Setting Guidelines - ABB REC670 Applications Manual

Section 8
Current protection
8.15.3
232
1. Short circuit protection for SCB and connecting leads (can be provided by using
PHPIOC, OC4PTOC, CVGAPC, T2WPDIF/T3WPDIF or HZPDIF functions)
2. Ground-fault protection for SCB and connecting leads (can be provided by using
EFPIOC, EF4PTOC, CVGAPC, T2WPDIF/T3WPDIF or HZPDIF functions)
3. Current or Voltage based unbalance protection for SCB (can be provided by using
EF4PTOC, OC4PTOC, CVGAPC or VDCPTOV functions)
4. Overload protection for SCB
5. Undercurrent protection for SCB
6. Reconnection inhibit protection for SCB
7. Restrike condition detection
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:
GUID-CECD6525-779C-4A77-844D-031AAEE3A5B6 v1
GUID-7C456976-BA0D-4AAC-9C7A-F73AF52B2B44 v2
Preprocessing Capacitor bank
Function Block protection function
SMAI
Bay control REC670 2.2 ANSI
1MRK 511 401-UUS A
CBPGAPC
IED
IEC09000754-1-en.vsd
Application manual