Cec Example For A Permanent Fault - S&C IntelliRupter PulseCloser Manual

CEC Example for a
Permanent Fault
This example shows communication-enhanced coordination for a permanent fault.
• All IntelliRupter fault interrupters are closed and coordinated where possible.
See Figure 23.
• IntelliRupter fault interrupters IR3 and IR4 detect the fault and send curve-shift mes-
sages to their source-side neighbors. See Figure 24.
• IR2 and IR3 shift to a slower TCC curve. See Figure 25.
• IR4 trips and locks out after testing is completed.
• IR2 and IR3 change back to the original CEC fast curve. See Figure 28.
600 A
IEEE Inverse
IR1
Figure 23. CEC permanent fault; all IntelliRupter fault interrupters are closed and coordinated.
IR1
Figure 24. CEC permanent fault; IR3 and IR4 detect the fault and send a curve-shift message.
600 A
IEEE Inverse
IR1
Figure 25. CEC permanent fault; IR2 and IR3 shift to a slower TCC curve.
600 A
IEEE Inverse
IR1
Figure 26. CEC permanent fault; IR2 and IR3 return to the fast CEC curve.
Communication Enhanced Coordination
400 A
IEEE Inverse
IR2 IR3
SHIFT
SHIFT
IR2
IR3
IR2
IR3
400 A
IEEE Inverse
IR2
IR3
S&C Instruction Sheet 766-530
IR4 IR5
IR4
IR5
400 A
IEEE Inverse
IR4
IR5
IR4 IR5
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