Compensated Cb Status; General Logic - ABB RELION 630 Series Technical Manual

Section 7
Power management functions
7.4.4.3
7.4.4.4
220

Compensated CB status

This module calculates the compensated circuit breaker status by considering the
circuit breaker position, circuit breaker in service/test status and IED data quality of
the power source.
The conditions to set the compensated circuit breaker status as TRUE.
• The input CB_POSITION (power source circuit breaker position) is "Close".
• The input CB_SERVICE (power source circuit breaker in service) is TRUE.
• The input CB_LOCK_OUT (Protection lockout operation status of power source)
is FALSE.
• The input CB_IED_QVAL is "Good".
If one or more of the above conditions are not met, compensated circuit breaker status
is FALSE.
If the load-shedding blocking status is activated due to bad IED data quality and the
Block override setting is "Quality bad CB open", then compensated CB status is
FALSE.
If the load-shedding blocking status is activated due to bad IED data quality and the
Block override setting is "Quality bad CB close", the output compensated CB status
is TRUE.
If the calculated compensated CB status is TRUE, the output CB_COMPS_POS is
"Close", else the output CB_COMPS_POS is "Open".
The calculated compensated circuit breaker status is reported to the Binary to integer
module.

General logic

This module calculates FLS_BLOCK output, BLK_BYPASS output and island
parallel status based on various conditions.
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.
1MRS757256 F
PML630/Compact Load-Shedding Solution
Technical Manual