Setting Guidelines - ABB REB670 Applications Manual

Section 7
Current protection
7.10.3
226
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 99:
400kV
500/1
200MVAr
400kV
IEC09000754 V1 EN
Figure 99: Single line diagram for the application example
From figure 99 it is possible to calculate the following rated fundamental frequency
current for this SCB:
Preprocessing Capacitor bank
Function Block protection function
SMAI
1MRK 505 337-UUS -
CBPGAPC
IED
IEC09000754-1-en.vsd
Application manual