Sel SEL-421 - Synchronism Check Element Reference; Breaker 1 Synchronism Check

R.10.29
Date Code 20111215 Reference Manual SEL-421 Relay
Settings
Group Settings
Make Table 10.62 settings if Group settings E25BK1 := Y or E25BK2 := Y.
Make Table 10.63 settings if Group setting E25BK1 := Y.
ELCBF1 Load Current Breaker Failure Logic—BK1 (Y, N) N N
50LP1 Phase Load Current Pickup—BK
(0.25–50 A secondary) 5 A
(0.05–10 A secondary) 1 A
0.50 0.10
LCPU1 Load Pickup Time Delay—BK1 (0.000–6000 cycles) 9.000 9.000
BFILC1 Breaker Failure Load Current Initiate—BK1
(SEL
OGIC Equation)
NA NA
EFOBF1 Flashover Breaker Failure Logic—BK1 (Y, N) N N
50FO1 Flashover Current Pickup—BK1
(0.25–50 A secondary) 5 A
(0.05–10 A secondary) 1 A
0.50 0.10
FOPU1 Flashover Time Delay—BK1 (0.000–6000 cycles) 9.000 9.000
BLKFOA1 Block A-Phase Flashover—BK1
(SEL
OGIC Equation)
NA NA
BLKFOB1 Block B-Phase Flashover—BK1
(SEL
OGIC Equation)
NA NA
BLKFOC1 Block C-Phase Flashover—BK1
(SEL
OGIC Equation)
NA NA
BFTR1 Breaker Failure Trip—BK1
(SEL
OGIC Equation)
NA NA
BFULTR1 Breaker Failure Unlatch Trip—BK1
(SEL
OGIC Equation)
NA NA
a
Replace 1 with 2 in the setting label.
b
Make setting when EBFL1 := 2 or EBFL2 := 2.
Table 10.62 Synchronism Check Element Reference
Label Prompt Default Value
SYNCP Synchronism Reference
( VAY, V B Y, V C Y, VA Z , V B Z, V CZ)
VAY
25VL Voltage Window Low Threshold
(20.0–200 V secondary)
55.0
25VH Voltage Window High Threshold
(20.0–200 V secondary)
70.0
Table 10.63 Breaker 1 Synchronism Check (Sheet 1 of 2)
Label Prompt Default Value
SYNCS1 Synchronism Source 1
( VAY, V B Y, V C Y, VA Z , V B Z, V CZ)
VA Z
KS1M Synchronism Source 1 Ratio Factor (0.10–3) 1.00
KS1A Synchronism Source 1 Angle Shift (0, 30, 60, 90, 120,
150, 180, 210, 240, 270, 300, 330 degrees)
0
25SFBK1 Maximum Slip Frequency—BK1 (OFF, 0.005–0.5
Hz)
0.050
Table 10.61 Breaker 1 Failure Logic (and Breaker 2 Failure Logic
a
)
(Sheet 2 of 2)
Default Value
Label Prompt 5 A 1 A