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### Topic: Phase sequence indicator (Read 1 time)previous topic - next topic

#### Don_Mwaanga

##### Mar 17, 2017, 02:25 pm
i want to detect phase sequence for 3-phase ac power supply using arduino uno. i want to detect the time lag between the phases. How do i write the code?

#### PaulS

#1
##### Mar 18, 2017, 02:06 pm
Quote
How do i write the code?
Using a text editor.

As for what to write, surely Mr. Google could lend a hand or 14,935,544.

#### vaj4088

#2
##### Mar 18, 2017, 02:20 pm
Much of the code depends upon the hardware, but the functions millis() and micros() may help.

#### Don_Mwaanga

#3
##### Mar 18, 2017, 07:02 pm
The time lag between phase A and phase B is t=0.02/3=0.0067 seconds which is the positive

(RYB)sequence.And again, the time lag between phase A and phase C is t=0.02/3*2=0.013 seconds still

showing the positive (RYB) sequence. Otherwise, if the time lag between phase A and phase B is

t=0.02/3*2=0.013 seconds that's a negative (RBY) sequence. I want to programme the arduino based on

these principles, i have zero knowledge on programming. Need help with the codes

#### vaj4088

#4
##### Mar 19, 2017, 07:24 pm
I  will not help until you post some code that shows that you tried.

If you want code written for you, go to Gigs and Collaborations and bring your wallet.

#### Don_Mwaanga

#5
##### Mar 20, 2017, 09:16 am
I want the codes written for me but I'm in Zambia...

#### PaulS

#6
##### Mar 20, 2017, 11:22 am
Quote
but I'm in Zambia...
So? If that is supposed to mean that you can't afford to pay for help, then learn to use google yourself.

#### Don_Mwaanga

#7
##### Mar 20, 2017, 07:24 pm
I'm willing to pay...

#### Dmitron1036

#8
##### Mar 21, 2017, 08:36 pm
1) Phase sequence: you need to find zero-crossing.
I would advice you to place a comparator for this.

2) Phase to phase angle: logical AND circuit will give you om output time between phases. Wich you can to measure with function (pulse() or so)

#### Don_Mwaanga

#9
##### Mar 22, 2017, 11:53 am
Thanx...i have managed

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