# \#sct **URL:** https://community.openenergymonitor.org/tag/sct/131.md [Latest](https://community.openenergymonitor.org/latest.md) · [Categories](https://community.openenergymonitor.org/categories.md) · [Tags](https://community.openenergymonitor.org/tags.md) --- ## [EmonLib.h with Arduino Mega 2560](https://community.openenergymonitor.org/t/emonlib-h-with-arduino-mega-2560/28690)
**Author:** [@Christophorus\_Elgi\_N](https://community.openenergymonitor.org/u/Christophorus_Elgi_N)\ **Replies:** 2\ **Last updated:** [3 June 2025 06:24 UTC](https://community.openenergymonitor.org/t/emonlib-h-with-arduino-mega-2560/28690 "2025-06-03T06:24:47Z")
hi I’m a new member in this forum and I’m building my own power monitoring device using Emonlib.h, 1x Arduino Mega 2560, SCT019, and ZMPT101B with 3 phase electricity star configuration. In the experimental test that I h… --- ## [Does open-circuited also include the scenario wherein the arduino is powered off?](https://community.openenergymonitor.org/t/does-open-circuited-also-include-the-scenario-wherein-the-arduino-is-powered-off/24126)
**Author:** [@sujaldev](https://community.openenergymonitor.org/u/sujaldev)\ **Replies:** 4\ **Last updated:** [10 August 2023 18:05 UTC](https://community.openenergymonitor.org/t/does-open-circuited-also-include-the-scenario-wherein-the-arduino-is-powered-off/24126 "2023-08-10T18:05:28Z")
In this circuit, there is a warning about not having the CT be open-circuited, but I’m confused as to whether that also includes the scenario wherein the arduino is powered off but the rest of the circuit is connected as… --- ## [Ordered SCT-013-000 but received SCT-013-000V](https://community.openenergymonitor.org/t/ordered-sct-013-000-but-received-sct-013-000v/18685)
**Author:** [@JackHawkins](https://community.openenergymonitor.org/u/JackHawkins)\ **Replies:** 7\ **Last updated:** [24 December 2022 00:49 UTC](https://community.openenergymonitor.org/t/ordered-sct-013-000-but-received-sct-013-000v/18685 "2022-12-24T00:49:49Z")
I recently ordered the SCT-013-000 but received SCT-013-000V by mistake. From the product range I see this is the difference: SCT-013-000 Primary AC current: 100A Secondary current: 50mA SCT-013-000V Primary AC cu… --- ## [Using an SCT-013 to calculate "low overhead" instantaneous power monitoring, is this method missing something?](https://community.openenergymonitor.org/t/using-an-sct-013-to-calculate-low-overhead-instantaneous-power-monitoring-is-this-method-missing-something/14732)
**Author:** [@jonpcar](https://community.openenergymonitor.org/u/jonpcar)\ **Replies:** 70\ **Last updated:** [28 July 2020 22:17 UTC](https://community.openenergymonitor.org/t/using-an-sct-013-to-calculate-low-overhead-instantaneous-power-monitoring-is-this-method-missing-something/14732 "2020-07-28T22:17:27Z")
Hi, first time poster. I’m working on a pool controller project, based on a particle.io photon (Arduino-like). I am currently adding “power monitoring” for my pool filter pump and Stenner pumps, which are pumps that ad… --- ## [Question about SCT probes](https://community.openenergymonitor.org/t/question-about-sct-probes/13779)
**Author:** [@favy086](https://community.openenergymonitor.org/u/favy086)\ **Replies:** 1\ **Last updated:** [7 April 2020 11:50 UTC](https://community.openenergymonitor.org/t/question-about-sct-probes/13779 "2020-04-07T11:50:57Z")
Hello guys, please forgive me if my question is not meant to be here. I’ve read a lot about SCT-013-000 probes and I happened to have a SCT-013-030 (the 30A model with the burden resistor built in) and all seems to work … --- ## [Minimal current measured with CTs within acceptable error](https://community.openenergymonitor.org/t/minimal-current-measured-with-cts-within-acceptable-error/8389)
**Author:** [@NPL](https://community.openenergymonitor.org/u/NPL)\ **Replies:** 18\ **Last updated:** [11 December 2018 14:22 UTC](https://community.openenergymonitor.org/t/minimal-current-measured-with-cts-within-acceptable-error/8389 "2018-12-11T14:22:03Z")
Hi everyone, I’ve been following the OEM story for a few years now as I’m really impressed for all the work done so far. I’ve been working in the energy monitoring sector (as a consultant) for 8 years now and would lik… --- ## [600a sct For Sale](https://community.openenergymonitor.org/t/600a-sct-for-sale/973)
**Author:** [@dafyddhirst](https://community.openenergymonitor.org/u/dafyddhirst)\ **Replies:** 0\ **Last updated:** [13 July 2016 16:01 UTC](https://community.openenergymonitor.org/t/600a-sct-for-sale/973 "2016-07-13T16:01:38Z")
I have a number NEW 600A 100mA 0.5% Split coil transformers left over from an order . They all have an extra long 2 M Cable on them. I am asking for 25 quid each on ebay for them Link below. I have been using these now…