Operation Principle - ABB RELION REX640 Technical Manual

1MRS759142 C
4.12.1.5
REX640
Technical Manual

Operation principle

The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "on" and "off".
The operation of COLPTOC can be described using a module diagram. All the
modules in the diagram are explained in the next sections.
I_A
I_B
I3P
I_C
CB_CLOSED
BLOCK
GUID-2FE234FB-2EB5-4559-BDBC-5A5F2ACF209C V1 EN
Figure 547: Functional module diagram
Peak integrated current calculator
The peak integrated current calculator calculates peak value of integrated current
(I_PEAK_INT_A, I_PEAK_INT_B and I_PEAK_INT_C) which is proportional
to the voltage over capacitor. The I_PEAK_INT_A, I_PEAK_INT_B and
I_PEAK_INT_C values are available in monitored data view. The frequency
response of the peak integrated current calculator can be seen in
Peak
Operate
integrated
level
current
detector
calculator
Alarm
level
detector
Under
current
detector
Blocking
logic
Section 4
Protection functions
Timer 1
OPR_OVLOD
t
ST_OVLOD
Timer 2
t
ALARM
Timer 3
OPR_UN_I
t
ST_UN_I
Inhibit
BLK_CLOSE
reclose
Figure 548.
1011