Loss Of Excitation Lexpdis; Verifying The Settings - ABB Relion REG650 Commissioning Manual

Section 7
Testing functionality
activated where x refers to the actual phase to be tested. After the timer
depending on selected zone) for the actual zone has elapsed, also the signals TRIP and TRZx
(where x is 1-3 depending on selected zone) shall be activated.
7.4.2

Loss of excitation LEXPDIS

Prepare the IED for verification of settings as outlined in
settings".
Values of the logical signals for LEXPDIS are available on the local HMI under Main menu/
Tests/Function status/Impedance/LEXPDIS(40)/1:LEXPDIS. The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
7.4.2.1

Verifying the settings

The test is done by means of injection of three phase current and three phase voltage from a
modern test device. This test device shall be able to give voltage and current corresponding to
the set apparent impedance.
1. Feed the IED with current and voltage corresponding to the apparent impedance: Test #1,
as shown in figure 10. Read the analog outputs for R and X and check that this reading
corresponds to the injected impedance. No start or trip signals shall be activated.
2. Feed the IED with current and voltage corresponding to the apparent impedance: Test
#2, as shown in figure 10. Read the analog outputs for R and X and check that this reading
corresponds to the injected impedance. No start or trip signals shall be activated.
3. Feed the IED with current and voltage corresponding to the apparent impedance: Test
#3, as shown in figure 10. Read the analog outputs for R and X and check that this reading
corresponds to the injected impedance. The signals START and STZ2 shall be activated
instantaneously and the signals TRIP and TRZ2 shall be activated after the set delay
4. Switch the current infeed injection off. The function shall reset. Turn the current on with
the values corresponding to Test #3 and measure the time to activation of signal TRZ2.
This time shall be compared to
5. Feed the IED with current and voltage corresponding to the apparent impedance: Test
#4, as shown in figure 10. Read the analog outputs for R and X and check that this
reading corresponds to the injected impedance. The signals START, STZ2 and STZ1 shall
be activated instantaneously and the signals TRIP, TRZ2 and TRZ1 shall be activated after
the different set time delays.
6. Switch the current infeed injection off. The function shall reset. Turn the current on with
the values corresponding to Test #4 and measure the time to activation of signal TRZ1.
This time shall be compared to
44
tZ2 .
tZ1 .
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tZx (where x is 1-3
6.1"Preparing the IED to verify
Generator protection REG650
Commissioning manual
SEMOD158873-3 v3
SEMOD158873-39 v3
tZ2 .