Date Code 20010731 Testing and Troubleshooting 11-9
SEL-352-1, -2 Instruction Manual
line-to-neutral currents should be 600 amperes. All line-to-line quantities
should be balanced, differing from the line-to-neutral measurements by a
factor of 1.73. Real power P and reactive power Q should be
approximately 0.
Step 13.
Purpose: Verify current and voltage connections.
Method: Reduce the current source output to 0.40 A per phase. Set the voltage
source outputs to deliver 5 V per phase, balanced voltages, in phase with
the currents applied. Turn on the voltage sources. Execute the METER
command. Verify the voltage and current magnitudes, recalling the relay
PTR and CTR settings. Power P should read approximately 15 MW; Q
should read approximately 0 MVAR. If you inadvertently switch a pair of
voltages or currents or roll the polarity of a current input, the meter
reading should be incorrect. Turn the voltage and current sources off.
Step 14.
Purpose: Verify that logic inputs assert when control voltage is applied across the
respective terminal pair.
Method: 1. Set the target LEDs to display the contact inputs by typing TARGET
F IN101 <ENTER>. The bottom row of the front-panel LEDs should
now follow contact inputs IN101 through IN106, which is Relay Word
Row 17.
2. Apply control voltage to each input and make sure the corresponding
target LED turns on.
3. Repeat this step for each input. Use the TARGET F command to
display the appropriate input elements. For example, to see the row of
the Relay Word that has IN301, type TAR F IN301<ENTER>. The
relay will not display input elements that your interface board does not
support.
Step 15. Purpose: Verify that contact outputs assert when you execute the PULSE
command.
Method: 1. Set the target LEDs to display the contact outputs by typing TAR F
OUT101 <ENTER>. The front-panel LEDs should now follow Row
73 of the Relay Word where OUT101 is listed.
2. Execute the PULSE n command for each output contact. Verify that
the corresponding target LED illuminates and output contact closes for
approximately one second. For example, type PUL OUT101
<ENTER> to test output contact 101.
3. Repeat this step for each output. Use the TARGET F command to
display the appropriate output elements. For example, to see the row
of the Relay Word that has OUT301, type TAR F OUT301
<ENTER>. The relay will not display output elements that your
interface board does not support.
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