ABB REB500 - 6.2 Faults and Corrective Actions

1MRK 500 124-UEN Section 6
Troubleshooting
Operation Manual 85
Distributed busbar protection REB500
6.2 List of faults and corrective actions
6.2.1 Useful LEDs on the IEDs and switches
The Fault and Power (P) LED of the Switch are found on the left side of the switch.
The green link LED for optical and electrical connection is located on the electrical
connector. The same LEDs are also available on the back side of the switch.
Fig. 6.1 LED Indication on the back side of the switch
The Ready LED is on the top of the BU/CU. The Alarm Indicator LED is located
in the right lower corner of the IED, integrated within the alarm button (see Section
4.3.3 and 4.3.6).