Siemens 7SR45 Argus User Manual page 105

Relay
Applications
7SR45
1. CT circuits shown are
Argus Relay
connected to 1 A or 5 A of
for
7SR45 Argus relay.
Distribution
Transformer
2. CT and Earth connections are
Application
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 binary input is
possible.
© 2018 Siemens Protection Devices Limited
Description
Figure 1-16
Chapter 5 - 7SR45 Installation Guide
IL1 IL2 IL3
24 V DC, 0.1 Ws
Distribution
Transformer
IL1 IL2 IL3 N
Low
Voltage
7SR45 Argus Relay for Distribution Transformer Application
Connections
L
7SR45
IL1
N
IL2
PO
IL3
+ ve
- ve
IL4
230 V AC
Chapter 5 Page 11 of 12