1. Inject the polarizing voltage 2U0, which is 5% of UBase (EF4PTOC) where
the current is lagging the voltage by 65°.
2. Inject current (65° lagging the voltage) into one phase at about 110% of the
set operating current, and switch the current off with the switch.
3. Switch the fault current on, (110% of the set operating current) and wait
longer than the set value tCoord.
No TRIP signal should appear, and the CS binary output
should be activated.
4. Switch the fault current off.
5. Activate the CR binary input.
6. Switch the fault current on (110% of the set operating current) and measure
the operating time of the ECPSCH logic.
Use the TRIP signal from the configured binary output.
7. Compare the measured time with the setting for tCoord.
8. Activate the BLOCK digital input.
9. Switch the fault current on (110% of the set operating current) and wait for a
period longer than the set value tCoord.
No TRIP signal should appear.
10. Switch the fault current and the polarizing voltage off.
11. Reset the CR binary input and the BLOCK digital input.
10.10.3.2 Completing the test
M13926-71 v5
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.
10.10.4 Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH
M13936-2 v8
Prepare the IED for verification of settings as outlined in section
"Requirements"
and section "Preparing for test" in this chapter.
Values of the logical signals for ECRWPSCH are available on the Local HMI
under Main menu/Tests/Function status/Scheme communication/ECRWPSCH(85)/
ECRWPSCH:1.
The Signal Monitoring in PCM600 shows service values that are available on the
Local HMI as well.
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 159
Commissioning manual
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