# \#3-phase **URL:** https://community.openenergymonitor.org/tag/3-phase/81.md [Latest](https://community.openenergymonitor.org/latest.md) · [Categories](https://community.openenergymonitor.org/categories.md) · [Tags](https://community.openenergymonitor.org/tags.md) --- ## [Help with 3-phase monitoring using emonPi2](https://community.openenergymonitor.org/t/help-with-3-phase-monitoring-using-emonpi2/27340)
**Author:** [@sceis](https://community.openenergymonitor.org/u/sceis)\ **Replies:** 3\ **Last updated:** [5 December 2024 14:03 UTC](https://community.openenergymonitor.org/t/help-with-3-phase-monitoring-using-emonpi2/27340 "2024-12-05T14:03:47Z")
Hello, I am currently trying to configure/validate/calibrate 3 phase readings from my emonPi2 before going on site to install this. Initially, I have a 3-phase circuit with a resistive load only. I am using a 3-phase net… --- ## [Update on 3-phase system](https://community.openenergymonitor.org/t/update-on-3-phase-system/26556)
**Author:** [@mglikestomeasurestuf](https://community.openenergymonitor.org/u/mglikestomeasurestuf)\ **Replies:** 4\ **Last updated:** [13 August 2024 17:30 UTC](https://community.openenergymonitor.org/t/update-on-3-phase-system/26556 "2024-08-13T17:30:03Z")
The three-phase power supply has been available for a little while now. How well is it implemented? I can’t find much info about it. Perhaps a status update could be given here, or documented. Is it “just working” or oth… --- ## [Emon Pi2 on Three Phase supply and Solar, one solar reading incorrect](https://community.openenergymonitor.org/t/emon-pi2-on-three-phase-supply-and-solar-one-solar-reading-incorrect/26447)
**Author:** [@CampdenLad](https://community.openenergymonitor.org/u/CampdenLad)\ **Replies:** 5\ **Last updated:** [19 July 2024 08:38 UTC](https://community.openenergymonitor.org/t/emon-pi2-on-three-phase-supply-and-solar-one-solar-reading-incorrect/26447 "2024-07-19T08:38:14Z")
I’ve installed an EmonPi2 with 12 Ct’s to monitor Supply, Load 1, Solar generation, and Load 2. I reinstalled the 3phase 12 CT sketch from within the Admin menu The Voltages on the 3 phases all seem ok. All the phases… --- ## [EmonPi PV monitor three-phase](https://community.openenergymonitor.org/t/emonpi-pv-monitor-three-phase/20601)
**Author:** [@Alba4PVWa](https://community.openenergymonitor.org/u/Alba4PVWa)\ **Replies:** 10\ **Last updated:** [24 March 2024 12:58 UTC](https://community.openenergymonitor.org/t/emonpi-pv-monitor-three-phase/20601 "2024-03-24T12:58:11Z")
Can the Energy Monitor be used for a 3 Phase PV system ? --- ## [3 phases - 3 wires, no neutral - power computation](https://community.openenergymonitor.org/t/3-phases-3-wires-no-neutral-power-computation/11133)
**Author:** [@pitouze](https://community.openenergymonitor.org/u/pitouze)\ **Replies:** 17\ **Last updated:** [27 August 2019 15:44 UTC](https://community.openenergymonitor.org/t/3-phases-3-wires-no-neutral-power-computation/11133 "2019-08-27T15:44:34Z")
Greetings from Belgium ! I am currently installing an OpenEnergyMonitor on my main fusebox. I live in Belgium, and my house is connected with 3phases - 3wires (no neutral, 220V between phases, 132V between phase & grou… --- ## [Which sketch for 3 phase multiple RF loads](https://community.openenergymonitor.org/t/which-sketch-for-3-phase-multiple-rf-loads/21413)
**Author:** [@gerombo](https://community.openenergymonitor.org/u/gerombo)\ **Replies:** 3\ **Last updated:** [3 October 2022 00:13 UTC](https://community.openenergymonitor.org/t/which-sketch-for-3-phase-multiple-rf-loads/21413 "2022-10-03T00:13:42Z")
Hi, I’m currently using an EmonTxV3\_4 with Continuous Monitoring firmware on my 3-phase installation. As a next step for the project I would like to start diverting energy, but I’m struggling to select the right firmwar… --- ## [3-phase measurements are incorrect](https://community.openenergymonitor.org/t/3-phase-measurements-are-incorrect/19479)
**Author:** [@famaia](https://community.openenergymonitor.org/u/famaia)\ **Replies:** 1\ **Last updated:** [10 January 2022 17:20 UTC](https://community.openenergymonitor.org/t/3-phase-measurements-are-incorrect/19479 "2022-01-10T17:20:35Z")
Hello, We have deployed the 3phase firmware (GitHub - openenergymonitor/emontx-3phase: emonTx 'approximate' 3-phase firmware) on a few emonTX and the values measured against another meters and equipments are always diff… --- ## [emonTX - 3Phase Firmware - do I actually need CT4?](https://community.openenergymonitor.org/t/emontx-3phase-firmware-do-i-actually-need-ct4/19068)
**Author:** [@Matthias\_V](https://community.openenergymonitor.org/u/Matthias_V)\ **Replies:** 5\ **Last updated:** [19 November 2021 23:11 UTC](https://community.openenergymonitor.org/t/emontx-3phase-firmware-do-i-actually-need-ct4/19068 "2021-11-19T23:11:45Z")
I just bought an emonTX with the 3Phase Firmware and am about to calibrate it. Currently i am only having 3 clamps attached but in the sketch there is the mention that you should use the 4th clamp on load/infeed connecte… --- ## [OpenEVSE DIY Tethered 3-phase](https://community.openenergymonitor.org/t/openevse-diy-tethered-3-phase/6731)
**Author:** [@vinay\_jakkal](https://community.openenergymonitor.org/u/vinay_jakkal)\ **Replies:** 47\ **Last updated:** [7 August 2021 22:35 UTC](https://community.openenergymonitor.org/t/openevse-diy-tethered-3-phase/6731 "2021-08-07T22:35:45Z")
How to use the contactor relay for 3 phase 440 v supply using the Open EVSE kit --- ## [Update to 3-Phase PLL sketch](https://community.openenergymonitor.org/t/update-to-3-phase-pll-sketch/8610)
**Author:** [@Robert.Wall](https://community.openenergymonitor.org/u/Robert.Wall)\ **Replies:** 18\ **Last updated:** [31 July 2021 16:25 UTC](https://community.openenergymonitor.org/t/update-to-3-phase-pll-sketch/8610 "2021-07-31T16:25:38Z")
Continuing the discussion from Arduino IDE problem: It appears that version 1.8.7 of the Arduino IDE requires a definition of the showString( ) function to be placed in the main sketch. This problem manifested itself in… --- ## [Three-phase emonTx negative power values?](https://community.openenergymonitor.org/t/three-phase-emontx-negative-power-values/17828)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 1\ **Last updated:** [26 May 2021 14:21 UTC](https://community.openenergymonitor.org/t/three-phase-emontx-negative-power-values/17828 "2021-05-26T14:21:50Z")
We’ve got a couple of emonTx units running three-phase firmware installed monitoring some three-phase circuits. One or two of the phases often drops below 0W e.g Any ideas what could be causing this? @Robert.Wall --- ## [Advice before hardware purchase - 3 phase industrial unit](https://community.openenergymonitor.org/t/advice-before-hardware-purchase-3-phase-industrial-unit/17214)
**Author:** [@snerd9334](https://community.openenergymonitor.org/u/snerd9334)\ **Replies:** 2\ **Last updated:** [16 March 2021 13:37 UTC](https://community.openenergymonitor.org/t/advice-before-hardware-purchase-3-phase-industrial-unit/17214 "2021-03-16T13:37:31Z")
Hello, thank you for reading my post. I lease an industrial unit supplied with 3 phase electricity. It is important for me to track Power Factor due to additional charges if this is out of limits. First question: Does … --- ## [emonTx for 3-phase @380V](https://community.openenergymonitor.org/t/emontx-for-3-phase-380v/4881)
**Author:** [@artem.avtandilov.zf](https://community.openenergymonitor.org/u/artem.avtandilov.zf)\ **Replies:** 6\ **Last updated:** [12 November 2020 13:03 UTC](https://community.openenergymonitor.org/t/emontx-for-3-phase-380v/4881 "2020-11-12T13:03:28Z")
Hi everyone, I am trying to monitor the power consumed by an EV while charging. It will be a type 2 connector with 11kW power at most. Can I use one or more inputs at 380V given that maximum power will not exceed 11kW… --- ## [Monitoring Solar + Electricity with 2 phases](https://community.openenergymonitor.org/t/monitoring-solar-electricity-with-2-phases/15297)
**Author:** [@bgregster](https://community.openenergymonitor.org/u/bgregster)\ **Replies:** 3\ **Last updated:** [4 September 2020 19:41 UTC](https://community.openenergymonitor.org/t/monitoring-solar-electricity-with-2-phases/15297 "2020-09-04T19:41:48Z")
Hi, I am using 2 of my 3 phases and one of them is connected to my solar array. To help me buy the right kit, can someone confirm for me these assumptions - the solar monitoring kit will give me: Monitoring of phase … --- ## [Proposed 3 Phase design](https://community.openenergymonitor.org/t/proposed-3-phase-design/14998)
**Author:** [@DavidSkilton](https://community.openenergymonitor.org/u/DavidSkilton)\ **Replies:** 2\ **Last updated:** [7 August 2020 04:30 UTC](https://community.openenergymonitor.org/t/proposed-3-phase-design/14998 "2020-08-07T04:30:17Z")
I would like to design a 3 phase design to measure the energy flow from the solar inverter, the grid and the consumption of the house. I would like to measure the voltage on each phase for accuracy, as well as the single… --- ## [CT coils on Bus Bar](https://community.openenergymonitor.org/t/ct-coils-on-bus-bar/14375)
**Author:** [@Patd37](https://community.openenergymonitor.org/u/Patd37)\ **Replies:** 24\ **Last updated:** [12 July 2020 15:40 UTC](https://community.openenergymonitor.org/t/ct-coils-on-bus-bar/14375 "2020-07-12T15:40:02Z")
Hi, I have been running an emontx and emonbase since 2017. I monitor the electricity consumption in two circuits max 200amp and pv generation 49kw. It is a 3 phase installation and I have been monitoring only one phase… --- ## [Would like to clarify few questions before purchasing](https://community.openenergymonitor.org/t/would-like-to-clarify-few-questions-before-purchasing/14447)
**Author:** [@Vitaliy\_6](https://community.openenergymonitor.org/u/Vitaliy_6)\ **Replies:** 1\ **Last updated:** [10 June 2020 22:29 UTC](https://community.openenergymonitor.org/t/would-like-to-clarify-few-questions-before-purchasing/14447 "2020-06-10T22:29:56Z")
Hello! Thank you for this great project. I’m planning on setting up power monitoring in my house. I’m located in the US and I have a 3phase power supply(208y/120) so that means I’d need 3 CT sensors. It looks like emonT… --- ## [What would optimal 3-Phase setup be?](https://community.openenergymonitor.org/t/what-would-optimal-3-phase-setup-be/13137)
**Author:** [@rthorntn](https://community.openenergymonitor.org/u/rthorntn)\ **Replies:** 3\ **Last updated:** [28 January 2020 22:39 UTC](https://community.openenergymonitor.org/t/what-would-optimal-3-phase-setup-be/13137 "2020-01-28T22:39:41Z")
Hi, I currently have emonPi monitoring my grid and solar and love it, a big shout out to all the people that have contributed to OpenEnergyMonitor! I’m moving to 3-phase (and probably battery storage) and I want to imp… --- ## [Can't connect to emonESP wi-fi when baud rate is 9600 bps](https://community.openenergymonitor.org/t/cant-connect-to-emonesp-wi-fi-when-baud-rate-is-9600-bps/12409)
**Author:** [@MarcioPaiva](https://community.openenergymonitor.org/u/MarcioPaiva)\ **Replies:** 0\ **Last updated:** [8 November 2019 16:49 UTC](https://community.openenergymonitor.org/t/cant-connect-to-emonesp-wi-fi-when-baud-rate-is-9600-bps/12409 "2019-11-08T16:49:00Z")
Hi, I have an emonESP with a firmware set to 9600 baud rate because I have the 3-phase sketch on my EmonTx. When I try to connect to the emonESP for the first time to start the config, the device keeps trying to connect… --- ## [Monitor 3-phase energy flow using single emonpi](https://community.openenergymonitor.org/t/monitor-3-phase-energy-flow-using-single-emonpi/10803)
**Author:** [@technostark](https://community.openenergymonitor.org/u/technostark)\ **Replies:** 2\ **Last updated:** [30 April 2019 13:05 UTC](https://community.openenergymonitor.org/t/monitor-3-phase-energy-flow-using-single-emonpi/10803 "2019-04-30T13:05:28Z")
Hello all, I currently possess an emonpi with 2 ct sensors. In my current set up,I have a 3kW solar panel set up which is grid connected. I wanted to know if I can use an expansion board to allow for one more ct senso… --- ## [Measuring 3 phase voltage, current and cos Phi in a 800 Ampere 400 V system](https://community.openenergymonitor.org/t/measuring-3-phase-voltage-current-and-cos-phi-in-a-800-ampere-400-v-system/10717)
**Author:** [@SoftSol](https://community.openenergymonitor.org/u/SoftSol)\ **Replies:** 1\ **Last updated:** [19 April 2019 11:41 UTC](https://community.openenergymonitor.org/t/measuring-3-phase-voltage-current-and-cos-phi-in-a-800-ampere-400-v-system/10717 "2019-04-19T11:41:19Z")
In the first phase I need to measure the current and voltage and cos phi in a factory. The used current now is between 500 and 800 Amps. I need that data in a Siemens scada system. Next phase is programming in Python a R… --- ## [Newbie: Advice please on 3 phase solar generation and consumption setups](https://community.openenergymonitor.org/t/newbie-advice-please-on-3-phase-solar-generation-and-consumption-setups/10387)
**Author:** [@philrob](https://community.openenergymonitor.org/u/philrob)\ **Replies:** 0\ **Last updated:** [14 March 2019 13:52 UTC](https://community.openenergymonitor.org/t/newbie-advice-please-on-3-phase-solar-generation-and-consumption-setups/10387 "2019-03-14T13:52:37Z")
Thanks in advance for your patience, having searched the forums and looked at the shop I am unsure what I need. Desired outcome: Monitor Solar Generation Monitor Imported Power Monitor Total Consumption Setup: My 3-… --- ## [Newbie. Advice sought regarding most suitable equipment to match 3 phase setup in UK](https://community.openenergymonitor.org/t/newbie-advice-sought-regarding-most-suitable-equipment-to-match-3-phase-setup-in-uk/10310)
**Author:** [@thomasario](https://community.openenergymonitor.org/u/thomasario)\ **Replies:** 8\ **Last updated:** [13 March 2019 14:43 UTC](https://community.openenergymonitor.org/t/newbie-advice-sought-regarding-most-suitable-equipment-to-match-3-phase-setup-in-uk/10310 "2019-03-13T14:43:01Z")
Hello all and thanks for taking the time to read my post. Apologies, if I’m asking questions covered elsewhere – but I think my setup is at least a little different to the norm to warrant a new post. Feel free to hurl ab… --- ## [3 phase 3 wire voltage meaurement](https://community.openenergymonitor.org/t/3-phase-3-wire-voltage-meaurement/10350)
**Author:** [@ajitnayak87](https://community.openenergymonitor.org/u/ajitnayak87)\ **Replies:** 2\ **Last updated:** [8 March 2019 14:57 UTC](https://community.openenergymonitor.org/t/3-phase-3-wire-voltage-meaurement/10350 "2019-03-08T14:57:24Z")
Dear all, I am trying to build 3 phase voltmeter that could measure L-L and L-N voltage during 3 phase 3 wire and 3 phase 4 wire connection. 3 phase 3 wire and 3 phase 4 wire connection are external connection. as we k… --- ## [Temperature value](https://community.openenergymonitor.org/t/temperature-value/10048)
**Author:** [@Tony](https://community.openenergymonitor.org/u/Tony)\ **Replies:** 14\ **Last updated:** [11 February 2019 22:47 UTC](https://community.openenergymonitor.org/t/temperature-value/10048 "2019-02-11T22:47:54Z")
I’m just purchased a RJ45 Encapsulated DS18B20 for my emonTx (running the 3-phase sketch) I plugged it in and it’s generally giving weird high values. The room it is in is warm, about 24, but the sensor is reporting arou… --- ## [CT Sensor connection validation](https://community.openenergymonitor.org/t/ct-sensor-connection-validation/9044)
**Author:** [@Tony](https://community.openenergymonitor.org/u/Tony)\ **Replies:** 9\ **Last updated:** [23 November 2018 12:47 UTC](https://community.openenergymonitor.org/t/ct-sensor-connection-validation/9044 "2018-11-23T12:47:03Z")
Hello all, Newbie and first time poster to the forum and I’m soo not technical. We’ve had a emonPi connected to a couple of emonTHs for the last couple of months (all out of the box configuration), but I’ve just moved t… --- ## [Using CTs with three phases](https://community.openenergymonitor.org/t/using-cts-with-three-phases/7033)
**Author:** [@Beardmann](https://community.openenergymonitor.org/u/Beardmann)\ **Replies:** 33\ **Last updated:** [24 July 2018 21:56 UTC](https://community.openenergymonitor.org/t/using-cts-with-three-phases/7033 "2018-07-24T21:56:45Z")
Hello there, I have just received my emonPi, and I am trying to set it up with the CT clamps, but I already ran into som questions :slight\_smile: I have created this drawing to make it easier to understand… I’m not an… --- ## [Need help to setup EmonTX 3 Phase based monitoring](https://community.openenergymonitor.org/t/need-help-to-setup-emontx-3-phase-based-monitoring/4688)
**Author:** [@WickedWicket](https://community.openenergymonitor.org/u/WickedWicket)\ **Replies:** 4\ **Last updated:** [30 July 2017 08:25 UTC](https://community.openenergymonitor.org/t/need-help-to-setup-emontx-3-phase-based-monitoring/4688 "2017-07-30T08:25:32Z")
Hi, First of all, thanks for all the nice Open Source hardware and software. In order to discover the energy monitoring universe, I have recently bought the following components 1 x emonPi 1 x emonTx V3 2 x emonTH V2 … --- ## [emonTx 3 phase setup (Apparent power)](https://community.openenergymonitor.org/t/emontx-3-phase-setup-apparent-power/4413)
**Author:** [@Juliofitipaldo](https://community.openenergymonitor.org/u/Juliofitipaldo)\ **Replies:** 5\ **Last updated:** [26 June 2017 18:26 UTC](https://community.openenergymonitor.org/t/emontx-3-phase-setup-apparent-power/4413 "2017-06-26T18:26:03Z")
Hi! I hope somebody can help me, I am a bit lost. I want to measure apparent power at home. Most of my loads are resistive, and I can live with a 10% error on the measurement. I have a 220V phase to phase voltage, and… --- ## [Measurement of 3 phase power as in most of Europe](https://community.openenergymonitor.org/t/measurement-of-3-phase-power-as-in-most-of-europe/3781)
**Author:** [@Bielefeldt](https://community.openenergymonitor.org/u/Bielefeldt)\ **Replies:** 7\ **Last updated:** [11 May 2017 17:05 UTC](https://community.openenergymonitor.org/t/measurement-of-3-phase-power-as-in-most-of-europe/3781 "2017-05-11T17:05:38Z")
\*\* Measurement of 3 phase power as in most of Europe \*\* In large parts of Europe, 3-phase power supply is used in ordinary households. Unfortunately, OpenEnergyMonitor does not have a device that can handle this by de… [Next page](https://community.openenergymonitor.org/tag/3-phase/81.md?match_all_tags=true&page=1&tags%5B%5D=3-phase)