I'm presently having a similar problem, test button doesn't make the RCCD to operate, even after changing for a brand new. It is not for a home installation, it's for a service box we provide to industrial European customers for them to safely test our current inverters.
RCCD internal test circuit is (I assume) simply a switch in series with a resistor of a proper value to give to right leakeage current to make the device trip.
I really suspected the test button or trip setting inadequate, so I made a simple test setup.
My RCCD is a 25A, 30mA, 230/415V.
I first tried to test it at 208V, 3ph, as it is a common voltage in Canada.
Doesn't trip at all. So, is it possible that the current is just below the one that could trip the device as my voltage is lower?
Used my 3ph variac to raise it to 260V, yet it doesn't trip.
So I put a resistor with a value to bring a leakage just below the 30mA required to trip, so a 10ko to bring it to 24mA @ 240V, between the phase where test button connects and to neutral.
Power it up, no trip, hit the trip button, it trips.
So here is the proof the device works as intended BUT test button trip setting (internal R value) is inadequate, thus not working.
I'm just wondering now if I try to be refounded by the German manufacturer of these devices and select another one or I just add a resistor with a proper value and enough wattage to make the whole thing work properly.
The only drawback will be that any small leakage will be detected, i.e. making it very sensitive, but as it is not to put multiple loads like in a home, that will be ok and still safe.
RCCD internal test circuit is (I assume) simply a switch in series with a resistor of a proper value to give to right leakeage current to make the device trip.
I really suspected the test button or trip setting inadequate, so I made a simple test setup.
My RCCD is a 25A, 30mA, 230/415V.
I first tried to test it at 208V, 3ph, as it is a common voltage in Canada.
Doesn't trip at all. So, is it possible that the current is just below the one that could trip the device as my voltage is lower?
Used my 3ph variac to raise it to 260V, yet it doesn't trip.
So I put a resistor with a value to bring a leakage just below the 30mA required to trip, so a 10ko to bring it to 24mA @ 240V, between the phase where test button connects and to neutral.
Power it up, no trip, hit the trip button, it trips.
So here is the proof the device works as intended BUT test button trip setting (internal R value) is inadequate, thus not working.
I'm just wondering now if I try to be refounded by the German manufacturer of these devices and select another one or I just add a resistor with a proper value and enough wattage to make the whole thing work properly.
The only drawback will be that any small leakage will be detected, i.e. making it very sensitive, but as it is not to put multiple loads like in a home, that will be ok and still safe.
