Sel 411L - Figure 4.21 Synchronism-Check Settings; Figure 4.22 Synchronism-Check Relay Word Bits

P.4.51
Date Code 20151029 Protection Manual SEL-411L Relay
Autoreclosing and Synchronism-Check
Synchronism Check
Figure 4.21 Synchronism-Check Settings
Synchronism-Check
Logic Outputs
Figure 4.22 shows the correspondence between synchronism-check logic
outputs (Relay Word bits) and the two-circuit breaker arrangement. These
Relay Word bits assert to logical 1 (e.g., 59VP equals logical 1) if true and
deassert to logical 0 (e.g., 59VS1 equals logical 0) if false. Table 4.26 lists
these Relay Word bits.
Figure 4.22 Synchronism-Check Relay Word Bits
Bus 2
Bus 1
Line
BK2
BK1
Synchronism-Check Voltage Source 1
SYNCS1 — designate voltage input
KS1M — adjust magnitude to reference
KS1A — adjust angle to reference
Synchronism-Check Voltage Reference
SYNCP — designate voltage input
25VL — voltage window/low threshold
25VH — voltage window/high threshold
Synchronism-Check Across Breaker BK2
25SFBK2 — max. slip frequency
ANG1BK2 — max. angle difference 1
ANG2BK2 — max. angle difference 2
TCLSBK2 — breaker close time
BSYNBK2 — block synch check (SEL
OGIC)
Synchronism-Check Across Breaker BK1
25SFBK1 — max. slip frequency
ANG1BK1 — max. angle difference 1
ANG2BK1 — max. angle difference 2
TCLSBK1 — breaker close time
BSYNBK1 — block synch check (SEL
OGIC)
Synchronism-Check Voltage Source 2
SYNCS2 — designate voltage input
KS2M — adjust magnitude to reference
KS2A — adjust angle to reference
1
3
1
. . .
. . .
. . .
Bus 2
Bus 1
Synchronism-Check Voltage Source 1
59VS1 — V
S1
healthy
Synchronism-Check Voltage Reference
59VP — V
P
healthy
Synchronism-Check Voltage Source 2
59VS2 — V
S2
healthy
Line
Synchronism-Check Across Breaker BK1
25ENBK1 — synchronism enabled
SFZBK1 — no slip
SFBK1 — slip < 25SFBK1
FAST1 — f
S1
> f
P
SLOW1 — f
S1
< f
P
25W1BK1 — synchronism within ANG1BK1
25A1BK1 — variation of 25W1BK1
25W2BK1 — synchronism within ANG2BK1
25A2BK1 — variation of 25W2BK1
Synchronism-Check Across Breaker BK2
25ENBK2 — synchronism enabled
SFZBK2 — no slip
SFBK2 — slip < 25SFBK2
FAST2 — f
S2
> f
P
SLOW2 — f
S2
< f
P
25W1BK2 — synchronism within ANG1BK2
25A1BK2 — variation of 25W1BK2
25W2BK2 — synchronism within ANG2BK2
25A2BK2 — variation of 25W2BK2
BK2
BK1
3
11
. . .
. . .
. . .