Zone 3 Reach Check - GE MiCOM P40 Agile Technical Manual

P543i/P545i
12.2.4

ZONE 3 REACH CHECK

1. The zone 3 element is set to forward, reverse or offset. The current injected must be in the appropriate
direction to match the setting in the DISTANCE SETUP column.
2. Apply a dynamic C-A fault, slightly in excess of the expected reach. The duration of the injection should be
in excess of the tZ3 timer setting (typically tZ3 + 100 ms).
3. Repeat the test described above to find the zone reach.
4. Record the impedance at which the device trips. The measured impedance should be within +/- 10% of the
expected reach.
5. Read and reset the alarms.
6. Check that the correct reverse offset (Z3') has been applied. The setting is in the Z3' Ph Rev Reach and Z3'
Gnd Rev Reach cells.
12.2.5 ZONE 4 REACH CHECK
The zone 4 element is set to be directional reverse.
1. Apply a dynamic B-N fault, slightly in excess of the expected reach. The duration of the injection should be
in excess of the tZ4 timer setting (typically tZ4 + 100 ms).
2. Repeat the test described above to find the zone reach.
3. Record the impedance at which the device trips. The measured impedance should be within +/- 10% of the
expected reach.
4. Read and reset the alarms.
12.2.6 ZONE P REACH CHECK
The zone P element can be set to forward or reverse directional or offset. The current injected must be in the
correct direction to match the setting in the DISTANCE SETUP column.
1. Apply a dynamic C-N fault, slightly in excess of the expected reach. The duration of the injection should be
in excess of the tZP timer setting (typically tZP + 100 ms).
2. Repeat the test described above to find the zone reach.
3. Record the impedance at which the relay trips. The measured impedance should be within +/-10% of the
expected reach.
4. Read and reset the alarms.
12.2.7 ZONE Q REACH CHECK
The zone Q element can be set to forward or reverse directional or offset. The current injected must be in the
correct direction to match the setting in the DISTANCE SETUP column.
1. Apply a dynamic C-N fault, slightly in excess of the expected reach. The duration of the injection should be
in excess of the tZQ timer setting (typically tZQ + 100 ms).
2. Repeat the test described above to find the zone reach.
3. Record the impedance at which the relay trips. The measured impedance should be within +/-10% of the
expected reach.
4. Read and reset the alarms.
12.2.8 RESISTIVE REACH
This is for quadrilateral characteristics only.
P54x1i-TM-EN-1
Chapter 25 - Commissioning Instructions
669