Table of Contents

ABB / Capacitor bank protection (CBPGAPC) _ Setting & highlights _ AB2128

Table of Contents

Overview

Shunt Capacitor Banks (SCB) are used in a power system to provide reactive power compensation and power factor correction. They are as well used as integral parts of Static Var Compensators (SVC) or Harmonic Filters installations. The “Capacitor bank protection” function is specially designed to provide protection and supervision features for SCBs.

For more detailed information on “Capacitor bank protection” function, refer to ABB, Relion 670 Series manuals.

To see other supported functions, click here.


Function Identification

Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Capacitor bank protection CBPGAPC

Signals & Setting Parameters


CBPGAPC function block

CBPGAPC function block

CBPGAPC Input signals

CBPGAPC Input signals
Name Type Default Description
I3P GROUP SIGNAL Three Phase Current Input
BLOCK BOOLEAN 0 Block the complete function
BLKTR BOOLEAN 0 Block all trip output signals
BLKOC BOOLEAN 0 Block over current functionality
BLKUC BOOLEAN 0 Block under current functionality
BLKUCCUT BOOLEAN 0 Block UC function when the capacitor bank is disconnected
BLKQOL BOOLEAN 0 Block reactive power over load functionality
BLKHOL BOOLEAN 0 Block harmonic over load functionality

CBPGAPC Output signals

CBPGAPC Output signals
Name Type Description
TRIP BOOLEAN General trip signal
TROC BOOLEAN Trip signal for over current
TRUC BOOLEAN Trip signal for under current
TRQOL BOOLEAN Trip signal for reactive power over load
TRHOL BOOLEAN Trip signal for harmonic over load
START BOOLEAN General start signal
STOC BOOLEAN Start signals for over current
STUC BOOLEAN Start signal for under current
STQOL BOOLEAN Start signal for reactive power over load
STHOL BOOLEAN Start signal for harmonic over load
STOCL1 BOOLEAN Start signal for over current of phase L1
STOCL2 BOOLEAN Start signal for over current of phase L2
STOCL3 BOOLEAN Start signal for over current of phase L3
STUCL1 BOOLEAN Start signal for under current of phase L1
STUCL2 BOOLEAN Start signal for under current of phase L2
STUCL3 BOOLEAN Start signal for under current of phase L3
STQOLL1 BOOLEAN Start signal for reactive power over load of phase L1
STQOLL2 BOOLEAN Start signal for reactive power over load of phase L2
STQOLL3 BOOLEAN Start signal for reactive power over load of phase L3
STHDTL1 BOOLEAN Start signal harmonic over load Definite Time stage phase L1
STHDTL2 BOOLEAN Start signal harmonic over load Definite Time stage phase L2
STHDTL3 BOOLEAN Start signal harmonic over load Definite Time stage phase L3
STHIDML1 BOOLEAN Start signal for harmonic over load IDMT stage of phase L1
STHIDML2 BOOLEAN Start signal for harmonic over load IDMT stage of phase L2
STHIDML3 BOOLEAN Start signal for harmonic over load IDMT stage of phase L3
RECNINH BOOLEAN Capacitor bank reconnection inhibit signal

CBPGAPC Group settings (basic)

CBPGAPC Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Off
On
Off Operation Off/On
OperationRecIn Off
On
On Inhibit reconnection for operation Off/On
IRecnInhibit< 4 – 1000 %IB 1 10 Current in % of IBase below which the SCB is disconnected
tReconnInhibit 1.00 – 6000.00 s 0.01 300.00 Time delay for Capacitor Bank voltage to discharge to <5%
OperationOC Off
On
On Operation over current Off/On
IOC> 10 – 900 %IB 1 135 Start level for over current operation,
% of IBase
tOC 0.00 – 6000.00 s 0.01 30.00 Time delay for over current operation
OperationUC Off
On
Off Operation under current Off/On
IUC< 5 – 100 %IB 1 70 Start level for under current operation in % of IBase
tUC 0.00 – 6000.00 s 0.01 5.00 Time delay for under current operation
OperationQOL Off
On
On Operation reactive power over load Off/On
QOL> 10 – 900 % 1 130 Start level for reactive power over load in %
tQOL 1.00 – 6000.00 s 0.01 60.00 Time delay for reactive power overload operation
OperationHOL Off
On
On Operation harmonic over load Off/On
HOLDTU> 10 – 500 % 1 200 Start value of voltage in % for DT harmonic voltage overload
tHOLDT 0.00 – 6000.00 s 0.01 10.00 Time delay for operation of harmonic voltage overload
HOLIDMTU> 80 – 200 % 1 110 Start value of voltage in % for IDMT harm. voltage overload
kHOLIDMT 0.50 – 1.50 0.01 1.00 Time multiplier for harmonic voltage overload IDMT curve
tMaxHOLIDMT 0.05 – 6000.00 s 0.01 2000.00 Maximum trip delay for harmonic voltage overload
tMinHOLIDMT 0.05 – 60.00 s 0.01 0.10 Minimum trip delay for harmonic voltage overload

CBPGAPC Non group settings (basic)

CBPGAPC Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 – 12 1 1 Selection of one of the Global Base Value groups

CBPGAPC Monitored data

CBPGAPC Monitored data
Name Type Values (Range) Unit Description
IPEAKL1 REAL A Equivalant RMS current for phase L1
IPEAKL2 REAL A Equivalant RMS current for phase L2
IPEAKL3 REAL A Equivalant RMS current for phase L3
URMSL1 REAL % Calculated voltage RMS for phase L1
URMSL2 REAL % Calculated voltage RMS for phase L2
URMSL3 REAL % Calculated voltage RMS for phase L3
QL1 REAL % Reactive power value for phase L1
QL2 REAL % Reactive power value for phase L2
QL3 REAL % Reactive power value for phase L3

Logics & highlights


Quantities formula (1/2)

Quantities formula (1/2)

Quantities formula (2/2)

Quantities formula (1/2)

Simplified logic diagram about used analog quantities within one phase

Simplified logic diagram about used analog quantities within one phase

Capacitor bank energization check for one phase. Similar for all three phases

Capacitor bank energization check for one phase. Similar for all three phases

Capacitor bank reconnection inhibit

Capacitor bank reconnection inhibit

Capacitor bank overcurrent protection

Capacitor bank overcurrent protection

Capacitor bank undercurrent protection

Capacitor bank undercurrent protection

IDMT curve for harmonic overload (kHOLIDMT=1.0)

IDMT curve for harmonic overload (kHOLIDMT=1.0)

Simplified logic diagram for harmonic overload

Simplified logic diagram for harmonic overload

Capacitor bank reactive power overload protection

Capacitor bank reactive power overload protection

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