3000A DC Fluxgate or Hall current sensor. - Page 1
Forum section: electronics / general

author: geggi1
author_rank: Frequent Contributor
timestamp: December 19, 2023, 12:39:15 pm
content: Hi.I'm looking for a 3000A DC fluxgate or hall current sensor.The problem is that I have found a sensor but there are a year delivery time and i need the sensor by 1 of April.My application is switching polarity between + / - 1500A with a transient of 3000A on the flanks.The sensor must have a precision in the range of 0,0014%Can anybody recommend a sensor?

author: Hawaka
author_rank: Regular Contributor
timestamp: December 19, 2023, 04:44:46 pm
content: AFAIK there isn't a lot of supplier for that kind of sensor. It would be either LEM (with the ultrastab serie) or DaniSense. As you are probably ready to spend quite a lot of money, I would definitely get in touch with their engineers. Maybe they could give you a rental until you get yours delivered.Other options as fluxgate would also be interresting to look into. Pearson electronic maybe, or even a big shunt with a precision amp?Good luck in any case.

author: geggi1
author_rank: Frequent Contributor
timestamp: December 19, 2023, 07:01:38 pm
content: Where planing for the LEM sensors but with 12months delivery it will be to late.Are in contact with Damisense and they might be able to helpe.

author: Marco
author_rank: Super Contributor
timestamp: December 19, 2023, 07:25:25 pm
content: There's some used ITZ 5000-140 + power supplies on ebay.

author: voltsandjolts
author_rank: Unknown
timestamp: December 19, 2023, 09:03:41 pm
content: Nice find!https://www.ebay.com/itm/155195119144LEM ITZ ULTRASTAB power supply and ITZ 5000-140 High Precision Current Sensor6 sets available at $5K eachimmediate availability

author: coromonadalix
author_rank: Super Contributor
timestamp: December 22, 2023, 03:38:46 pm
content: you have fluke current sensor coils ... and other brandssay 1000A = 100mv ... rogowski coil ?? but such precision?

author: Faringdon
author_rank: Super Contributor
timestamp: December 22, 2023, 05:37:53 pm
content: Here is a nice cheap fluxgate circuit for you...https://repositorio.ufmg.br/bitstream/1843/37430/2/Design%20of%20a%20Low-Cost%20Residual%20Current%20Sensor%20for%20LVDC%20Power%20Distribution%20Application.pdf

author: ahbushnell
author_rank: Frequent Contributor
timestamp: December 23, 2023, 02:53:17 am
content: Quote from: coromonadalix on December 22, 2023, 03:38:46 pmHe wants DC

author: coppice
author_rank: Super Contributor
timestamp: December 23, 2023, 02:58:40 am
content: Can you find Hall sensors that achieve 0.0014% accuracy?

author: f4eru
author_rank: Super Contributor
timestamp: December 23, 2023, 09:18:13 am
content: Quote from: coppice on December 23, 2023, 02:58:40 amClearly: Nope.And if your system needs that kind of accuracy, there is usually something wrong in the system design.

author: coppice
author_rank: Super Contributor
timestamp: December 23, 2023, 04:03:31 pm
content: Quote from: f4eru on December 23, 2023, 09:18:13 amNot at all. That's about the accuracy grid operators expect from their power measurements. So, its not an uncommon requirement for current sensors.

author: f4eru
author_rank: Super Contributor
timestamp: December 23, 2023, 05:29:12 pm
content: Don't confuse dynamic range with accuracy.

author: coppice
author_rank: Super Contributor
timestamp: December 23, 2023, 05:36:26 pm
content: Quote from: f4eru on December 23, 2023, 05:29:12 pmWas that addressed to me? Dynamic range is not usually a big deal with grid measurements. The greatest extremes between high and low load on big aggregates in the grid are not that big. Its only in the tributaries, like a domestic energy meter, where you need several thousand to one dynamic range, and typical accuracy there only needs to be 0.5%, even at the high end of the range. For various reasons grid operators demand measurements to extreme accuracy, even if many of them have more to do with keeping accountants happy than any technical or business operations issue.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: December 23, 2023, 05:37:03 pm
content: Why on earth do you need that accuracy on 3000A?

author: geggi1
author_rank: Frequent Contributor
timestamp: December 25, 2023, 12:03:54 am
content: I can not tell about the application it will be used in because it is a development project.The accuracy is important because it is not the mean current we are measuring, but fluctuations in the current form the local environment.

author: coppice
author_rank: Super Contributor
timestamp: December 25, 2023, 12:07:22 am
content: Quote from: geggi1 on December 25, 2023, 12:03:54 amThat sounds like you need to detect fine incremental changes (i.e. high resolution), rather than high accuracy.