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Appendix B. ACCEPTANCE/MAINTENANCE TESTS
Maintenance qualification tests will determine if a particular REL300 unit is working correctly.
Refer to the WARNING note in Appendix A (page A-1) before energizing the relay.
1.1
Non-Pilot Maintenance Tests
It is recommended that either Doble or Multi-Amp test equipment should be used for this test.
Refer to Figure B-1 and B-2 for the input voltage and current terminal connection per configu-
ration 1. Check all jumper positions on the Interconnect module for rated dc voltage.
1.1.1
Front Panel and Metering Check
Step 1.
Step 2.
Step 3.
Step 4.
1.1.2
Impedance Accuracy Check
Step 5.
Turn on rated dc voltage. Check the FREQ setting; it should match the line frequen-
cy and ct type (CTYP). Apply a balanced 3-phase voltage (70 Vac); the Alarm 1
relay should be energized. (Terminal TB4/7 and TB4/8 should be zero ohms.) The
"Relay-in-Service" LED should be "ON".
Press RESET pushbutton; the green LED (Volts/Amps/Angle) should be "ON".
Press the FUNCTION RAISE or FUNCTION LOWER pushbutton. Read the input
voltages and their angles:
70 ∠0°
V
=
AG
70 ∠−120°
V
=
BG
70 ∠120°
V
=
CG
with an error of ± 1 volt and ± 2°.
Press the DISPLAY SELECT pushbutton, and note that the mode LED cycles thru
the five display modes. Release the pushbutton so that the SETTINGS mode LED
is "ON". Press the RAISE button to scroll thru the FUNCTION FIELD to check the
settings per Table B-1. Change the setting, if necessary, by depressing the RAISE
button in the VALUE FIELD to the desired value and then pressing the ENTER but-
ton. The Value Excepted LED should be lit to confirm the new data entry.
Press the RESET pushbutton (LED jumps to Metering mode). Apply 3.0 A to I
an angle of -75°. Read I
A
of 5% and ± 2°. Move the input current from IA to IB or IC terminal. Read I
to verify the transformer's accuracy.
Apply voltages to REL300 as follows:
30 ∠0°
V
=
A
70 ∠-120°
V
=
B
70 ∠120°
V
=
C
from the front display; it should be 3.0 ∠−75° with an error
I.L. 40-385.7
with
A
or I
B
C
B-1
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