Schweitzer Engineering Laboratories SEL-700G Series, Instruction Manual

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10.7
Date Code 20170814 Instruction Manual SEL-700G Relay
Testing and Troubleshooting
Commissioning Tests
Figure 10.3 Three-Phase Wye AC Connections
Figure 10.4 Three-Phase Open-Delta AC Connections
Step 11. Apply rated current (1 A or 5 A).
If the relay is equipped with voltage inputs, apply rated voltage
for your application.
Step 12. Use the front-panel
METER > Fundamental
function or serial
port METER command to verify that the relay is measuring
the magnitude and phase angle of both voltage and current
correctly, taking into account the relay PTRX, PTRY, PTRS,
+120˚
–120˚
V
C
V
B
V
C
V
A
PHROT := ABC
+120˚
–120˚
PHROT := ACB
V
B
V
A
When setting PHROT := ABC, set angle V
A
= angle I
A
= 0˚
set angle V
B
= angle I
B
= —120˚
set angle V
C
= angle I
C
= 120˚
When setting PHROT := ACB, set angle V
A
= angle I
A
= 0˚
set angle V
B
= angle I
B
= 120˚
set angle V
C
= angle I
C
= —120˚
60˚
V
AB
V
CB
PHROT := ABC
60˚
V
AB
V
CB
PHROT := ACB
When setting PHROT := ABC, set angle I
A
= 0˚
set angle I
B
= —120˚
set angle I
C
= 120˚
set angle V
AB
= +30˚
set angle V
CB
= +90˚
When setting PHROT := ACB, set angle I
A
= 0˚
set angle I
B
= 120˚
set angle I
C
= —120˚
set angle V
AB
= —30˚
set angle V
CB
= —90˚