Hi, all. I'm looking for split core current transformers at a reasonable price. This will be for
monitoring circuits in my home.
The Magnelab SCT-400 and SCT-750 series look good because they come in multiple
ratings , and all have the same output (.333V) at max rated amperage. This would greatly
simplify circuit design - changes for different current ratings could be done in software.
But at $45-55 ea., these get pretty expensive pretty quickly. I'd have well over $1K just in the
transformers to monitor each circuit in the house.
I've seen cheaper ones, but their outputs vary significantly. Each circuit would have to be
different; some could get by with just changing the ballast resistor, but others would
require additional changes in the amplifier gain (or loss, as the case may be).
So, does anyone know of a less expensive source of current transformers like Magnelabs?
I'm especially interested in standard home circuit breaker ratings, i.e. 15A, 20A, 30A, 40A,
100A, 150A and 200A.
Or would you just design a circuit for each one and use current transformers with ballast
resisters?
TIA.