Completing The Test - ABB RET670 Commissioning Manual

1MRK 504 154-UUS B
Permissive scheme
1. Inject the polarizing voltage 3V0, which is 5% of
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
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 (85) logic.
Use the TRIP signal from the configured binary output to stop the timer.
7. Compare the measured time with the setting for
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
10. Switch the fault current and the polarizing voltage off.
11. Reset the CR binary input and the BLOCK digital input.
10.11.1.2

Completing the test

Continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
10.11.2 Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH (85)
Prepare the IED for verification of settings as outlined in the 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.
Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
First, test the four step residual overcurrent protection function EF4PTOC (51N/67N) and then the
current reversal and weak-end infeed logic according to the corresponding instructions. Then
continue with the instructions below.
Commissioning manual
tCoord .
No TRIP signal should appear, and the CS binary output should be activated.
tCoord .
No TRIP signal should appear.
in this chapter.
Testing functionality by secondary injection
VBase (EF4PTOC, 51N67N) where the current
tCoord .
TestMode setting to Disabled .
"Requirements"
Section 10
M13926-42 v7
M13926-71 v5
M13936-2 v7
and
205