ABB RELION 620 Series Technical Manual page 801

1MRS757644 F
4.12.2.10
4.12.3
4.12.3.1
4.12.3.2
4.12.3.3
4.12.3.4
620 series
Technical Manual
Technical revision history
Table 759: CUBPTOC Technical revision history
Technical revision
B
Shunt capacitor bank switching resonance protection,
current based SRCPTOC
Identification
Function description
Shunt capacitor bank switching
resonance protection, current based
Function block
GUID-170BD62B-0F80-4DC6-AB28-219DEDD10E5C V1 EN
Figure 405: Function block symbol
Functionality
The shunt capacitor bank switching resonance protection, current based, function
SRCPTOC is used for detecting three-phase resonance caused by capacitor switching
or topology changes in the network. The operating characteristic is a definite time
(DT).
SRCPTOC contains a blocking functionality. It is possible to block function outputs,
timers or the function itself, if desired.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of SRCPTOC can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
Protection functions
Change
Selection name for Recorded unbalance changed.
IEC 61850 IEC 60617
identification identification
SRCPTOC TD>
Section 4
ANSI/IEEE C37.2
device number
55TD
795