Hitachi Relion 650 Series Technical Manual page 302

Section 12
Monitoring
CCLCMDLX
INPNCLX
Primary
INPNOLX
Travel curve
T
A
T
C
IEC19000919 V2 EN-US
Figure 138: Events during CB closing operation
The mechanical closing time, initial mechanical delay, and mechanical moving time are evaluated
based on the selected auxiliary feedback signal determined via AuxPosAvailable and enabled
MechMonitor.
The mechanical closing time is the time gap between the instant of received close command and
instant of primary contact touch as shown in
directly accessible, it is interpolated from the NO and NC changeover timestamps. Subsequent to the
interpolated primary contact touch instant, the mechanical closing time is evaluated as given in
272.
296
T
A
= Initial mechanical delay
= Mechanical closing time
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T
B
T
C
T =Mechanical moving time
B
Figure 138. As the instant of primary contact touch is not
1MRK 511 557-UEN Rev. A
IEC19000919-1-en.vsdx
Technical Manual
Table