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3.7
Date Code 20171021
Instruction Manual
SEL-421 Relay
Testing
Relay Test Connections
Connections for Three Voltage Sources and One Current Source
show connections to use when you have three voltage
sources and a single current source. You can use the connections shown in
to simulate phase-to-ground faults. Use the connections shown in
to simulate phase-to-phase faults.
Figure 3.5
Test Connections Using a Single Current Source for a Phase-to-
Ground Fault
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 Secondary
Voltage and Current Inputs
N
N
N
Содержание SEL-421-4
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