GE D30 series Instruction Manual page 348

5.8 INPUTS AND OUTPUTS
EXAMPLE 2: PILOT-AIDED SCHEMES
Consider a three-terminal line protection application shown in the figure below.
Assume the Hybrid Permissive Overreaching Transfer Trip (Hybrid POTT) scheme is applied using the architecture shown
below. The scheme output operand
5
In the above architecture, Devices 1 and 3 do not communicate directly. Therefore, Device 2 must act as a 'bridge'. The fol-
lowing settings should be applied:
UR IED 1:
DIRECT OUT 2 OPERAND:
DIRECT INPUT 5 DEVICE ID:
DIRECT INPUT 5 BIT NUMBER:
DIRECT INPUT 6 DEVICE ID:
DIRECT INPUT 6 BIT NUMBER:
UR IED 3:
DIRECT OUT 2 OPERAND:
DIRECT INPUT 5 DEVICE ID:
DIRECT INPUT 5 BIT NUMBER:
DIRECT INPUT 6 DEVICE ID:
DIRECT INPUT 6 BIT NUMBER:
UR IED 2:
DIRECT INPUT 5 DEVICE ID:
DIRECT INPUT 5 BIT NUMBER:
DIRECT INPUT 6 DEVICE ID:
DIRECT INPUT 6 BIT NUMBER:
DIRECT OUT 2 OPERAND:
DIRECT OUT 3 OPERAND:
DIRECT OUT 4 OPERAND:
5-228
UR IED 1
Figure 5–121: THREE-TERMINAL LINE APPLICATION
is used to key the permission.
HYB POTT TX1
TX1
UR IED 1
RX1
UR IED 3
Figure 5–122: SINGLE-CHANNEL OPEN-LOOP CONFIGURATION
" "
HYB POTT TX1
"2"
"2" (this is a message from IED 2)
"2"
"4" (effectively, this is a message from IED 3)
" "
HYB POTT TX1
"2"
"2" (this is a message from IED 2)
"2"
"3" (effectively, this is a message from IED 1)
"1"
"2"
"3"
"2"
" "
HYB POTT TX1
" " (forward a message from 1 to 3)
DIRECT INPUT 5
" " (forward a message from 3 to 1)
DIRECT INPUT 6
D30 Line Distance Protection System
UR IED 2
UR IED 3
842713A1.CDR
RX1 RX2
UR IED 2
TX1 TX2
RX1
TX1
842714A1.CDR
5 SETTINGS
GE Multilin