High Impedance Differential Protection Hzpdif; Verifying The Settings - ABB Relion 670 Series Installation And Commissioning Manual

1MRK 502 029-UEN A
15.4.4
15.4.4.1
Installation and commissioning manual

High impedance differential protection HZPDIF

Prepare the IED for verification of settings outlined in section
section "Preparing for test"

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.
As the operating voltage is adjusted on the stabilizing resistor
and with the setting of the resistor value 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. Connect the trip contact to the test set to stop the test set for measurement of
trip times below.
3. Increase the voltage and make note of the operate value U>Trip. This is done
with manual test and without trip of the test set.
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.
6. If required, verify the trip time at another voltage. Normally 2 · U>Trip is
selected.
7. If used, measure the alarm level operating value. Increase the voltage and
make note of the operate value U>Alarm. This is done with manual test and
without trip of the test set.
8. Measure the operating time on the alarm output by connecting the stop of the
test set to an output from tAlarm. Inject a voltage 1.2 · U>Alarm and measure
the alarm time.
9. Check that trip and alarm outputs operate accordingly to the configuration logic.
10. Finally check that start and alarm information is stored in the event menu and
if a serial connection to the SA is available verify that the correct and only the
required signals are presented on the local HMI and on the SCADA system.
Information on how to use the event menu is found in the operator's
manual.
Verifying settings by secondary injection
in this chapter.
Section 15
"Overview" and
159