Troubleshooting; Safety Instructions; List Of Faults And Corrective Actions; Useful Leds On The Ieds And Switches - ABB RELION REB500 Operation Manual

1MRK 500 132-UUS Rev. B
Section 7
7.1

Safety Instructions

7.2

List of faults and corrective actions

7.2.1

Useful LEDs on the IEDs and switches

7.2.1.1

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.
IEC18000552 V1 EN-US
Figure 73:
7.2.1.2

Bay Units/ Central Unit

Front side
The Normal 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
Distributed busbar protection REB500
Operation manual

Troubleshooting

All work on the REB500 busbar protection system must be carefully planned. Errors
when manipulating the system cannot only destroy components, they can also cause
false tripping and serious interruption to the power supply.
Precautions must be taken in the immediate area when working on the central unit or
one of the bay units to exclude any possibility of persons coming into contact with live
parts.
A danger of electrical shock also exists when measuring currents and voltages.
When replacing electronic modules, take the necessary precautions to prevent damage
to components due to electrostatic discharge (ESD).
LED Indication on the back side of the switch
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14000041-IEC18000552-1-en.vsdx
Section 5.3.3 and Section
Section 7
Troubleshooting
GUID-7C84B9F2-85E4-44F5-B421-E954E20B3CDD v1
GUID-BD3EEF26-E183-46AA-9591-278F8534681A v1
GUID-903E1497-5F85-456D-BC9A-43DC43DC3AF3 v1
GUID-E0D7C074-CD55-49F6-BCEC-8FFE2682006A v3
5.3.6).
97