How to connect an RCD so that it does not burn out

Now difavtomats are used in full swing, and once they were a wonder, but what has not changed over time is their high cost. Therefore, it will cost a pretty penny to burn such a machine gun, here, the main thing is to use a simple rule, and this will not happen.

Incorrect connection

There is such a problem, this is when the input is connected from below, and not from above, you say, no one will connect like that, but no, such an error occurs. The most interesting thing here is that with such a connection, the RCD will work until you turn on the "Test" button, which should simulate the leakage current.

It is recommended to test the device according to the passport once a month, and when connecting it it is recommended to press it to check.

So, with incorrect connection and pressing the test, there is a high probability that the RCD will fail, a small smoke with a characteristic smell will go. I must say right away that this problem is more likely to relate to an electronic RCD

, and this does not threaten the electromechanical. Therefore, in any case, it is better to connect immediately correctly.

Correct connection

With the correct connection, the power supply to the device comes from the top, and the protected line is connected to the lower terminals.

Now you can safely test with the "test" button, checking the efficiency of the differential protection. In this case, I simply described the existing problem, to warn inexperienced craftsmen, but did not get to the bottom of it. If there are electricians who have found out the reason, please describe it in the comments.