Completing The Test - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
1. Check that the input logical signal BLOCK to the BRCPTOC (46) function block is logical zero
and note on the local HMI that the output signal TRIP from the BRCPTOC (46) function block
is equal to the logical 0.
2. Set the measured current (fault current) in one phase to about 110% of the set operating
current
Observe to not exceed the maximum permitted overloading of the current circuits in the
terminal.
3. Switch on the fault current and measure the operating time of BRCPTOC (46).
TRIP is controlled by Gate 13 in the configuration.
Use the TRIP signal from the configured binary output to stop the timer.
4. Compare the measured time with the set value
5. Activate the BLOCK binary input.
6. Switch on the fault current (110% of the setting) and wait longer than the set value
No TRIP signal should appear.
7. Switch off the fault current.
8. Set the measured current (fault current) in same phase to about 90% of the set operating
current
9. Switch on the fault current and wait longer than the set value
No TRIP signal should appear.
10. Switch off the fault current.
10.5.13.2

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.
10.5.14 Capacitor bank protection CBPGAPC
Prepare the IED for verification of settings as outlined in section
chapter.
In this section it is shown how to test the capacitor bank protection function CBPGAPC for
application on a 60Hz, 200MVAr, 400kV SCB with 500/5A ratio CT.
As calculated in the application manual the base current for this particular SCB will be 289A on the
primary side and 0.578A on the CT secondary side. Before any testing is commenced make sure
that setting
to the rated current of the protected SCB). It will be also assumed that all other settings have
values as shown in the setting example in the application manual for this SCB.
Test equipment
Connect the secondary test set to the CT inputs on the IED dedicated for the SCB currents. Single-
or three-phase test equipment can be used but it may be required to have facility to vary the
frequency of the injected current signal(s).
158
Pickup_PH .
Pickup_PH . Switch off the current.
Note that such SCB is shown in the application manual for this function. The same
procedure can be used to test SCB with some other rating and different CT ratio.
IBase for this function is set to 289A (that is, setting for the base current corresponds
tOper .
tOper .
TestMode setting to Disabled .
GUID-00163D04-EBA8-4CD2-9B7A-B3EC15D32069 v2
"Preparing for test"
1MRK 504 154-UUS B
tOper .
SEMOD175021-42 v4
in this
Commissioning manual