Before every switch-on procedure and during operation a fully automatic verification is performed in order to check the correct supply conditions.
The classic “test button” is eliminated.
Failure situations like external voltage on the PE conductor or fault current above rated values cause a interruption of L and N. The PE conductor stays closed and keeps being monitored !
The PE conductor circuit is switched on in advance and switched off with a delay.
Undervoltage will be recognized and the PRCD-S+ switches off.
The LED signal unit (red/green) visualizes error situations and offers a permanent status indication.
The PRCD-S+ from PCE is very handy and light weight, much simpler in comparison to an isolation transformer and cheaper in acquisition and usage.