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Falgun
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Single Phase to Three Phase Conversion Of Current

05/28/2014 5:39 AM

I have one MPDB feeding through 0.415/0.415 kV DYn11 Transformer.Through it further 3 nos three-phase PDB's are there feeding single phase loads summing 100A(1-ph), 90A(1-ph) and 600A(1-ph) respectively. How do I convert this Single phase current to three phase and size switchgear accordingly ?
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Pathfinder Tags: 1-ph to 3-ph conversion
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DmanEng
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#1

Re: Single Phase to Three Phase Conversion Of Current

05/28/2014 8:25 AM

are you talking about something like this? switchgear size? what is your total load and expected load growth? http://en.wikipedia.org/wiki/Phase_converter

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JohnDG
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#2
In reply to #1

Re: Single Phase to Three Phase Conversion Of Current

05/28/2014 9:03 AM

Geezer just wants to know how to size his 3-phase switchgear, given the load specified on each phase. He's not actually "converting" anything.

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JRaef
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#3
In reply to #2

Re: Single Phase to Three Phase Conversion Of Current

05/28/2014 12:44 PM

I agree. But my bigger concern here would be the SEVERE imbalance in load distribution. 60A, 90A and 600A on the three phases??? Forget sizing the switchgear for now, fix THAT first!

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DmanEng
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#6
In reply to #2

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 3:55 AM

he is actually not converting anything

How do I convert this Single phase current to three phase and size switchgear accordingly ?

dummy

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JohnDG
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#7
In reply to #6

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 4:48 AM

The clue is in the word "current". He wants to know how to size his incoming 3-phase switchgear to handle the 3 single-phase loads. See his comment #5.

Make sure you understand what's going on yourself before you start calling others "dummy".

Perhaps you need a pretty picture?

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Falgun
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#5
In reply to #1

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 12:04 AM

No I am not talking about something like it, I am talking about simple distribution on load side.
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DmanEng
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#8
In reply to #5

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 5:06 AM

CR4 ADMIN: Modified Post

Abuse/Attack: This post was deleted because it was an attack on another user. Please review the CR4 Site FAQ and the CR4 Rules of Conduct.

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powersolutionsFBD
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#9
In reply to #8

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 6:45 AM

He may not University Drop Out. The poster may be very intelligent and might have scored more mark than you and me - who knows.

Pity is with the education system. These days you will find more of Electrical Engineers expert in software/ Electronics but poor at Core Engineering.

Where there are many advantages of computers and processors, but there are disadvantages too and this is one example. Ask the poster to solve mental sum - he may look for Calculator.

And we find that the poster is not in a position to express properly what he was looking for - at least I could not make out.

Best for him would have been to draw a Single Line Diagram, put on that the currents and post it for solution - had he drawn one - might be in the process of drawing he would have found answer to his problem. Drawing and Maths are Language of Engineering and I do hope that our young generation of Engineers will give more stress on learning these basics.
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DmanEng
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#10
In reply to #5

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 8:26 AM

CR4 ADMIN: Modified Post

Abuse/Attack: This post was deleted because it was an attack on another user. Please review the CR4 Site FAQ and the CR4 Rules of Conduct.

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JohnDG
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#11
In reply to #10

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 8:39 AM

Your offensive, racist language has been reported.

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jack of all trades
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#4

Re: Single Phase to Three Phase Conversion Of Current

05/28/2014 3:46 PM

Get in an electrician to do the work and at the same time fix your massive phase imbalance.

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HiTekRedNek
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#12

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 9:15 AM

There is obviously something lost in translation.

Please submit a diagram of the present configuration and of the desired end result that you wish to achieve.

Without this information help is going to be hard to find.

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horace40
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#13

Re: Single Phase to Three Phase Conversion Of Current

05/29/2014 9:29 AM

You need advice from a vicar on a roundabout.

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MJ Jordaan
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#14

Re: Single Phase to Three Phase Conversion Of Current

06/03/2014 3:39 AM

Hi mate, If you work with electricity you must supply all the details eg. HV voltage; LV voltage; vector group;KVA of your Transformer

For starters what is your HV voltage

I believe your LV voltage is 415volts

If the HV voltage is 11kV then you can use a 30amp overcurrent setting on your 11kV breaker

If the HV voltage is 22kV then you can use a 15amp overcurrent setting on your 22kV breaker

Regards
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Users who posted comments:

DmanEng (4); Falgun (1); HiTekRedNek (1); horace40 (1); jack of all trades (1); JohnDG (3); JRaef (1); MJ Jordaan (1); powersolutionsFBD (1)

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