Siemens 7SR12 Argus User Manual

7SR11 & 7SR12 Description Of Operation
Chapter 1 Page 6 of 88 ©2017 Siemens Protection Devices Limited
Figure 3-27 Logic Diagram: Under/Over Voltage Elements (27/59) ....................................................................... 54
Figure 3-28 Logic Diagram: NPS Overvoltage Protection (47) ............................................................................... 55
Figure 3-29 Logic Diagram: Neutral Overvoltage Element (59N) ........................................................................... 56
Figure 3-30 Logic Diagram: Under/Over Frequency Detector (81) ...................................................................... 57
Figure 3-31 Logic Diagram: Power Protection (32) ............................................................................................. 58
Figure 3-32 Logic Diagram: Sensitive Power Protection (32S)............................................................................ 59
Figure 3-33 Logic Diagram: Power Factor Protection (55) .................................................................................. 60
Figure 4-1 Typical AR Sequence with 3 Inst and 1 Delayed trip ............................................................................. 63
Figure 4-2 Basic Auto-Reclose Sequence Diagram ............................................................................................... 67
Figure 4-3 Logic Diagram: Circuit Breaker Status .................................................................................................. 70
Figure 4-4 Sequence Diagram: Quick Logic PU/DO Timers (Counter Reset Mode Off) ......................................... 72
Figure 5-1 Logic Diagram: Circuit Breaker Fail Protection (50BF) .......................................................................... 73
Figure 5-2 Logic Diagram: VT Supervision Function (60VTS) ................................................................................ 75
Figure 5-3 Logic Diagram: CT Supervision Function (60CTS) – 7SR11 ................................................................. 76
Figure 5-4 Logic Diagram: CT Supervision Function (60CTS) – 7SR12 ................................................................. 77
Figure 5-5 Logic Diagram: Broken Conductor Function (46BC) ............................................................................. 77
Figure 5-6 Logic Diagram: Trip Circuit Supervision Feature (74TCS) .................................................................... 78
Figure 5-7 Logic Diagram: Close Circuit Supervision Feature (74CCS) ................................................................. 78
Figure 5-8 Functional Diagram for Harmonic Block Feature (81HBL2) .................................................................. 79
Figure 6-1 Energy Direction Convention ................................................................................................................. 83
List of Tables
Table 1-1 7SR11 Ordering Options .................................................................................................................... 9
Table 1-2 7SR12 Ordering Options .................................................................................................................. 14
Table 2-1 Summary of 7SR1 Relay Configurations .......................................................................................... 18
Table 2-2 Power Supply Unit (PSU) options .................................................................................................... 21
Table 6-1 Operating Mode ............................................................................................................................... 85
S
YMBOLS AND NOMENCLATURE
The following notational and formatting conventions are used within the remainder of this document:
• Setting Menu Location MAIN MENU>SUB-MENU
• Setting: Elem name -Setting
• Setting value: value
• Alternatives: [1st] [2nd] [3rd]

Siemens 7SR12 Argus Specifications

General

Brand	Siemens
Model	7SR12 Argus
Category	Protection Device
Language	English