Hitachi Relion 650 Series Technical Manual page 344

Section 12
Monitoring
X= operating time of Primary contact for open command
Y= operating time of NO contact for open command
Z= operating time of NC contact for open command
p=phase
IEC17000267 V2 EN-US
Figure 151: Expected sequence of contact status changes for opening one circuit breaker pole
CBLEARN can be activated from LHMI menu or by activating the CBTMD input. Once this trigger
goes high, CBLEARN enters the learning mode (the LERACTIVE output becomes high) and it
remains in this mode until FINISH or ABORT inputs are activated. In learning mode, CBLEARN
interacts closely with the SSCPOW function block, as shown in
338
CMDOPEN
coorBLSS
CMDOPLp
INPNOLp
Y
X
Z
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INPPRILp
INPNCLp
Figure 152.
1MRK 511 557-UEN Rev. A
Time
IEC17000267-2-en.vsdx
Technical Manual