ABB RELION 630 Series Technical Manual page 227

1MRS757256 F
PML630/Compact Load-Shedding Solution
Technical Manual
Table 268: Calculation of the FLS_BLOCK and BLK_BYPASS outputs
Load-shedding blocking Block override setting
conditions
IED_TST_MODE = IED test mode
TRUE All yes
No
Quality bad CB close
Quality bad CB open
CB Interm or invalid
CB_IED_QVAL = Bad Quality bad CB close
Quality bad CB Open
All yes
No
IED test mode
CB Interm or invalid
CB_POSITION = CB Interm or invalid
Intermediate or Invalid All yes
No
IED test mode
Quality bad CB close
Quality bad CB open
If mutiple load- All yes
shedding blocking
CB Interm or invalid
signals are active
IED test mode
simultaneously
Quality bad CB close
(IED_TST_MODE =
Quality bad CB open
TRUE, CB_IED_QVAL
= Bad, CB_POSITION
No
= Intermediate or
Invalid)
The Block override setting is preferred to be kept as "No".
If the input ISLAND_PARAL is "Parallel" and the compensated circuit breaker status
is TRUE, the output ISLND_PARALL is "Parallel", else the output ISLND_PARALL
is "Island".
For generator, the output ISLND_PARALL remains "Island".
The output B_SET_CHANGE remains active for 500 ms if one or more basic settings
are changed (See Table 273
B_SET_CHANGE is FALSE.
The General logic module provides the FLS_BLOCK (load-shedding blocking),
ISLND_PARALL (island or parallel mode) and CB_COMPS_POS (compensated
circuit breaker status) signals to the Binary to integer module.
Power management functions
BLK_BYPASS output
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
TRUE
FALSE
and Table 275). After 500 ms, the output
Section 7
FLS_BLOCK output
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
TRUE
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