ABB RELION 630 Series Technical Manual page 263

1MRS757256 F
Table 294: Calculation of FLS_BLOCK and BLK_BYPASS outputs for bus coupler configuration
CB Configuration Load-shedding blocking conditions
setting
Bus coupler SND_IED_TEST = TRUE
Bus coupler SND_IED_QVAL = Bad
Bus coupler SND_CB_POS = Intermediate or Invalid
Bus coupler If multiple load-shedding blocking signals
(SND_IED_TEST = TRUE , SND_IED_QVAL =
Bad, SND_CB_POS = Intermediate or Invalid)
are active simultaneously
Table 295: Calculation of FLS_BLOCK and BLK_BYPASS outputs for tie breaker configuration
CB Configuration Load-shedding blocking conditions
setting
Tie breaker SND_IED_TEST = TRUE
RCV_IED_TEST = TRUE
Tie breaker SND_IED_QVAL = Bad
RCV_IED_QVAL = Bad
Table continues on next page
PML630/Compact Load-Shedding Solution
Technical Manual
The FLS_BLOCK output provides the load-shedding blocking signal after
considering the override action using the Block override setting. The BLK_BYPASS
output indicates the successful overridden action of the load-shedding blocking
signal.
Power management functions
Block override setting BLK_BYPASS
output
IED test mode TRUE
All yes
No FALSE
Quality bad CB close
Quality bad CB open
CB Interm or invalid
Quality bad CB close TRUE
Quality bad CB Open
All yes
No FALSE
IED test mode
CB Interm or invalid
CB Interm or invalid TRUE
All yes
No FALSE
IED test mode
Quality bad CB close
Quality bad CB open
All yes TRUE
CB Interm or invalid TRUE
IED test mode
Quality bad CB close
Quality bad CB open
No FALSE
Block override setting BLK_BYPASS
output
IED test mode TRUE
All yes"
No FALSE
Quality bad CB close
Quality bad CB open
CB Interm or invalid"
Quality bad CB close TRUE
Quality bad CB Open
All yes
No FALSE
IED test mode
CB Interm or invalid
Section 7
FLS_BLOCK output
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
TRUE
FLS_BLOCK output
FALSE
TRUE
FALSE
TRUE
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