Clarification on CT Clamp Sensor Input Assignments for Split-Phase Monitoring

[ironbill]

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.

[admin]

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.

[uslackr]

I have a similar panel with 15 circuits on each phase.
1) How can I make best of use of the m30 to manage all 30 circuits with only two phases?

2) for 220v circuits, the breaker will actually attach across both legs. in this case should the each clamp be wired to the chip supporting that leg?

3) what is the implication in accuracy of a clamp is reporting to the chip not supported by that phase?

Thank you

\\Greg

[admin]

15 channel single phase monitor use by 15 CT clamp sensors.
CT clamp sensor go through by ONLY one leg (LIVE line).