• A bi-stable relay (BR) or two auxiliary relays to simulate a CB
• Two push-buttons (SC, ST) to operate the BR and a change-over switch (SRY)
to simulate CBREADY
• Possibly a switch simulation the synchronizing check SESRSYN condition
IED
SMBRREC - CLOSECB
Trip
SMBRREC - CBPOS
SMBRREC - CBREADY
BR
SC
ST
SRY
To test
set
+ -
IEC09000206_1_en.vsd
EN09000206 V1 EN
Figure 14: Simulating the CB operation by a bi-stable relay/breaker simulator
and manual switches
6.7.2.1 Preparation of the verification
1. Check the function settings on the local HMI under Main menu/Settings/
IED Settings/Control/SMBRREC(79,0->1)/1:SMBRREC
If any timer settings are reduced to speed up or facilitate the testing, they shall
be set to normal after testing. A temporary label on the IED can be a reminder
to restore normal settings after which a verification test should be performed.
2. Decide if a synchronizing check function SESRSYN shall be included in the
test.
If SESRSYN as an internal function or external device is not operated by the
injection, it may be connected as a permanent high signal or controlled by a
switch.
3. Read and make notes of the reclosing operation counters on the local HMI
under Main menu/Tests/Function status/Control/SMBRREC(79,0->1)/
1:SMBRREC
Possibly reset the counters to Zero. Counters are reset in the reset menu.
4. Make arrangements for the simulation of the CB, for example as in figure
14.
5. Make arrangements for indication, recording and time measurements.
The signals for CBPOS, START, CLOSECB, READY and other relevant
signals should preferably be arranged for event recording with time tagging.
Section 6 1MRK 511 248-UEN -
Testing functionality
80
Commissioning Manual
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