I have posted a piece here which is also on the TT topic, but is more general and I think a new thread would be better. Your voice is heard. See below.
. . .On another note my playing with RCDs is still proving interesting, and I am not at all convinced that an RCD with a high fixed load still trips at 30mA or whatever, particularly if the waveform is not ideal. Perhaps there is more to this than meets the eye.
My understanding is that once you are over the rated current of an RCD by a certain amount, you may magnetically saturate the sensing coil, leading to either no operation or operation at a higher than desired current.
. . .On another note my playing with RCDs is still proving interesting, and I am not at all convinced that an RCD with a high fixed load still trips at 30mA or whatever, particularly if the waveform is not ideal. Perhaps there is more to this than meets the eye.
My understanding is that once you are over the rated current of an RCD by a certain amount, you may magnetically saturate the sensing coil, leading to either no operation or operation at a higher than desired current.
