measuring 3-phase mains voltage and current

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zpenava

Joined: 09 Jul 2002
Posts: 20

07 Apr 2004 16:26 measuring 3 phase voltage

Are anyone have good and simple schematic for measuring 3-phase mains voltage and current (380 V) with current and voltage transformers. I need some sort of amplifiers and filters for that, but I could not find any detailed and useful schematic.

Thanks!

marie65

Joined: 15 Jan 2002
Posts: 217
Helped: 10

07 Apr 2004 17:20 how to measure 3 phase voltage

You can use ADE7754 or the newest one ADE7758 powermeter that send on SPI serial, all data regarding the 3 phase powerlines (voltage, current, phase, power, energy etc)

rauol

Joined: 02 Oct 2002
Posts: 363
Helped: 11

08 Apr 2004 17:20 3 phase mains

if you have to measure power factor, voltage etc. for R&D purpose
FLUKE43B is best but price 3000$ approx. Laughing

cesare

Joined: 21 Feb 2002
Posts: 176
Helped: 7

08 Apr 2004 17:43 measuring 3 phase current

TI is developing several applications based on the MSP430 family for the measurement of electric power.

They offers 2 solutions :

MSP430FE427 includes on board a DSP cell for the calculus of the energy but is available only for single phase applications.

For three phase applications they suggest the use of a general purpose MSP430F449.

See the attachements for details

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muko

Joined: 03 Mar 2004
Posts: 37
Helped: 1

06 Aug 2004 10:17 measuring three phase voltage

You can use chips from :analog devices ADEXXXX chips. And also Sames Micro. Electronics produces like these chips

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tguclu

Joined: 23 Aug 2005
Posts: 1

23 Aug 2005 15:01 measuring mains voltage

marie65 wrote:

You can use ADE7754 or the newest one ADE7758 powermeter that send on SPI serial, all data regarding the 3 phase powerlines (voltage, current, phase, power, energy etc)

Hi.
I'm using ADE7754 wşth PIC 18f458.But I have a serious problem.
I can read voltages of the three phases but ADE7754 only measures the period of phaze A.So if I don't plug phase A , the period of phaze B and phaze C are all 0.But in fact they are 50Hz.
Anyone has an idea?
I think it's a initialization problem but could not solve yet.
if you know pls email me
tguclu(at)savronik.com.tr

alberto1683

Joined: 13 Jul 2007
Posts: 19

15 Jul 2007 0:48 measuring 3 phase power

Hi.
I'm using ADE7754 with PIC 16F876.But I have many problems.
I can t read nothing . I use the module MSSP of the PIC, and use DIN,DOUT and SCLK with Pull up resistance. I try know the temperature of the PIC,, but sends me 0.

Can you help me please??

flatulent

Joined: 19 Jul 2002
Posts: 4877
Helped: 324
Location: Middle Earth

15 Jul 2007 0:54 three phase mains voltages

In situations like this it best to start with a known load and use a hand held VOM or DVM to measure the outputs of the sensing transformers and do hand calculations. Next have your automated data recording system measure the transformer outputs and compare the readings with your hand held insturment readings. Once the automatic collector is able to match your readings then compare the calculations of the automatic system with your hand calculations.

alberto1683

Joined: 13 Jul 2007
Posts: 19

25 Aug 2007 4:09 measuring 3-phase current

Hello friends ,, I´ m working with the ADE7754, and I have a problem with the reading

of vrms registers. I read between 214V and 224V and the input is 220V . The error is

too big 3.6% approximetly. I want to know if you have the same numbers..

I wrote (-5) in AVRMSOS and read with zero crossing detection,, do you use pull up

with the IRQ??

thanks..

oneshotnike

Joined: 25 Mar 2008
Posts: 4

01 Apr 2008 21:30 mains voltage measurement

I have tried to work with this chip ADE7758 but have failed in each attempt. I tried to make chip talk with the MC68HC11, PIC28, & FPGA. MC68HC11 was the worst one, where the programing was the matter. PIC28 - I fried this one the first time. And the FPGA - I did succeeded with the programing, but here the chip was not getting caliburated with the output, where I am getting repeatedly 'FFFF' in the 7segment output.

Hence, I request any of them who know or have done their project to come forward and help, regarding this failur that I have faced.

I will appreciate your help, feed back or even I will buy/pay for your time or the whole project.

Feel free to email at pm_kle(at)yahoo.co.uk
thanks