brennenstuhl BDI-S 2 30 Notice D'utilisation page 9

Note:
From time to time, carry out a function test,
press the Test button and perform the procedure
described above.
After a power cut, switch on the safety plug again.
The safety plug is not suitable for appliances
which may give rise to consequential damage if
disconnected from the power supply for a
prolonged period of time (e.g. refrigerators,
freezers, etc.).
This safety plug does not eliminate the need for
other essential protective measures.
Technical data