GE L60, Instruction Manual, Page: 131 / 498

GE Multilin L60 Line Phase Comparison Relay 5-39
5 SETTINGS 5.2 PRODUCT SETUP
5
Figure 5–10: SINGLE-CHANNEL OPEN LOOP CONFIGURATION
In the above application, the following settings should be applied:
UR IED 1:
DIRECT OUTPUT DEVICE ID:
“1” UR IED 2:
DIRECT OUTPUT DEVICE ID:
“2”
DIRECT I/O RING CONFIGURATION:
“Yes”
DIRECT I/O RING CONFIGURATION:
“Yes”
UR IED 3:
DIRECT OUTPUT DEVICE ID:
"3"
DIRECT I/O RING CONFIGURATION:
"Yes"
In this configuration the following delivery times are expected (at 128 kbps):
IED 1 to IED 2: 0.2 of power system cycle; IED 1 to IED 3: 0.5 of power system cycle;
IED 2 to IED 3: 0.2 of power system cycle
In the above scheme, IEDs 1 and 3 do not communicate directly. IED 2 must be configured to forward the messages as
explained in the
Inputs/Outputs section. A blocking pilot-aided scheme should be implemented with more security and, ide-
ally, faster message delivery time. This could be accomplished using a dual-ring configuration as shown below.
Figure 5–11: DUAL-CHANNEL CLOSED LOOP (DUAL-RING) CONFIGURATION
In the above application, the following settings should be applied:
UR IED 1:
DIRECT OUTPUT DEVICE ID:
“1” UR IED 2:
DIRECT OUTPUT DEVICE ID:
“2”
DIRECT I/O RING CONFIGURATION:
“Yes”
DIRECT I/O RING CONFIGURATION:
“Yes”
UR IED 3:
DIRECT OUTPUT DEVICE ID:
"3"
DIRECT I/O RING CONFIGURATION:
"Yes"
In this configuration the following delivery times are expected (at 128 kbps) if both the rings are healthy:
IED 1 to IED 2: 0.2 of power system cycle; IED 1 to IED 3: 0.2 of power system cycle;
IED 2 to IED 3: 0.2 of power system cycle
The two communications configurations could be applied to both permissive and blocking schemes. Speed, reliability and
cost should be taken into account when selecting the required architecture.
842714A1.CDR
UR IED 1
TX1
RX1
UR IED 2
RX2
TX2
RX1
TX1
UR IED 3
RX1
TX1
842715A1.CDR
UR IED 1
TX1
RX2
TX2
RX1
UR IED 2
RX2
TX1
RX1
TX2
UR IED 3
RX1
TX2
TX1
RX2