10.8
SEL-700G Relay
Instruction Manual
Date Code 20170814
Testing and Troubleshooting
Commissioning Tests
PTRN, CTRX, CTRY, or CTRN (the settings are model
dependent) settings and the fact that the quantities are
displayed in primary units.
If you are using a current transformer for the neutral, apply a
single-phase current to the
IN
terminal. Do not apply voltage.
Step 13. Verify that the relay is measuring the magnitude and phase
angle correctly.
The expected magnitude is (applied current) • (CTRN). The
expected phase angle is zero (0).
Step 14. Verify control input connections. Using the front-panel
MAIN > Targets > Row 49
function, check the control input
status in the relay (
IN101
or
IN102
).
As you apply rated voltage to each input, the position in
Row 49 corresponding to that input should change from zero
(0) to one (1).
Step 15. Verify output contact operation:
a. For each output contact, set the input to logical 1. This
causes the output contact to close. For example, setting
OUT101 = 1 causes the output
OUT101
contact to close.
b. Repeat the process for all contact outputs.
Make sure that each contact closure does what you
want it to do in the annunciation, control, or trip circuit
associated with that contact closure.
Step 16. Perform the protection element tests you want. Perform only
enough tests to prove that the relay operates as intended;
exhaustive element performance testing is not necessary for
commissioning.
Step 17. Connect the relay for tripping duty.
Step 18. Verify that any settings changed during the tests performed in
Step 15 and Step 16 are changed back to the correct values for
your application.
Step 19. Use the serial port commands in Table 10.3 to clear the relay
data buffers and prepare the relay for operation.
This prevents data generated during commissioning testing
from being confused with operational data collected later.
Step 20. When it is safe to do so, energize the equipment/bus.
Table 10.3
Serial Port Commands That Clear Relay Data Buffers
Serial Port Command
Task Performed
LDP C
Clears Load Profile Data
SER R
Resets Sequential Events Record buffer
SUM R
Resets Event Report and Summary Command buffers
Summary of Contents for SEL-700G Series
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