Schweitzer Engineering Laboratories SEL-421-4 - Table 6.47 Group Settings

6.175
Date Code 20171021 Instruction Manual SEL-421 Relay
Protection Applications Examples
230 kV Tapped Transmission Line Application Example
Group Settings
Table 6.47 Group Settings (Sheet 1 of 2)
Setting Prompt Entry
Line Configuration
CTRW CT Ratio—Input W 240
CTRX CT Ratio—Input X 240
PTRY PT Ratio—Input Y 2000.0
VNOMY PT Nominal Voltage (L-L)—Input Y 115
PTRZ PT Ratio—Input Z 1000.0
VNOMZ PT Nominal Voltage (L-L)—Input Z 115
DCB Trip Scheme
a
BT Block Trip RMB1A OR RMB1B
Synchronism-Check Element Reference (Group)
SYNCP Synch Reference VAY
25VL Voltage Window Low Threshold (volts) 60.0
25VH Voltage Window High Threshold (volts) 70.0
Breaker 1 Synchronism Check (Group)
SYNCS1 Synch Source 1 VAZ
KS1M Synch Source 1 Ratio Factor 1.00
KS1A Synch Source 1 Angle Shift (degrees) 0.00
25SFBK1 Maximum Slip Frequency—BK1 OFF
ANG1BK1 Maximum Angle Difference 1—BK1(degrees) 20.00
ANG2BK1 Maximum Angle Difference 2—BK1 (degrees) 20.00
BSYNBK1 Block Synchronism Check—BK1 (SEL
OGIC)NA
Breaker 2 Synchronism Check (Group)
SYNCS2 Synch Source 2 VBZ
KS2M Synch Source 2 Ratio Factor 1.00
KS2A Synch Source 2 Angle Shift (degrees) 0.00
ALTS2 Alternative Synch Source 2 (SEL
OGIC)NA
25SFBK2 Maximum Slip Frequency—BK2 OFF
ANG1BK2 Maximum Angle Difference 1—BK2 (degrees) 20.00
ANG2BK2 Maximum Angle Difference 2—BK2 (degrees) 20.00
BSYNBK2 Block Synchronism Check—BK2 (SEL
OGIC)NA
Recloser and Manual Closing
NSPSHOT Number of Single-Pole Reclosures N
N3PSHOT Number of Three-Pole Reclosures 1
E3PRI1 Three-Pole Reclose Enable—BK1 (SEL
OGIC)1
E3PRI2 Three-Pole Reclose Enable—BK2 (SEL
OGIC) NOT LEADBK2
TBBKD Time Between Breakers for ARC (cycles) 300
BKCFD Breaker Close Failure Delay (cycles) 300
SLBK1 Leader = Circuit Breaker 1 (SEL
OGIC)1
SLBK2 Leader = Circuit Breaker 2 (SEL
OGIC)0