Siemens ISGS SG8158-00 - Manual (Page 85)

Appendix E: Schematics
Siemens Energy & Automation, Inc. 79
E Schematics
E.1 DC Trip System
The following diagram illustrates a typical connection
scheme for the ISGS relay when using a DC trip system.
Figure E.1 Wiring for DC Trip Systems
52 SRC
LS
88
52T 52a 52a
52b
31
3
1
6
1
4
15
2
1
4
N P
3 1
4 2
3 1
4 2
Fuse Fuse
Fuse Fuse
RES
RES
RES
RES
RG
3 4
CS C
95C
1 2
CS T
15
16
12
20 19 49 48
14
21
1
ISGS Relay
11
7
1
8
13
T
rip
Common
Impedance Source
Impedance Sense
T
rip 1
T
rip 2
BI T
rip
Ground Monitor
PS IN2 PS IN1
BI BSW
Monitors b-contacts
Monitors a-contacts and trip coil
T
rip Source
Impedance
Sense Circuit
Power Supply
(DC-DC)
95C Optional Remote Closing
Optional RS-485 Communications
+ -
(see below)
Case Ground
DC
Supply
(Station Battery)
49 48
Optional RS-485 Communications
Outgoing RS-485 Bus Incoming RS-485 Bus
Data +
Data + Data +
Data -
Data - Data - Shield Shield
Key 52a
Aux Switch (open when breaker is open)
52b
Aux Switch (closed when breaker is open)
52T
Opening Solenoid (Trip)
52SRC
Spring Release Solenoid
88
Spring Charging Motor
CS/C
Control Switch/Close
CS/T
Control Switch/T
rip
R
Red Lamp (breaker open)
G
Green Lamp (breaker open)
95C
Interposing Relay
LS
???
Breaker
*Contact is
closed when
relay is out of service
Relay Disabled*
E
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