System Response; System Response To A Differential Current Alarm; System Response To An Isolator Alarm - ABB RELION REB500 Operation Manual

1MRK 505 400-UEN B
VT connection:
Primary voltage:
Secondary voltage:
Scaling factor:
IEC18000463 V1 EN-US
Figure 5:
4.5

System response

System response in the Settings menu opens a dialog box that provides a choice of how the
system should react to differential current alarms and to isolator alarms.
Details of the differential current supervision and isolator status supervision systems are
provided in the
4.5.1

System response to a differential current alarm

• Continue in operation: The busbar protection continues to function.
• Block busbar protection: Operation of the entire busbar protection is blocked.
• Selective block busbar protection (preferred): Operation of the busbar protection is only
blocked for the section of busbar (protection zone) concerned.
Setting the response to Block is more likely to cause a failure to trip and to Continue in
operation a maloperation.
4.5.2

System response to an isolator alarm

• Continue in operation: The busbar protection continues to function.
• Block busbar protection and Intertripping: Operation of the busbar protection and
intertripping scheme is blocked throughout the system.
• Selective block busbar protection and Intertripping (preferred): The busbar protection
and intertripping are only blocked for the section of busbar (protection zone) concerned.
Distributed busbar protection REB500
Technical manual
Settings/Voltage transformers - Details
Application Manual .
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3 phases_star
220,000 V
100 V
1.1
14000025-IEC18000463-1-en.vsdx
GUID-61266679-9F29-40B1-8891-11E36499366E v1
GUID-02718967-6820-4C50-B247-41A5B9531A31 v1
GUID-5D570F19-3095-41FB-815A-588D58117A30 v1
Section 4
System settings
33