Residual-current-operated protective device

A switching device for disconnecting and switching at least one line, comprising:

• a line-voltage-independent trigger device with a line-voltage-independent electronic trigger element operating a latch that disconnects and switches the at least one line,
• a line-voltage-dependent electronic circuit receiving a voltage from the at least one line and producing a line-voltage-dependent trigger signal,
• wherein the line-voltage-dependent electronic circuit is constructed to supply the line-voltage-dependent trigger signal to the line-voltage-independent trigger device when the received voltage exceeds a presettable threshold value, and
• wherein the trigger signal supplied by the line-voltage-dependent electronic circuit to the line-voltage-independent trigger device is additive to and has a higher power than the line-voltage-independent trigger signal provided by the line-voltage-independent electronic trigger device alone.