Check That The Ar Function Works; Check That Reclosing Does Not Occur When It Is Not Meant To5-71 - ABB REC 561 User Manual

ABB Network Partner AB
Version 1.0-00
4.1.2 Check that the AR
function works
4.1.3 Check that reclosing
does not occur when
it is not meant to
Auto-reclosing - Single- and/or
three-phase
1.2 Read and note the reclosing operate counters from the MMI tree:
Service report
AR Counters
AR01-Counters (for AR No. 1)
1.3 Do the testing arrangements outlined above, for example, as in Fig.
10.
1.4 The AR01-CBCLOSED breaker position, the commands Trip and
Closing, AR01-CLOSECB, and other signals should preferably be
arranged for event recording, which is providing time measurements.
Otherwise, a separate timer or recorder can be used to check the AR
open time and other times.
2.1 Ensure that the voltage inputs to Synchro-check are such that they are
giving accepted conditions at open breaker (BR). They can, for exam-
ple, be Live busbar and Dead line.
2.2 Set the operation at On.
2.3 Make a BR pickup by a closing pulse, the SC-pulse.
2.4 Close SRY, Breaker ready and leave it closed.
2.5 Inject AC quantities to give a trip and start AR.
Observe or record the BR operation. The BR relay should trip and
reclose. After the closing operation, the SRY switch could be opened
for about 5 s, and then closed.
The AR open time and the operating sequence should be checked, for
example, in the event recording.
Check the operate indications and the operate counters.
Should the operation not be as expected, the reason must be investi-
gated. It could be due to an AR Off state or wrong program selection,
or not accepted synchro-check conditions.
2.6 A few fault cases may be checked, for example, single-phase and
three-phase tripping, transient, and permanent fault. The signal
sequence diagrams in Fig. 8 and 9 can be of guidance for the check.
The number of cases can be varied according to the application. Examples
of selection cases are:
3.1 Inhibit input signal: Check that the function is operative and that the
breaker conditions are OK. Apply an AR01-INHIBIT input signal
and start the reclosing function. No reclosing.
3.2 Breaker open, closing onto a fault: Put the breaker simulating relay,
BR, in open position. Close it with the SC switch and start the AR
within a second. No reclosing.
3.3 Breaker not ready: Close the BR breaker relay and see that everything
except for AR01-CBREADY is in normal condition; SRY is open.
Start the AR function. No reclosing.
1MRK 580 170-XEN
Counters
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