• 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 (25) condition
IED
Trip
BR
SC
ST
SRY
To test
set
+ -
SMBRRECSimulatingtheCBoper
ationbyabistablerelayand =
ANSI09000206_en_1
SMBRREC (79) - CLOSECB
SMBRREC (79) - CBPOS
SMBRREC (79) - CBREADY
ANSI09000206 V1 EN
Figure 17: 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)/SMBRREC:1
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 (25) shall be included in the
test.
Section 6 1MRK 505 293-UUS A
Testing functionality
102
Commissioning manual
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