W
whit3rd
Guest
On Oct 21, 11:59 pm, JosephKK <quiettechb...@yahoo.com> wrote:
is linear over 4 orders of magnitude, and is much less expensive.
My intent was to put a low-current sensor (the current transformer,
of an inexpensive size and no great capacity) in series with a
high current sensor so as to make a low-Z current sense
array with two gain ranges.
Two resistors won't do it. A high-current transformer (my 800A
example here weighs about 2 kg) is expensive. A low-current
transformer, which drops out of the circuit when it saturates,
seemed suitable.
Note, however, that the simple copper sense resistor alsoOn Mon, 20 Oct 2008 19:21:15 -0700 (PDT), whit3rd <whit...@gmail.com
wrote:
The trick is, your current-transformer will saturate (like, at 50 mA)
so the series resistance on its secondary is no longer in-circuit
when the power is high.
You do not seem know or understand squat about current transformers.
They are normally linear over 3 to 4 orders of magnitude, and can be
really fast
is linear over 4 orders of magnitude, and is much less expensive.
My intent was to put a low-current sensor (the current transformer,
of an inexpensive size and no great capacity) in series with a
high current sensor so as to make a low-Z current sense
array with two gain ranges.
Two resistors won't do it. A high-current transformer (my 800A
example here weighs about 2 kg) is expensive. A low-current
transformer, which drops out of the circuit when it saturates,
seemed suitable.