Siemens 7SR45 Argus User Manual page 104

Relay
Applications
7SR45 Self
1. CT circuits shown are connected
Powered
to 1 A or 5 A of 7SR45 Argus
Relay for
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 1-15 7SR45 Self Powered Relay for Distribution Transformer Application
Chapter 5 - 7SR45 Installation Guide
Connections
IL1 IL2 IL3
24 V DC, 0.1 Ws
Distribution
Transformer
IL1 IL2 IL3 N
7SR45
IL1
IL2
PO
IL3
+ ve
- ve
IL4
Chapter 5 Page 10 of 12