Setting Guidelines - ABB REC670 Applications Manual

1MRK 511 401-UEN A
8.15.3
Bay control REC670 2.2 IEC
Application manual
CBPGAPC function can be used to provide the last four types of protection
mentioned in the above list.

Setting guidelines

This setting example will be done for application as shown in figure 93:
400kV
500/1
200MVAr
400kV
IEC09000754 V1 EN-US
Figure 93: Single line diagram for the application example
From figure 93 it is possible to calculate the following rated fundamental frequency
current for this SCB:
×
1000 200[ MVAr
=
I
×
r
3 400[ kV
IEC09000755 V1 EN-US
or on the secondary CT side:
289 A
= =
I 0.578
r S _ ec
500 1
IEC09000756 V1 EN-US
Note that the SCB rated current on the secondary CT side is important for
secondary injection of the function.
The parameters for the Capacitor bank protection function CBPGAPC are set via
the local HMI or PCM600. The following settings are done for this function:
Preprocessing
Function Block
SMAI
]
=
289 A
]
A
Section 8
Current protection
GUID-CECD6525-779C-4A77-844D-031AAEE3A5B6 v1
GUID-7C456976-BA0D-4AAC-9C7A-F73AF52B2B44 v2
Capacitor bank
protection function
CBPGAPC
IED
IEC09000754-1-en.vsd
(Equation 89)
(Equation 90)
219