Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
399
Description of front panel view
Display elements
"Ready" signals and alarms
● "Ready" signal of the residual current device:
The LED labeled "ACT" stands for ACTIVE and lights up when the residual current device
is ready.
● Pre-alarm:
Both the Basic RCD310 and the Basic RCD510 feature an alarm LED labeled "AL" (pre-
alarm) which lights up promptly to indicate potential shutdown of the installation due to
residual current.
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