Categories, types and types of RCDs - what are the differences, what are they for

Good afternoon, are you definitely not mistaken? Neither I nor even Google knows. DM and DE - this is found in the names of models of individual manufacturers. But RCDs are of different types in terms of leakage current, for example, RCD type A - for constant (pulsating) and alternating, AC - for alternating leakage current and type B - for alternating, direct or rectified current leaks. There is also an RCD of type S - selective, i.e. are triggered with a time delay of 0.15-0.5 seconds, and type G - also selective, but with a longer exposure - 0.6-0.8 seconds.

There are other types, for example AP-R, type F, but they are modifications of the above types, for example, like F - it's almost like type A, only taking into account different frequencies of currents leaks for consumers with a frequency converter (such as modern household appliances with an inverter drive) or AP-R with a response delay slightly less than selective.

Another classification according to the dependence on the power source is electromechanical, for which the presence of both phase and zero is not necessary, i.e. independent from the power source and electronic - which are dependent on the power source (read how - will not work when burned out zero).

Unfortunately, I don't know about other gradations (or I just forgot).