Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
453
Description of front panel view
Display elements
"Ready" signals, communication status and alarms
● "Ready" signal of the residual current device:
The LED labeled "ACT"
① stands for ACTIVE and lights up when the device is ready to
operate.
● Communication status:
The LED labeled "COM"
② stands for COMMUNICATION and indicates the
communication status of the residual current device.
● Pre-alarms:
The Advanced RCD820 has two LEDs labeled "AL1" (ALARM 1)
③ and "AL2" (ALARM
2)
③ which light up successively or simultaneously to promptly indicate potential
shutdown of the installation due to residual current.
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