Sel 411L - Figure 11.4 Test Connections for the Single-Terminal 87 L Test

P.11.13
Date Code 20151029 Protection Manual SEL-411L Relay
Testing and Troubleshooting
Relay Test Connections
Single-Terminal 87L Test Connections
Use this connection to check the 87L characteristic against the applied settings
(maintenance test). A current representing the local quantity is injected into
one of the relay inputs. A second current representing a remote quantity is
injected into another current terminal of the relay. The specific inputs are
dependent of the particular element under test as shown in Figure 11.4.
Communications with other relays is not required for this test.
Figure 11.4 Test Connections for the Single-Terminal 87L Test
Z08Z07
IAX
Z10
Z09
IBX
Z12
Z11
ICX
Z02Z01
IAW
Z04Z03
IBW
Z06
Z05
ICW
Z08Z07
IAX
Z10Z09
IBX
Z12
Z11
ICX
Z02
Z01
IAW
Z04Z03
IBW
Z06
Z05
ICW
Three-Phase
Current Test Source
Z08
Z07
IAX
Z10
Z09
IBX
Z12
Z11
ICX
Three-Phase
Current Test Source
Three-Phase
Current Test Source
Test Connections for 87LA, 87LQ, 87LG
Test Connections for 87LB
Test Connections for 87LC
Remote Current
Local Current
Remote Current
Local Current
Local Current
Remote Current
I1
N
I2
N
I3
N
I1
N
I2
N
I3
N
I1
N
I2
N
I3
N
Z02Z01
IAW
Z04Z03
IBW
Z06
Z05
ICW
B12B11
OUT
206
Test Point
B12
B11
OUT
206
Test Point
B12
B11
OUT
206
Test Point