Operation Principle - Hitachi Relion 650 Series Technical Manual

1MRK 511 557-UEN Rev. A
12.16.7

Operation principle

In order to optimize the predicted circuit breaker switching times, analog parameters such as idle
time, control voltage, ambient temperature, drive pressure, and spring charge can be monitored
periodically through appropriate sensors. In a typical application, ANSCAL converts each sensor
signal to a compensation value (that is, time deviation from nominal operating time), which is then
supplied to CBCOMP. All associated compensation values are added up to yield six total
compensation values COMPCLLx and COMPOPLx, two per phase. See
Close/Open time correction
Alarms for time correction
Close/Open time correction
Alarms for time correction
Close/Open time correction
Alarms for time correction
IEC17000252 V2 EN-US
Figure 114: CBCOMP internal data processing
The number of available sensors and their respective health status are taken into account for the
calculations. Each compensation scheme can be configured to provide compensation for Open
operations, Close operations, or both. For each parameter to be compensated, CBCOMP features a
dedicated group of compensation values inputs, as explained in
Technical Manual
enable3Or1Sensor
values for phase L1
Alarm/Correction
for phase L1
for phase L1
Alarm/Correction
Sensor status indications
for phase L2
for phase L1
Alarm/Correction
values for phase L2
for phase L3
for phase L2
Sensor status indications
for phase L2
Sensor status
indicator L1
values for phase L3
Sensor status
indicator L2
for phase L3
Sensor status indications
Sensor status
for phase L3
indicator L3
FALSE
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Figure
COMPCLL1
T
COMPOPL1
F
T
COMPCLL2
F
COMPOPL2
T
F
COMPCLL3
COMPOPL3
T
F ALMSTS
T
LOSCOPSG
F
T
F
Table 244.
Section 12
Monitoring
GUID-7AA751F1-8726-48D9-BE07-072A5A905CDD v3
114.
243