1. Check that the autorecloser function SMBRREC is operative, for example by
making a reclosing shot.
Keep the CBREADY signal high.
2. Set the breaker simulating relay BR in Open position.
3. Close the BR relay and apply immediately a fault and thereby a START signal.
4. Check that no reclosing takes place.
Checking the influence of CB not ready for reclosing
1. Check that the autorecloser function SMBRREC is operative, for example by
making a reclosing shot.
Keep the CB simulator BR closed. Remove the CBREADY signal by opening
SRY.
2. Apply a fault and thereby a START signal.
3. Check that no reclosing takes place.
Checking the influence of synchronizing check (at three-phase
reclosing)
1. Check that the autorecloser function SMBRREC is operative, for example, by
making a three-phase reclosing shot with the SESRSYN synchronizing check
condition.
Set the SESRSYN function to Off to eliminate the signal connected to input
signal SYNC.
2. Apply a fault causing three-phase trip and thereby a START and a TR3P signal.
3. Wait for the tSync time-out limit.
Check that no reclosing is made.
Checking the response when autoreclosing is
Off
Procedure
1. Check that the autorecloser function SMBRREC is operative, for example by
making a reclosing shot.
Set the autoreclosing operation to Off, for example by external control.
The output READY shall be low, and PREP3P shall be high.
2. Apply a single phase fault and thereby a START signal.
3. Check that a definitive three phase trip and no reclosing takes place.
Testing autoreclosing in a multi-breaker arrangement
The usual arrangement is to have an autorecloser function SMBRREC per circuit-
breaker. They can be in different CB related IEDs or in a common IED.
• A master SMBRREC function is set with Priority = High.
• A slave SMBRREC function is set with Priority = Low.
Section 10 1MRK 511 360-UEN A
Testing functionality by secondary injection
154 Bay control REC670 2.1 IEC
Commissioning manual
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