Hitachi Relion 670 Series Commissioning Manual page 175

1MRK506371-UUS Rev. M
10. If Internal detection logic Contact function selection = ContactSel setting equals Pole position from
auxiliary contacts. Then set inputs 52b_A...52a_C in a status that activates the pole discordance
logic and repeats step 2 to step 6.
11. Unsymmetrical current detection with CB monitoring: Set measured current in one phase to 110%
of current release level. Activate CLOSECMD and measure the operating time of the CCPDSC
(52PD) protection.
Use the TRIP signal from the configured binary output to stop the timer.
12. Deactivate the CLOSECMD: Set measured current in one phase to 90% of Current Release level.
Activate CLOSECMD.
NO TRIP signal should appear.
13. Repeat the previous two steps using OPENCMD instead of CLOSECMD. Asymmetry current
detection with CB monitoring: Set all three currents to 110% of Current Release level. Activate
CLOSECMD.
NO TRIP signal should appear due to symmetrical condition.
14. Deactivate the CLOSECMD. Decrease one current with 120% of the current unsymmetrical level
compared to the other two phases. Activate CLOSECMD and measure the operating time of the
CCPDSC (52PD) protection.
Use the TRIP signal from the configured binary output to stop the timer.
15. Deactivate the CLOSECMD. Decrease one current with 80% of the current unsymmetrical level
compared to the other two phases. Activate CLOSECMD.
NO TRIP signal should appear.
11.5.11.2 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.5.12 Directional underpower protection GUPPDUP (37)
Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
11.5.12.1 Verifying the settings
The underpower protection shall be set to values according to the real set values to be used.
The test is made by means of injection of voltage and current where the amplitude of both current and
voltage and the phase angle between the voltage and current can be controlled. During the test, the
analog outputs of active and reactive power shall be monitored.
1. Connect the test set for injection of voltage and current corresponding to the mode to be used in
the application. If a three-phase test set is available this could be used for all the modes. If a single-
phase current/voltage test set is available the test set should be connected to a selected input for
one-phase current and voltage.
Line distance protection REL670
Commissioning manual
© 2017 - 2023 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
"Requirements" and section
Section 11
SEMOD55625-106 v4
SEMOD175027-3 v5
"Preparing
SEMOD175027-7 v7
169