Siemens 7SR45 Argus User Manual page 103

1.4
7SR45 Argus Relay Applications
Relay
Applications
7SR45
1. CT circuits shown are
Argus Relay
connected to 1 A or 5 A of
for RMU
7SR45 Argus relay.
Application
2. CT and Earth connections are
typical only.
3. Measures the phase current of
the Primary CT only.
4. Application shows the use of
50/51/50N/51N/50LC
protection functions.
5. Remote trip via
Communication (through BO
with Auxiliary input present)
and Binary input is possible.
7SR45 Self
1. CT circuits shown are
Powered
connected to 1 A or 5 A of
Relay for
7SR45 Argus relay.
RMU
Application
2. CT and Earth connections are
typical only.
3. Measures the phase current
and earth current of the
Primary CT only.
4. Application shows the use of
50/51/50N/51N/
50LC/50G/51G protection
functions.
5. Remote trip via
Communication (through BO
with Auxiliary input present)
and Binary input is possible.
© 2018 Siemens Protection Devices Limited
Description
Figure 1-13
Figure 1-14
Chapter 5 - 7SR45 Installation Guide
Connections
IL1 IL2 IL3
Standard release
7SR45 Argus Relay for RMU Application
IL1 IL2 IL3
24 V DC, 0.1 Ws
7SR45 Self Powered Relay for RMU Application
7SR45
L
IL1
24 V to 60 V DC
60 V to 240 V DC/AC
N
IL2
BO
IL3
IL4
Battery
7SR45
IL1
IL2
PO
IL3
+ ve
- ve
IL4
Chapter 5 Page 9 of 12