GE B90 - Page 358

5-166 B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS CHAPTER 5: SETTINGS
5
5.6.4.6 Application example
For illustration, assume the F7 current is monitored for Breaker Failure protection of a given breaker as shown.
Figure 5-88: Direct I/O sample configuration for breaker failure protection
The Protection IEDs 1, 2, and 3 (
B90 FUNCTION set to "Protection") send the Breaker Fail current supervision flags over the
Direct I/O communications. Assume bits 13, 14, and 15 are used for this purpose as follows:
For IED 1:
DIRECT OUTPUT DEVICE ID: "1" (this is an originating device)
DIRECT OUT 13 OPERAND: "BKRSUPV 3 SUPV OP" (this operand drives output number 13)
DIRECT OUT 14 OPERAND: "BKRSUPV 3 HISET OP" (this operand drives output number 14)
DIRECT OUT 15 OPERAND: "BKRSUPV 3 LOSET OP" (this operand drives output number 15)
For IED 2:
DIRECT OUTPUT DEVICE ID: "2" (this is an originating device)
DIRECT OUT 13 OPERAND: "BKRSUPV 3 SUPV OP" (this operand drives output number 13)
DIRECT OUT 14 OPERAND: "BKRSUPV 3 HISET OP" (this operand drives output number 14)
DIRECT OUT 15 OPERAND: "BKRSUPV 3 LOSET OP" (this operand drives output number 15)
For IED 3:
DIRECT OUTPUT DEVICE ID: "3" (this is an originating device)
DIRECT OUT 13 OPERAND: "BKRSUPV 3 SUPV OP" (this operand drives output number 13)
DIRECT OUT 14 OPERAND: "BKRSUPV 3 HISET OP" (this operand drives output number 14)
DIRECT OUT 15 OPERAND: "BKRSUPV 3 LOSET OP" (this operand drives output number 15)
The above nine flags must be received at the IED 4. Assume Direct Inputs 1 through 9 are to be used for this purpose. This
is accomplished with the following settings.
For IED 4:
DIRECT INPUT 1 DEVICE: "1" (message received from IED 1)
DIRECT INPUT 1 BIT NUMBER: "13" (this is BKRSUPV 3 SUPV OP for Phase A)
DIRECT INPUT 2 DEVICE: "1" (message received from IED 1)
DIRECT INPUT 2 BIT NUMBER: "14" (this is BKRSUPV 3 HISET OP for Phase A)
DIRECT INPUT 3 DEVICE: "1" (message received from IED 1)
DIRECT INPUT 3 BIT NUMBER: "15" (this is BKRSUPV 3 LOSET OP for Phase A)
DIRECT INPUT 4 DEVICE: "2" (message received from IED 2)
DIRECT INPUT 4 BIT NUMBER: "13" (this is BKRSUPV 3 SUPV OP for Phase B)