ABB Relion 630 Series Operation Manual page 60

Section 4
Using the HMI
52
GUID-AF6B6700-7E4F-4CE2-B29A-D0E978E2C910 V2 EN
Figure 38: Load shed core settings
NCBDCSWI: Network circuit breakers, bus coupler and tie breakers settings.
• Block Override to bypass load shed block: Block override (No/IED in
test/Quality bad CB close/Quality bad CB Open/CB Position/All Yes)
The default setting for the parameter 'Block override' is 'No', so
the load shed function is blocked when network circuit breaker
IED is in test mode or quality of data is bad or if circuit breaker
position is intermediate or invalid.
The parameter setting 'All Yes' bypasses the load shed function
blocking irrespective of blocking condition.
1MRS757183 F
PML630/Compact Load-Shedding Solution
Operation Manual