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+--- Thread: Clarification on CT Clamp Sensor Input Assignments for Split-Phase Monitoring (/showthread.php?tid=7039)
Clarification on CT Clamp Sensor Input Assignments for Split-Phase Monitoring - ironbill - 11-09-2024
I am configuring the KC868-M30 to monitor a split-phase residential electrical system in the United States, which consists of two hot legs: L1 and L2 with a total of 30 spaces. I seek clarification on the assignment of the 30 CT clamp sensor inputs. Specifically, I would like to know if there is a required mapping between the sensor inputs and the two-phase legs. Should the inputs be organized as follows:
- Inputs 1–10 assigned to Phase A (L1)
- Inputs 11–20 assigned to Phase B (L2)
- Inputs 21–30 left unassigned or used for other purposes
Or is it permissible to connect the CT clamps to any input channel, regardless of the phase they are monitoring, as long as the configuration in the software accurately reflects the phase association for each input?
Understanding the correct procedure is crucial for ensuring accurate phase identification and power calculations. Your guidance on this matter would be greatly appreciated.
Thank you for your assistance.
RE: Clarification on CT Clamp Sensor Input Assignments for Split-Phase Monitoring - admin - 11-11-2024
Yes, you are right. M30 use 3pcs of BL0910 energy chip. every chip manager 10 CT sensors and one VOLTAGE input.
so one chip calculate the power and energy by VOLTAGE and CT current.
so you use "Inputs 1–10 assigned to Phase A (L1)" is correct.
for example, not use CT1 with L2, CT1 MUST work with L1, so that the power and energy data is correct.