During an eicr I have come across a wylex wrds  40/2 BS EN 61008 (RCD) Residual Current Device on a board for the solar inverter.

The diagram on the side seems to suggest it has contacts that disconnect the test button.also it does not seem to be marked in/out,line/load or arrows.

Would this mean that it's bi directional?

Also the BS EN 60898 mcb an nhxb20 is this bi directional?

Or should I just contact electrium