Completing The Test; Impedance Protection; Full Scheme Distance Protection, Mho Characteristic Zmhpdis135 - ABB REG670 Commissioning Manual

1MRK 502 073-UEN A
13.3.4.2
13.4
13.4.1
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Commissioning manual
Testing functionality by secondary injection
1. Connect the test set for single-phase current injection to the protection
terminals connected to the CT in the power transformer neutral-to-earth
circuit.
2. Increase the injection current and note the operating value of the protection
function.
3. Check that all trip and start signals appear according to the configuration
logic.
4. Decrease the current slowly from operate value and note the reset value.
5. Connect the timer and set the current to ten times the value of the IdMin
setting.
6. Switch on the current and note the operate time.
7. Connect the test set to terminal L1 and neutral of the three-phase current input
configured to REFPDIF. Also inject a current higher than half the IdMin
setting in the neutral-to-earth circuit with the same phase angle and with
polarity corresponding to an internal fault.
8. Increase the current injected in L1, and note the operate value. Decrease the
current slowly and note the reset value.
9. Inject current into terminals L2 and L3 in the same way as in step 7 above
and note the operate and reset values.
10. Inject a current equal to 10% of rated current into terminal L1.
11. Inject a current in the neutral-to-earth circuit with the same phase angle and
with polarity corresponding to an external fault.
12. Increase the current to five times the operating value and check that the
protection does not operate.
13. Finally check that trip information is stored in the event and disturbance
recorder.

Completing the test

Continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.

Impedance protection

Full scheme distance protection, mho characteristic
ZMHPDIS
Prepare the IED for verification of settings outlined in Section
to verify settings".
Keep the current constant when measuring operating characteristics. Keep the
current as close as possible to its rated value or lower. But make sure it is higher
than the set minimum operating current.
Section 13
SEMOD55252-118 v5
SEMOD53525-1 v2
M14944-3 v10
"Preparing the IED
135