Completing The Test; High Impedance Differential Protection Hzpdif; Verifying The Settings - ABB REG650 Commissioning Manual

Section 6
Testing functionality
6.3.2.2
6.3.3
6.3.3.1
46
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 testing by setting the parameter TestMode
to Off under Main menu/Tests/IED test mode/TESTMODE:1. If another function
is tested, then set the parameter Blocked to No under Main menu/Tests/Function test
modes/Differential/REFPDIF(87,INd)/REFPDIF:X for the function, or for each
individual function in a chain, to be tested next. Remember to set the parameter
Blocked to Yes, for each individual function that has been tested.

High impedance differential protection HZPDIF

Prepare the IED for verification of settings as outlined in
verify settings".
Values of the logical signals for HZPDIF are available on the local HMI under Main
menu/Tests/Function status/Differential/HZPDIF(87,IdN)/HZPDIF:X. The
Signal Monitoring in PCM600 shows the same signals that are available on the local
HMI.

Verifying the settings

1. Connect single-phase or three-phase test set to inject the operating voltage. The
injection shall be on the primary side of the stabilizing resistor.
The operating voltage is adjusted on the stabilizing resistor and
the setting of the resistor value must be done in the function. This
is essential for the measurement of the expected value. Normally
a slightly higher operating value is no problem as the sensitivity
is not influenced much.
2. Increase the voltage and make note of the operate value U>Trip. This is done by
manual testing and without trip of the test set.
3. Connect the trip contact to the test set to stop the test set for measurement of trip
times below.
4. Reduce the voltage slowly and make note of the reset value. The reset value must
be high for this function.
5. Check the operating time by injecting a voltage corresponding to 1.2 · U>Trip
level. Make note of the measured trip time.
1MRK 502 049-UEN A
5.1 "Preparing the IED to
Commissioning manual