Three Phase to Single Phase Conveter

[mAgtataHO]

to : rdpzycho
oo nga magulo noh?? pero  i like to have idea lang sa phase convertion, pero ang application ko ay 3 phase to single phase tlaga.sorry kung confusing

to : ahlburuto

eh diba separated cia ng certain phase, we are trying to study the three phase Ceiling type airconditioner, wherein hindi kasi gagana yung unit kung hindi proper yung pagkakabit. meaning to say:

Line 1 sa Line 1 lang
Line 2 sa Line 2 ang
Line 3 sa Line 3 lang

hindi pwede pag interchange.

to : alyas
pagkakaalam ko nga out of phase siya nga with a certain degree.mayroon sigurong detector ang unit sa mga phase ng Voltage.. Tama enlighten naman us sa mga experts jan..hehehe


 

[Born2BeWired]

Reading this thread send my head spinning  .

Before this, connecting a single phase equipment to a three phase mains used to be so simple. Our workplace is serviced by 3 phase power source L1 L2 and L3. If I need to connect my single phase lap top computer to our 3 phase source, all I need to do is connect it to any pair, (i.e. L1-L2, L2-L3, or L3-L1). I need not worry about phasing or other stuff. I become choosy only when the equipment draws a significant amount of power, this is where load balancing, as alhburuto mentioned, becomes important.

To sum it up, there is no such thing as power line "3 phase to single phase converter". Any pair (L1, L2, L3) will give you your single phase source.

to : ahlburuto

eh diba separated cia ng certain phase, we are trying to study the three phase Ceiling type airconditioner, wherein hindi kasi gagana yung unit kung hindi proper yung pagkakabit. meaning to say:

Line 1 sa Line 1 lang
Line 2 sa Line 2 ang
Line 3 sa Line 3 lang

hindi pwede pag interchange.

Yes, that's is correct. Pag mali ang kabit mo, reverse ang ikot ng motor compressor mo, di talaga gagana.

[RiDdLeR???]

Ok I did a bit research on the net to satisfy my curiosity.  Anyway there are 2 ways to power 1 phase systems from 3 phase power. 

One method, single phase to ground,  which I generally know is tapping only one line of the 3 phase line and utilizing the neutral or ground.

The other method is a phase to phase connection from 2 lines of the 3 phase lines.  But generally, the output voltage is 173% of the single phase voltage.

This was where I really got confused but technically, you are powering up a single phase device using two phase power. 

As for the single phase to 3 phase conversion, what I found out is it is mostly done through power conversion using a 3 phase power generator being run on a single phase motor.

[ahlburuto]

to : rdpzycho
oo nga magulo noh?? pero  i like to have idea lang sa phase convertion, pero ang application ko ay 3 phase to single phase tlaga.sorry kung confusing

to : ahlburuto

eh diba separated cia ng certain phase, we are trying to study the three phase Ceiling type airconditioner, wherein hindi kasi gagana yung unit kung hindi proper yung pagkakabit. meaning to say:

Line 1 sa Line 1 lang
Line 2 sa Line 2 ang
Line 3 sa Line 3 lang

hindi pwede pag interchange.

to : alyas
pagkakaalam ko nga out of phase siya nga with a certain degree.mayroon sigurong detector ang unit sa mga phase ng Voltage.. Tama enlighten naman us sa mga experts jan..hehehe


 

yung atang airconditioner mo eh merong polarity protection relay na ginamit. yung design ng ikot ng motor eh di mo pwedeng baligtarin kasi merong chance siguro na me masira sa mechanical or sa flow ng fluid nya sa loob. yung mga ganung protection eh applicable sa mga 3 phase design. ang isang application pa nito eh yung sa mga 3 phase submersible pump. they use polarity protection relay.

br

[ahlburuto]

Hindi ko pa rin magets.  Mathematically, you'll definitely get either more or less than 230V output if you use two 230V out of phase lines.

Your answer just assumes you'll get 230V 60Hz single phase from using 2 230 live lines which are out of phase w/o any explanation.

Ang pagkaka-intindi ko, in order to get lets say a single phase 230V from a three-phase system is by tapping only one line lets say L1, and feeding it to a 1:1 transformer.  The output of the transformer is center-tapped and the center tap is earth grounded.  This way, you get 2 115V on each line that adds up to a 230V output. 

I'm not an electrical engineer so I'm not sure of my understanding.

sa system voltage na 230vac 3phase eh kung imeasure mo ng multimeter yung phase to phase eh you will get 230vac. ngayon kung imeasure mu naman yun line to ground eh you will get 127vac.

[ahlburuto]

Reading this thread send my head spinning  .

Before this, connecting a single phase equipment to a three phase mains used to be so simple. Our workplace is serviced by 3 phase power source L1 L2 and L3. If I need to connect my single phase lap top computer to our 3 phase source, all I need to do is connect it to any pair, (i.e. L1-L2, L2-L3, or L3-L1). I need not worry about phasing or other stuff. I become choosy only when the equipment draws a significant amount of power, this is where load balancing, as alhburuto mentioned, becomes important.

To sum it up, there is no such thing as power line "3 phase to single phase converter". Any pair (L1, L2, L3) will give you your single phase source.

Yes, that's is correct. Pag mali ang kabit mo, reverse ang ikot ng motor compressor mo, di talaga gagana.

this is correct....

[ahlburuto]

Ok I did a bit research on the net to satisfy my curiosity.  Anyway there are 2 ways to power 1 phase systems from 3 phase power. 

One method, single phase to ground,  which I generally know is tapping only one line of the 3 phase line and utilizing the neutral or ground.

The other method is a phase to phase connection from 2 lines of the 3 phase lines.  But generally, the output voltage is 173% of the single phase voltage.

This was where I really got confused but technically, you are powering up a single phase device using two phase power. 

As for the single phase to 3 phase conversion, what I found out is it is mostly done through power conversion using a 3 phase power generator being run on a single phase motor.

power conversion na sinabi mo naman eh ang naging application nila eh ganito, single phase yung supply nila eh kelangan nila ng 3phase line. what they did is they get 1 single phase motor and directly coupled it to a 3phase generator. then they run the single phase motor to get a 3phase supply.

kaya ka kasi nalilito sa 3phase eh isinasama mo yung word na phase eh. basta sa 3 phase supply eh yung dalawang line dun na maalin eh single phase. pag system voltage eh 230vac, phase to phase nun eh 230vac. pag sinabing 440vac eh 440vac ang phase to phase nun.

bang usapan dun yung angle. medyo malalim na yun. hehehehe....

BTW:

anung application ba? eto ba yung sa HVAC nyo? or what?

BR

[mAgtataHO]

yung atang airconditioner mo eh merong polarity protection relay na ginamit. yung design ng ikot ng motor eh di mo pwedeng baligtarin kasi merong chance siguro na me masira sa mechanical or sa flow ng fluid nya sa loob. yung mga ganung protection eh applicable sa mga 3 phase design. ang isang application pa nito eh yung sa mga 3 phase submersible pump. they use polarity protection relay.

br

tama sir ahlburuto. meron nga yung polaity protection ang compressor motor.. isa lang naman ang direction ng ikot nya supposedly kapag nakakabit na sya sa unit or else the unit will be functioned abnormal at pwedeng masira pa ang compressor motor.