3.7.12.3 Setting parameters
Table 117: BRCPTOC (46) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Operation Disable / Enable
IBase 0 - 99999 A 1 3000 IBase
Pickup_ub 50 - 90 %IM 1 50 Unbalance current operation value in percent
of max current
Pickup_PH 5 - 100 %IB 1 20 Minimum phase current for operation of
pickup_ub> in % of Ibase
tOper 0.000 - 60.000 s 0.001 5.000 Operate time delay
Table 118: BRCPTOC (46) Group settings (advanced)
Name Values (Range) Unit Step Default Description
tReset 0.010 - 60.000 s 0.001 0.100 Time delay in reset
3.7.13 Capacitor bank protection CBPGAPC
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Capacitor bank protection CBPGAPC - -
3.7.13.1 Application
Shunt capacitor banks (SCBs) are somewhat specific and different from other power
system elements. These specific features of SCB are briefly summarized in this section.
A capacitor unit is the building block used for SCB construction. The capacitor unit is
made up of individual capacitor elements, arranged in parallel or series connections.
Capacitor elements normally consist of aluminum foil, paper, or film-insulated cells
immersed in a biodegradable insulating fluid and are sealed in a metallic container. The
internal discharge resistor is also integrated within the capacitor unit in order to reduce
trapped residual voltage after disconnection of the SCB from the power system. Units
are available in a variety of voltage ratings (240V to 25kV) and sizes (2.5kVAr to
about 1000kVAr). Capacitor unit can be designed with one or two bushings.
The high-voltage SCB is normally constructed using individual capacitor units
connected in series and/or parallel to obtain the required voltage and MVAr rating.
Typically the neighboring capacitor units are mounted in racks. Each rack must be
Section 3 1MRK504116-UUS C
IED application
494
Application manual
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