Reactor Winding, Solidly Earthed - ABB RELION 650 Series Applications Manual

Section 6
Differential protection
REFPDIF
I3PW1CT1
I3PW2CT1
IdN/I
IEC09000111-4-EN V2 EN-US
Figure 29: Connection of restricted earth fault, low impedance function REFPDIF for an
6.1.2.4

Reactor winding, solidly earthed

Reactors can be protected with restricted earth-fault protection, low impedance function
REFPDIF. The connection of REFPDIF for this application is shown in figure 30.
70
I3P
autotransformer, solidly earthed
-
Auto
transformer
IEC09000111-4-EN.vsd
1MRK 505 363-UEN A
HV (W1)
LV (W2)
M13048-18 v10
Application manual