Siemens 7SR210 Argus, Application Manual

7SR210 & 7SR220 Applications Guide 

Page 4 of 40 

©2011 Siemens Protection Devices Limited 

List of Figures 

Figure 1.1-1

Example Use of Alternative Settings Groups.......................................................................5

Figure 1.2-1 Example of Transformer Alarm and Trip Wiring ..................................................................6

Figure 1.2-2 – Binary Input Configurations Providing Compliance with EATS 48-4 Classes 

ESI 1 and ESI 2 ...................................................................................................................8

Figure 1.4-1 LED configuration via the LED Matrix tab............................................................................9

Figure 1.4-2 LED configuration via the Settings \ OUTPUT CONFIG \ LED CONFIG menu ................10

Figure 2.1-1 IEC NI Curve with Time Multiplier and Follower DTL Applied ...........................................11

Figure 2.1-2

IEC NI Curve with Minimum Operate Time Setting Applied ..............................................12

Figure 2.1-3

Reset Delay........................................................................................................................13

Figure 2.4-1

General Form of DTL Operate Characteristic....................................................................15

Figure 2.4-2

Blocking Scheme Using Instantaneous Overcurrent Elements .........................................16

Figure 2.5-1

Sensitive Earth Fault Protection Application......................................................................17

Figure 2.6-1

 Directional Characteristics ................................................................................................18

Figure 2.6-2

Phase Fault Angles............................................................................................................18

Figure 2.6-3

Application of Directional Overcurrent Protection..............................................................19

Figure 2.6-4 Feeder Fault on Interconnected Network ..........................................................................20

Figure 2.7-1

Earth Fault Angles .............................................................................................................21

Figure 2.8-1

  Balanced and Restricted Earth-fault protection of Transformers.....................................22

Figure 2.8-2

 Composite Overcurrent and Restricted Earth-fault Protection .........................................23

Figure 2.11-1

Thermal Overload Heating and Cooling Characteristic..............................................24

Figure 2.13-1 NVD Application...............................................................................................................26

Figure 2.13-2 NVD Protection Connections ...........................................................................................26

Figure 2.15-1 Load Shedding Scheme Using Under-Frequency Elements ...........................................28

Figure 4.1-1

Sequence Co-ordination ....................................................................................................30

Figure 4.1-2

Example of Logic Application.............................................................................................32

Figure 4.2-1 Example Use of Quick Logic..............................................................................................33

Figure 5.1-1 - Circuit Breaker Fail ..........................................................................................................34

Figure 5.1-2 - Single Stage Circuit Breaker Fail Timing.........................................................................35

Figure 5.1-3 - Two Stage Circuit Breaker Fail Timing ............................................................................35

Figure 5.4-1:Trip Circuit Supervision Scheme 1 (H5) ............................................................................38

Figure 5.4-2:Trip Circuit Supervision Scheme 2 (H6) ............................................................................39

Figure 5.4-3:Trip Circuit Supervision Scheme 3 (H7) ............................................................................39

List of Tables 

Table 

2-1 

Application 

of 

IDMTL 

Characteristics 

     13 

Table 5-2 

Determination of CT Failure (1 or 2 Phases) 

36 

Table 5-3 

Determination of VT Failure (1 or 2 Phases) 

37 

Table 5-4 

Determination of VT Failure (3 Phases)   

37 

Table 

5-5 

Magnetic 

Inrush 

Bias 

       40