These YHDC mini current transformers can measure current up to 80A, and fit around wires that are up to 10mm in diameter. They are only 2.3 x 2.6 x 4cm. and have custom 3.5mm jacks which plug directly into our power meters. A TVS diode is built in for safety, and to prevent open circuiting. The output is 26.6mA, when the current is 80A.
These are highly recommended if you are monitoring a lot of individual higher amperage circuits in a panel ,and do not have a lot of space. These are in-between the size of the SCT006 and SCT013.
Colin Berg (verified owner) –
I calibrated 3 of these using a power injector (highly accurate power generator). These are the gains calibrations I got for my ESPhome settings.
CT number 1. gain_ct: 41840. At 240v 5A, the CT read 4.998A
CT number 2. gain_ct: 42150
CT number 3. gain_ct: 42050