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+--- Thread: N60/N30/N20/N10/M30 CT selection and Load MAX current formula (/showthread.php?tid=8604)
N60/N30/N20/N10/M30 CT selection and Load MAX current formula - admin - 09-03-2025
every CT clamp input channel will have two resistance. for example, CT2 channel are R23, R24
use the formula let input voltage <700mV
if your CT clamp sensor is 2000:1
Load current=30A,
input voltage = 5.1R*2*30A/2000=153mA (VIPN)
so if input voltage <700mA , use 5.1R resistance on PCB, 2000:1 MAX can detect 137A AC220V load.
if you want support more large current, you can change the resistance or change CT 2000:1 with other models. Just use by the formula.
RE: N60/N30/N20/N10/M30 CT selection and Load MAX current formula - SharkBait - 12-21-2025
Hi,
I think you have an error on your product page for the DL-CT03CL2.0 current transformer.
https://shop.kincony.com/products/25a-current-transformer-for-kincony-m30-m16-energy-meter-board?_pos=2&_psq=ct&_ss=e&_v=1.0
You list it as rated 0-25A, but the DL-CT03CL2.0 product information says it is rated for 0-5A? This is confusing, I would like a CT that can measure 10-20A 230V subcircuits with the N20.
Thanks
RE: N60/N30/N20/N10/M30 CT selection and Load MAX current formula - admin - 12-21-2025
"DL-CT03CL2.0 product information says it is rated for 0-5A? " where ? take a photo.
RE: N60/N30/N20/N10/M30 CT selection and Load MAX current formula - SharkBait - 12-22-2025
(12-21-2025, 01:33 PM)admin Wrote: "DL-CT03CL2.0 product information says it is rated for 0-5A? " where ? take a photo.
My apologies, I had this wrong. The CT is good for up to 25A as you have described. The quoted accuracy and tolerance is "rated" at 5A, but the CT can handle higher currents. Please disregard my last comment, thank you!