Figure 3.2 Connection To The Auxiliary Power Supply - Siemens 7SN71 Instruction Manual

3
Operating instructions
Transient earth-fault relay 7SN71
3.3 Connection to auxiliary power supply
Connection is either made to the 230 V AC mains or
between two phases (100 V) of the v.t.s. Connection
to the station battery is also possible (see figure 3.2).
DC
terminals for
flash mounting
terminals for
surface mounting
Connection
to substation
battery
Figure 3.2 Connection to the auxiliary power supply
3 - 2
Instruction Manual
DC
DC AC
Connection
to lighting
system
Order No.: E50410-A0007-U501-A1-7691
DC
AC
Connection to the
voltage transformer
L1
L2
L3
Siemens AG March 1997