Sel SEL-421 - Figure 4.22 Setting CTRW and PTRY: Terminal; Figure 4.23 Test Connections Using Three Voltage Sources;Three Current Sources

U.4.32
SEL-421/SEL-421-1 Relay User’s Guide Date Code 20020501
Basic Relay Operations
Examining Metering Quantities
=>>SET CTRW TERSE<Enter>
Group 1
Line Configuration
Current Transformer Ratio - Input W (1-50000) CTRW := 1000 ?200<Enter>
Current Transformer Ratio - Input X (1-50000) CTRX := 1000 ?<Enter>
Potential Transformer Ratio - Input Y (1-10000) PTRY := 2000 ?END<Enter>
Save settings (Y,N) ?Y<Enter>
Saving Settings, Please Wait...........
Settings Saved
=>>
Figure 4.22 Setting CTRW and PTRY: Terminal.
Step 5. Turn relay power off.
Step 6. Connect analog inputs. If three voltage sources and three
current sources are available, connect the sources to the relay as
shown in Figure 4.23. If three voltage sources and two current
sources are available, use the connection diagram of
Figure 4.24. Apply 67 V per phase (line-to-neutral) in ABC
phase rotation. Apply 2.0 A per phase, in phase with the
applied phase voltages.
Figure 4.23 Test Connections Using
Three Voltage Sources/Three Current Sources.
Three-Phase
Voltage and Current
Test Sources
IA
VB
IB
VC
IC
VA
IAW
Z01 Z02 Z03 Z04 Z05 Z06
Z13 Z14 Z15 Z16 Z17 Z18
IBW ICW
VAY VBY VCY
Relay Rear-Panel Analog
Voltage and Current Inputs