TRIP output contact opening or 52A input deassertion (whichever occurs later)
and CLOSE output contact closure.
5.
Record this time and compare to the 790I setting.
SYNCHRONIZING AND POLARIZING VOLTAGE ELEMENT TESTS
Purpose:
Verify the pickup levels of the 27P, 59P, 27S, and 59S voltage elements.
Method: 1.
Verify the 27VLO and 59VHI settings. Calculate the element secondary pickup
voltage, using the relay PTR setting for the 59P and 27P elements and the
SPTR setting for the 59S and 27S elements.
2.
Connect three-phase potentials to the relay voltage inputs. Set the 59P bit in an
available output contact logic mask. Apply balanced, three-phase voltages to
the relay below the 59VHI setting. Increase the applied voltage until the 59P
bit asserts, causing the monitored output contact to close. Note the voltage
applied.
3.
Set the 27P bit in an available output contact logic mask. Decrease the applied
voltage until the 27P bit asserts, causing the output contact to close. Note the
voltage applied.
4.
Connect a single voltage source to the relay synch-check voltage input, VS and
VSN. Set the 59S bit in an available output contact logic mask. Apply voltage
to the synch-check voltage input below the 59VHI setting. Increase the applied
voltage until the 59S bit asserts, causing the monitored output contact to close.
Note the voltage applied.
5.
Set the 27S bit in an available output contact logic mask. Decrease the applied
voltage until the 27S bit asserts, causing the output contact to close. Note the
voltage applied.
VOLTAGE CHECKING LOGIC TESTS
Purpose:
Verify operation of the relay voltage checking function.
Method: 1.
Using the SHOWSET command, check the relay PSVC setting. If PSVC = S
or E, continue this test with Step 2. IF PSVC = P, continue this test at Step 5.
If PSVC = N, the voltage checking scheme is disabled.
7-38
Maintenance & Testing
SEL-221F, -1 Instruction Manual
Date Code 920508
Summary of Contents for SEL-221F
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Page 69: ...Date Code 920508 Specifications SEL 221F 1 Instruction Manual 2 44 ...
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Page 110: ...Example Event Report 2 4 12 Event Reporting SEL 221F 1 Instruction Manual Date Code 930830 ...
Page 158: ...SETTINGS SHEET FOR SEL 221F RELAY PAGE 2 OF 6 DATE Date Code 921110 ...
Page 160: ...SETTINGS SHEET PAGE 4 OF 6 FOR SEL 221F RELAY DATE Date Code 930601 ...
Page 161: ...SETTINGS SHEET PAGE 5 OF 6 FOR SEL 221F RELAY DATE Date Code 961208 ...
Page 229: ...SEL 200 Series Relay Main Board Troubleshooting Test Points and Jumper Locations ...