Load Busbar Command - ABB RELION 630 Series Technical Manual

Section 7
Power management functions
7.8.4.9
294
The FLS_START output is TRUE if any of the condition is true.
• FLS_TRG_SNW1 is active.
• FLS_TRG_SNW2 is active.
• FLS_TRG_SNW3 is active.
• FLS_TRG_SNW4 is active.
If the above conditions are not true, the FLS_START output is FALSE.
If the slow load start for power sources is active, the SLS_START output is TRUE else
the SLS_START output is FALSE.
The LS_START output is TRUE if any of the condition is satisfied.
• If the FLS_START output is TRUE
• If the SLS_START output is TRUE
• If EXTD_TRG_SNW1 is active or EXTD_TRG_SNW2 is active or
EXTD_TRG_SNW3 is active or EXTD_TRG_SNW4 is active
If the above conditions are not true, the LS_START output is FALSE.
If LS_OPR_STS is fast load-shed, FLS_OPERATE output is TRUE.
z
If LS_OPR_STS is slow load-shed, SLS_OPERATE output is TRUE.
z
If LS_OPR_STS is fast load-shed or slow load-shed or manual load-shed or
z
extended load-shed, LS_OPERATE output is TRUE.
The B_SET_CHANGE output indicates the change in the Block override setting from
one value to another value by the operator. The B_SET_CHANGE output is TRUE for
500 ms from the time of change. After 500 ms has elapsed, the B_SET_CHANGE
output is FALSE.

Load busbar command

This module calculates the load-shedding operation information for the sheddable
loads of each busbar. Based on the load-shedding priority calculated for the
subnetwork, the load-shedding operation is activated for sheddable loads in the
corresponding busbar of the subnetwork.
If the set priority of the sheddable load is less than or equal to the load-shedding
priority, the load-shedding operation for the corresponding sheddable load is
activated.
The load-shedding operation command for different busbars is provided by the
LS_OPR_BB1, LS_OPR_BB2, LS_OPR_BB3, LS_OPR_BB4, LS_OPR_BB5 and
LS_OPR_BB6 outputs.
1MRS757256 F
PML630/Compact Load-Shedding Solution
Technical Manual