dude but the red square (I mean your square) obliges you to do something.

Szaruś · Answer

I was gone for a few days, and here I can see a discussion broke out.

And I do not have the engine yet (but I will), I just wanted to get an idea of the topic.

Thanks for the replies, now (I guess

) lightened up a bit.

krzysiek-ii · Answer

if you want to know more about inverters and their power supplies, go to: www.schneider-electric.pl

ln · Answer

And I have such a problem.
I have a device with a built-in Tamela 380V motor and three wires coming out. I do not have access to this box as it is in ordinary engines. The motor is probably connected with a star because the sign is marked with a Y sign (upside down), other parameters 0.8kW, stand. 380V 2.2A Cos? 0.74 1400rpm.
The device works nicely in three phases, and I would like to fire it in an apartment where there is one. It is a grinder, it is important to keep the rotation and the right torque (hence the three phases).
The question is whether it can be done somehow with capacitors so that it can be done on one phase. Replacing the motor is absolutely not an option, it is impossible / unprofitable - the motor is built into the body of the device.
If the inverter is OK, but I read some of the previous posts and I don't understand anything except that it would require a delta connection of the motor, and I can't do anything but these three wires, because there's nothing inside except the hole from which they come out.
In addition, on the Allegro I met mainly with inverters described in this way: input 230V, output 0-input or the same but input 380V.
I need something that will convert one 230V phase to three 380V shifted accordingly.

atlantel · Answer

Hello!
Do you have access to a current clamp and voltage meter, if you have an electrician or a friend who would measure the mains voltage and current consumed during normal operation of the grinder, I will answer you - is it possible to use an inverter? Using a 3-phase motor as a single-phase in your device is rather hardly possible due to the drastic reduction in power.
greetings

Krzysiek.UK · Answer

Hello, I can see that this topic is probably related to my problem, so I got a pressure washer and it requires a socket that, as far as I know, has 400v, unfortunately I do not have one in my house, is there any possibility to run it without such a socket?

krzysiek-ii · Answer

From the inverter 1phase - the motor must be in the triangle between the wired 230v from one phase you will not do 400v

Difference Between 220V & 380V 3-Phase Power Supplies: Understanding Inverters & Voltage Levels

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