ABB RER670 - Completing the Test; Overcurrent Protection with Binary Release BRPTOC; Measuring the Operate Limit of Set Values

Checking the case with fault current below set value I>BlkCont
M12104-281 v10
It simulates a case where the fault current is very low and operation will depend on
CB position signal from CB auxiliary contact. It is suggested that re-trip without
current check is used, setting RetripMode = No CBPos Check.
1. Set FunctionMode = Current/Contact.
2. Apply the input signal for CB closed to the relevant input or inputs
CBCLDL1 or CBCLDL2.
3. Apply the fault condition with input signal START of CCRWRBRF. The
value of current should be below the set value I>BlkCont.
4. Verify that the re-trip (if selected) and back-up trip are achieved after set
times. Failure to trip is simulated by keeping the signal(s) CB closed
activated.
5. Disconnect the input signal START. Keep the CB closed signal(s).
6. Apply the fault and the start again. The value of current should be below the
set value I>BlkCont.
7. Arrange disconnection of BC closed signal(s) well before set back-up trip
time t2. It simulates a correct CB tripping.
8. Verify that back-up trip is not achieved. Re-trip can appear for example, due
to selection “Re-trip without current check”.
10.5.7.8 Completing the test
M12104-72 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.
10.5.8 Overcurrent protection with binary release BRPTOC
GUID-EB5AEFC4-6F51-4E1E-8055-4FEC53CA81FD v2
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
Logical signals for BRPTOC protection are available on the local HMI underMain
menu/Settings/IED Settings/Current protection/OvercurrBinRel (50, 2I>)/
BRPTOC (50, 2I>):x.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
10.5.8.1 Measuring the operate limit of set values
GUID-4FF9AAC6-04B7-4A26-9093-C199C0C50540 v3
1. Check that the input logical signals BLOCK and BLKTR and the output
logical signal TRIP are all logical zero.
2. If required, activate the input RELEASE on the BRPTOC function block.
3. For a short while inject a current (fault current) in one phase to about 110% of
the set operating current I>, and switch the current off.
Section 10 1MRK 506 377-UEN C
Testing functionality by secondary injection
118 Railway application RER670 2.2 IEC
Commissioning manual