Completing The Test; Capacitor Bank Protection Cbpgapc; Verifying The Settings And Operation Of The Function - ABB Relion 670 Series Commissioning Manual
Transformer protection
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Technical reference manual (1232 pages) ,
- Applications manual (944 pages)
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Section 11
Testing functionality by secondary injection
1.
Check that the input logical signal BLOCK to the BRCPTOC function block is logical zero
and note on the local HMI that the output signal TRIP from the BRCPTOC 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.
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.
11.5.14.2
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.
11.5.15
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 50Hz, 200MVAr, 400kV SCB with 500/1A 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
corresponds 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).
11.5.15.1
Verifying the settings and operation of the function
Reconnection inhibit feature
182
IP> .
IP> . 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
© Copyright 2017 ABB. All rights reserved
tOper .
tOper .
TESTMODE setting to Off .
GUID-00163D04-EBA8-4CD2-9B7A-B3EC15D32069 v2
"Preparing for test"
GUID-81B167DE-7A86-4CBA-86E7-560A6B3EA665 v1
GUID-C3E7B2EA-FF69-4D2B-BBDF-A135A97E4862 v2
Transformer protection RET670
Commissioning manual
1MRK 504 165-UEN E
tOper .
SEMOD175021-42 v4
in this
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